Drainage system of a private house. Drainage around the house: basic technology, types of drainage systems and their cost

30.10.202327.05.2017

In a private house there are several places that need to be protected from getting wet from the outside. These are the foundation and buried buildings. Rainwater, all kinds of drains and rising groundwater gradually destroy the monolithic foundations and walls of basements. A properly equipped drainage system around the house can prevent this process from occurring. It is capable of removing excess moisture from structures. Even a very good blind area cannot compare in terms of protection for a house with a installed drainage system. It is highly recommended to install such a system near every house, regardless of the presence of a basement or ground floor.

A high-quality drainage system around the house with your own hands can be made in several options:

Features of different foundation drainage systems

The choice of a specific type of drainage depends on the presence of buried rooms, the depth of groundwater, the composition of the soil on the site and the topography of the site itself. Let's consider what features the drainage system around the house has.

In total, there are 3 types of drainage, which differ in their location and design:

Important: Please note that reservoir drainage does not replace another type of drainage, but only complements it. Therefore, in addition to it, a main drainage system must be installed.

Please note that if you decide to make a ring drainage around the house with your own hands, the system should be located 0.5 m below the foundation level. This arrangement will ensure high-quality drainage of groundwater from the building at any time of the year.

And if you are thinking about this, then you may find our separate material on this topic useful.

Drainage installation

Let's look at how to make a drainage system around the house in two ways.

Manufacturing of wall drainage

Before carrying out the work, it is necessary to prepare the foundation, since the system will be directly adjacent to it.

To do this, the following work is carried out:

The foundation from the outside is primed with a special bitumen primer.
Bitumen mastic is applied to the dried surface.
A reinforcing mesh with 2 x 2 mm cells is glued onto the mastic.
The next day, after the mastic has hardened, a second layer of mastic is again applied to the mesh.

The photo shows the drainage system around the house - a trench and inspection wells along the edges

A collector well is installed to which drainage pipes will be connected. It is located at the lowest point on the site;
using a laser or building level, the slope of the trench running near the foundation is ensured towards the drainage basin;
the bottom of the trenches is covered with a layer of sand of at least 5 cm;
geotextiles are laid on the sand, the sides of which will subsequently be wrapped overlapping;
a gravel backfill is created having a thickness of about 10 cm;
Prepared perforated pipes are laid on the gravel layer. Their slope is ensured at 2 degrees;
pipes are joined with adapters and corner connectors;
at the corners of the building, all pipelines enter installed inspection wells;
Pipes are laid from inspection wells to drain water into a collection well or drainage pit. These pipes are also located in trenches and have a slope;
The pipes are filled with gravel (about 10 cm) and the entire contents are wrapped in geotextiles. Using synthetic ropes, geotextiles are firmly fixed;
further backfilling of the trenches to the soil level is carried out with sand or turf soil.

We looked at how to make drainage around a wall-type foundation. Next, we will pay attention to the manufacture of trench drainage, which is even more popular.

Manufacturing of ring drainage

For this type of work you will also need perforated pipes, crushed stone, sand and geotextiles. When a ring drainage system is made around a house, the technology involves digging trenches at a distance of 5-8 m from the foundation of the building to eliminate the possibility of subsidence of the soil around it. The trenches are located around the structure and form a closed system. The depth of the trenches should be such that the drainage passes 50 cm below the foundation level.

Immediately draw a trench (or several trenches) towards the main drainage well. The slope of the trenches is ensured at least 2-3 cm per linear meter. The slope can be adjusted by adding sand in the right places.

the bottom of the trenches is lined with a layer of sand, and then with geotextiles, the edges of which are wrapped on their walls;
crushed stone is poured onto the geotextile in a layer of 10 cm;
Pipes with holes drilled in them are laid out on the crushed stone. It is advisable to use a pipe diameter of at least 10 cm. It is advisable to first wrap all pipes with a layer of geotextile, which will prevent them from clogging;

Tip: Regular PVC pipes used for sewerage are quite suitable. You can drill holes of small diameter in them with a drill, arranging them in a certain order.

the slope of the pipes is checked, which must be at least 2 degrees;
At pipe bends, inspection wells are installed, covered with removable covers. The same wells should be installed on long straight sections, in increments of 12 m;
crushed stone or gravel is poured over the laid pipes in a layer of 20-30 cm;
the entire “pie” inside the trenches is wrapped with geotextile overlapping;
the remaining space in the trenches is filled with river sand and covered with turf.

Features of drainage wells

Any drainage around a site or building must be constructed using several inspection wells located at pipe bends. It is in these places that drainage pipes become clogged most often. Through the inspection well, you can monitor the cleanliness of the drains and clean them if necessary. Wells can be purchased or made from any materials. They should have such a width that it is convenient to clean them by placing your hand there.

In addition to several inspection wells, at the lowest point of the site there is collector well, designed to collect all the water flowing through the channels. This is a wider and more voluminous structure, which can be concrete, plastic or metal. Its depth is chosen so that the pipes entering it are located at a considerable distance from the bottom. This makes it possible to periodically clean the well from sediments accumulated at its bottom and allows the well to fill with wastewater. From the collection tank, water can be pumped out by a pump or flow by gravity to designated areas.

By creating a drainage system around the house according to all the rules, you will get rid of the harmful effects of excessive dampness affecting the foundation and recessed areas of the house.

The primary task of every owner of a private house is to protect his home from flooding by installing a drainage system around it. If you neglect this measure, the consequences can be disastrous - up to the destruction of the foundation and the appearance of cracks in the walls. Agree, it is much easier to prevent problems than to deal with them later. Moreover, you can even organize a protective system with your own hands. So that you do not fail in this matter, we suggest you learn more about the features, functions and types of drainage, as well as understand in detail how to properly install it around the house.

Purpose of the drainage system

Surely someone you know has experienced basement flooding, excessive moisture in walls, or deformation of ceilings and floors - these are direct consequences of the lack of a high-quality drainage system around the house. The bottom line is that melt and groundwater have an extremely detrimental effect on various structural elements of the home: they provoke the emergence of all kinds of fungi and gradually destroy the foundation. And the only way to avoid such negative phenomena is to organize good drainage, which will remove excess moisture from the house.

Drainage is an extensive engineering system consisting of interconnected trenches, pipes and a well in which water accumulates. Its installation is mandatory in the following cases:

the floors are located on a base that is grounded to a depth of less than 13 cm;
the basement and communication channels are located at a height of less than 50 cm in relation to groundwater;
the house was built on clay or loamy soil;
groundwater is too high.

Wall drainage

Types of drainage

Based on the method of arrangement, there are two main types of drainage: wall and ring.

A wall drainage system is recommended for those private houses where there are basements, basements or any technical rooms. It is laid around the base of the building at a distance of 3 m from the walls. The recommended drainage depth is at least 50 cm from the lowest point of the foundation. Due to such a depth, it is advisable to install the wall system during the construction of the foundation - at the stage when the base pit has not yet been completely filled. Otherwise, you will need to dig a deep trench again, which will entail extra cash investments and labor costs.

The ring system is suitable for houses without plinths and basements. It is laid with a slight distance from the walls - 1.5-3 m. Recommended depth - 30 cm from the lowest point of the foundation. The ring system is easier to implement and can be installed both during construction and after the home has been put into operation. Drainage is the best option for protecting a house located on difficult clay soil.

Despite some functional differences, both types of drainage have approximately the same installation pattern. It includes two main stages: preparatory work and installation itself.

Preparing to install drainage

Before starting to organize the drainage system, it is necessary to properly protect the base of the house: treat the outside of the foundation with a bitumen primer, apply bitumen mastic on top, lay a regular painting or reinforced mesh on the new layer and cover it with an additional ball of mastic.

Next, dig a 40 cm wide trench around the house. Its depth will directly depend on the type of drainage. Create a uniform slope in the trench to drain water: gradually add sand, regularly measuring height differences with a laser level. You can alternate a layer of fine and coarse sand. The slope is necessary to ensure the unhindered flow of collecting water into a collection ditch or general drain. Keep in mind that the water collection area should be located at some distance from the home.

Advice. To calculate the slope, measure the distance from the drain point to the top of the trench - the required slope will be 1% of the obtained figure.

After this, lay a geotextile fabric on the sand and cover it with a 15 cm layer of well-washed gravel, maintaining the required slope. At the end of the preparatory stage, make depressions in the gravel for installing drainage pipes.

Drainage system design

Now you can begin organizing the drainage system. This stage includes the following steps:

Drainage system arrangement diagram

Install drainage pipes - use perforated polyvinyl chloride products. The perforation holes should be smaller than the size of the gravel used to avoid clogging. Lay pipes with a mandatory slope towards the drain, equal to 2% of the total length of the system. To adjust the uniformity of the slope, stretch a cord or rope along the equipped pipeline.

Advice. If you wish, you can make drainage pipes yourself: just make holes of the required diameter in the walls of ordinary PVC sewer pipes.

Connect the pipes securely to each other.
Install one vertical pipe with a tight-fitting top cap at each turn of the pipeline and connect horizontal PVC products to it. These vertical pipes are needed to clear blockages in the system.
Install a collector well in the area where all drainage pipes connect. You can either use a ready-made plastic device or build the device yourself from reinforced concrete rings. In this case, the bottom of the well must be concrete in any case. The top of the device should be closed with a cast iron hatch.
Bring the finished drainage system to the drain - a regular drain or a special collection well.
Cover the pipes with geotextile fabric, securing it with nylon rope or polypropylene tape. Lay 15 cm of washed gravel on top, and then cover the geotextile again, but with a slight overlap. And finally, cover the resulting structure with coarse sand.

We think you are convinced that installing a drainage system around a private house yourself is an absolutely doable task even for a non-professional. The main thing in this matter is to decide on the type of drainage and strictly adhere to the rules for its construction. Remember that by making an effort once, you will save yourself from many problems in the future and forget about the risk of flooding your home.

How to make drainage around the house: video

Drainage around the house: photo

Water has destructive power, so drainage around the house should be a priority for the owner of a private building. If the walls begin to become damp or stains of mold are visible on them, and puddles appear in the basement, it means that the process of destruction of the building has already begun. The consequence of this is horrific cracks and distortions of doors and windows. It is possible to create a reliable waterproofing system yourself, although it can be quite a complex process. But the result will be that the drainage around the house and the blind area will successfully complement each other, and will also create reliable protection of housing from destruction

The Importance of Planning

There are several common reasons why rain and melt water accumulates at the base of buildings. Much depends on:

As a result, intense flows regularly wash away the foundation. As snow deposits thaw, groundwater rises and the soil begins to subside. You simply cannot do without a good drainage system.

However, before making drainage around the house, you need to consider the following points:

All this preparation will end with a carefully designed waterproofing system. It is necessary to mark the places where inspection and storage wells will be located. Calculate the amount of consumables:

This will require various tools. These include several types of shovels: bayonet and shovel. You will need to remove excess soil with a wheelbarrow, and use a hammer drill to make holes. A pickaxe, a stationery knife and other accessories will not interfere with the master.

Step-by-step instructions for constructing a drainage system

There are several options for installing these drainage systems. Some people dig regular ditches around the perimeter of the building.
They are reinforced with boards or other material. The disadvantage of such structures is that they spoil the entire interior of the site and quickly become unusable.

Storm drains (surface drainage around the house) are installed at a certain slope to the base. They consist of pipes, the upper part of which is presented in the form of a lattice, trapping debris. Instead, special gutters or trays can be used.
Unnecessary moisture will fall into them and flow to the designated place. This drainage is ideal for regions with a humid climate, where it rains very often and there is a lot of snow.

Backfill waterproofing is recognized as the most durable and reliable. Each type of house foundation has its own scheme for installing such drainage. For example, before pouring the slabs, the drainage system must already be laid. Otherwise, you'll have to tinker a little. This does not apply to strip and pile supports.

Preparation

It all starts with excavating the foundation of the building. The slabs must be thoroughly cleaned of dirt and building materials. They must dry thoroughly. Then process the outer part of this wall in this way:

prime with bitumen-kerosene agent;
apply bitumen-based mastic;
Attach a mesh for putty to the still wet surface (division of 2 mm);
Apply the next layer of coating material 24 hours after the previous one has dried.

Finally, it is recommended to smooth out any uneven surfaces with sandpaper to make the surface smooth. When everything is prepared, you can begin the main process.

Trench dimensions

A pre-designed site plan, even the most primitive one, will help to correctly mark the territory and use material economically. The foundation drainage system includes a system of properly dug trenches and securely laid pipes. Trenches must meet the following parameters:

the distance from the foundation is not less than a meter or 1.5 m;
the width is calculated as follows: add 20 cm to the pipe diameter;
depth 50 cm below the foundation of the building;
the slope increases towards the place where the liquid is collected (1 cm every meter).

Plastic, asbestos-cement and ceramic pipes are successfully used in the installation of drainage systems. Manufacturers produce polymer versions of these items, which are covered with a special shell. This non-woven filter fabric protects containers from the formation of sludge.

To make the desired slope, you need to add sand. After this, use a special device to compact the dug ditch and fill it with a 10-centimeter layer of sand mixture. Compact the bottom again, checking the level of inclination.

Pipeline laying

When the trenches are ready, they need to be tightly covered with geotextile material. Each side cut should protrude 30 cm or more, depending on the width of the trench. Pour large-caliber crushed stone/gravel onto the canvas, adjusting it to the slope of the ditch. Laying a drainage pipeline around the house is as follows:

To prevent leaks at the pipe junction, winding is used. Several layers of insulation tape are the key to the tightness of the system.

All these plastic channels must be connected to the main pipe, which carries moisture to the water intakes. Then use river sand to fill the volume of the trenches. Pour the remaining soil on top of it until a good mound is formed. Under the influence of external factors, the land will still sag. As a result, such an embankment will be level with the horizon without the formation of a depression.

During this work, you need to constantly check the selected slope. To do this, you can stretch a cord or rope along the house in advance, which will serve as a level.

Water intakes/wells

To prevent water from accumulating in the drainage under the house, it should be removed. This can be done using special wells. Moreover, they are needed to systematically clean the structure and regularly maintain the system. All excess moisture is collected in these wells, which should be located at a distance of 5 m from the building. They are installed below the sewer pipe (1 m), but not at the same level with groundwater.
Modern designs show that there should be four such water intakes on the site, at each corner of the task.

According to the standards, for drainage systems there are 4 inspection wells, and two are drainage wells. One is assigned to the storm drain.

The well located at the lowest point will be deeper than all the others. Its diameter depends on the size of the container installed in it:

plastic tank;
welded structures;
reinforced concrete rings;
ebb structures.

Line the bottom of the hole with geotextile material, and then attach the container to the ground so that it does not move in case of landslides. Fill the voids with gravel mixed with soil.

In some cases, DIY drainage around your home requires additional costs. The receiving point can be placed an order of magnitude higher than the sewer pipes, then a pumping unit is needed. Sometimes the pipeline does not lie deep enough, so you will need to lay a heating cable.

If you ask any experienced builder, developer, or landscape designer about what needs to be done, first of all, on a newly acquired and not yet developed plot, the answer will be unequivocal: the first thing is drainage, if there is a need for it. And such a need almost always happens. Drainage of a site is always associated with a very large volume of excavation work, so it is better to do it right away, so as not to disturb the beautiful landscape that any good owners arrange on their property.

Of course, the easiest way is to order site drainage services from specialists who will do everything quickly and correctly, using special equipment. However, this will always come at a cost. Perhaps the owners did not plan for these expenses; perhaps they will violate the entire budget planned for the construction and improvement of the site. In this article, we propose to consider the question of how to do the drainage of a site with your own hands, as this will allow you to save a lot of money, and in most cases it is quite possible to do this work yourself.

Why is site drainage needed?

Looking through estimates and price lists related to site drainage, some developers begin to doubt the feasibility of these measures. And the main argument is that before, in principle, no one “bothered” much with this. With this argument for refusing to drain the site, it is worth noting that the quality and comfort of human life has greatly improved. No one wants to live in dampness or in a house with earthen floors. No one wants to see cracks on their home, blind areas and paths that appear after another cold season. All homeowners want to improve their property or, to put it in a modern and fashionable way, to do a landscape design. After the rain, no one wants to “knead mud” in stagnant puddles. If this is the case, then drainage is definitely needed. You can do without it only in very rare cases. We will explain in what cases a little later.

Drainage? No, I haven't heard...

Drainage is nothing more than the removal of excess water from the surface of a site or from the depths of the soil. Why is site drainage needed?

First of all, in order to remove excess water from the foundations of buildings and structures. The appearance of water in the area of the base of the foundation can provoke either soil movement - the house will “float”, which is typical for clay soils, or in combination with freezing, frost heaving forces may appear, which will create efforts to “squeeze” the house out of the ground.

Drainage is designed to remove water from basements and basements. No matter how effective the waterproofing is, excess water will still seep through the building structures. Basements in homes without drainage can become damp, which can encourage the growth of mold and other fungi. In addition, precipitation in combination with salts present in the soil very often form aggressive chemical compounds that negatively affect building materials.

Drainage will prevent the septic tank from being “squeezed out” when the groundwater level is high. Without drainage, a wastewater treatment system will not last long.
Drainage together with the system and around buildings ensures rapid removal of water, preventing its seepage to the underground parts of buildings.
Drainage prevents the soil from becoming waterlogged. In areas equipped with properly planned and constructed drainage, water will not stagnate.
Waterlogged soil can cause plant roots to rot. Drainage prevents this and creates conditions for the growth of all garden, vegetable and ornamental plants.
With heavy rainfall in areas that have a slope, the fertile layer of soil can be washed away by streams of water. Drainage directs water flows into the drainage system, thereby preventing soil erosion.

Water erosion of fertile soil in the absence of drainage is a serious problem in agriculture

If the site is surrounded by a fence built on a strip foundation, then it can “seal” natural water drainage routes, creating conditions for waterlogging of the soil. Drainage is designed to remove excess water from the perimeter of the site.
Drainage allows you to avoid the formation of puddles on platforms, sidewalks and garden paths.

When drainage is necessary anyway

Let's consider those cases when drainage is needed in any case:

If the site is located on flat terrain, then drainage is required, since if there is a large amount of precipitation or snow melts, the water will simply have nowhere to go. According to the laws of physics, water always goes under the influence of gravity to a lower place, and on a flat landscape it will intensively saturate the soil in a downward direction, which can lead to waterlogging. So, from a drainage point of view, it is beneficial for the site to have a slight slope.
If the site is located in a lowland, then drainage is definitely needed, since water will flow from higher places to those located below.
Areas with a strong slope also require drainage, since quickly flowing water will erode the top fertile layers of the soil. It is better to direct these flows into drainage channels or pipes. Then the bulk of the water will flow through them, preventing the soil layer from being washed away.
If the site is dominated by clay and heavy loamy soils, then after precipitation or melting snow, water will often stagnate on them. Such soils prevent its penetration into the deeper layers. Therefore, drainage is required.
If the groundwater level (GWL) in the area is less than 1 meter, then drainage cannot be avoided.

If the buildings on the site have a deeply buried foundation, then there is a high probability that its base will be in the zone of seasonal rise of groundwater. Therefore, it is necessary to plan drainage at the stage of foundation work.
If a significant part of the site area is covered with artificial surfaces made of concrete, paving stones or paving slabs, and also if there are lawns equipped with an automatic watering system, then drainage is also needed.

From this impressive list, it becomes clear that drainage to one degree or another is necessary in most cases. But before planning and doing it, you need to study the site.

Studying the site for topography, soil type and groundwater level

Each site is individual in terms of topography, soil composition and groundwater level. Even two areas located nearby can be very different from each other, although there will still be a lot in common between them. Modern construction requirements suggest that the design of a house should begin only after geological and geodetic surveys have been carried out with the preparation of special reports, which will contain a lot of data, most of which is understandable only to specialists. If we “translate” them into the language of ordinary citizens who do not have an education in the field of geology, hydrogeology and geodesy, then they can be listed as follows:

Topographic survey of the area where it is proposed. The photographs must indicate the cadastral boundaries of the site.
Characteristics of the relief, which should indicate what type of relief is present on the site (undulating or flat). If there are slopes, then their presence and direction are indicated; it is in their direction that the water will flow. Attached is a topographic plan of the site indicating the relief contours.

Characteristics of the soil, what type of soil it is and at what depth it lies on the site. To do this, specialists drill exploration wells in different places on the site, from where they take samples, which are then examined in the laboratory.
Physico-chemical properties of soil. Its ability to be load-bearing for the planned house, as well as as soil in combination with water, will affect concrete, metal and other building materials.
The presence and depth of groundwater, their seasonal fluctuations, taking into account exploration, archival and analytical data. It is also indicated in which soils water can appear and how they will affect the planned building structures.

The degree of soil heaving, the possibility of landslides, subsidence, flooding and swelling.

The result of all these studies should be recommendations on the design and depth of the foundation, the degree of waterproofing, insulation, protection from aggressive chemical compounds, and drainage. It happens that on a seemingly impeccable plot of land, specialists will not allow you to build the house that the owners intended. For example, a house with a basement was planned, and the high ground level forces experts to recommend against doing this, so instead of the originally planned strip foundation with a basement, they will recommend a pile foundation without underground premises. There is no reason not to trust these studies and specialists, since they have indisputable tools in their hands - measurements, drilling, laboratory experiments, statistics and calculations.

Of course, geological and geodetic surveys are not done for free, they are done at the expense of the developer and are required on a new site. This fact is often the subject of indignation by some owners, but it is worth understanding that this procedure will help save a lot of money during the construction and further operation of the house, as well as in maintaining the site in good condition. Therefore, this seemingly unnecessary and expensive bureaucracy is necessary and very useful.

If a plot of land is purchased with existing buildings that have been in use for at least several years, then you can also order geological and geodetic surveys, but you can do without them and learn about groundwater, its seasonal rise and the unpleasant impact on human life based on other signs. Of course, this will come with a certain amount of risk, but in most cases it works. What you should pay attention to?

First of all, this is communication with the former owners of the site. It is clear that it is not always in their interests to talk in detail about problems with flooding, but, nevertheless, you can always find out whether any drainage measures have been taken. They will not hide this for anything.
An inspection of the basement can also tell a lot. Regardless of whether cosmetic repairs were made there. If there is a high level of humidity in the premises, it will be immediately felt.

Getting to know your neighbors and interviewing them can be much more informative than communicating with the former owners of the property and house.
If there are wells or boreholes on your property and on your neighbors’ property, then the water level in them will eloquently indicate the groundwater level. Moreover, it is advisable to observe how the level changes in different seasons. Theoretically, the water should rise to its maximum in the spring after the snow has melted. In summer, if there have been dry periods, the groundwater level should drop.
Plants growing on a site can also “tell” a lot to the owner. The presence of plants such as cattail, reed, sedge, horse sorrel, nettle, hemlock, and foxglove indicate that groundwater is at a level of no more than 2.5-3 meters. If even during a drought these plants continue their rapid growth, this once again indicates the proximity of water. If licorice or wormwood grow on the site, then this is evidence that the water is at a safe depth.

Some sources talk about an ancient method of determining the groundwater level that our ancestors used before building a house. To do this, a piece of turf was removed from the area of interest and a shallow hole was dug, a piece of wool was placed at the bottom, an egg was placed on it, and an inverted clay pot and the removed turf were covered on top. After dawn and sunrise, they removed the pot and watched as the dew fell. If the egg and wool are covered in dew, then the water is shallow. If dew has fallen only on the wool, then there is water, but it is at a safe depth. If both the egg and the wool are dry, then the water is very deep. It may seem that this method is akin to quackery or shamanism, but in fact there is an absolutely correct explanation for it, from the point of view of science.
The growth of bright grass in the area even during a drought, as well as the appearance of fog in the evening hours, indicates the proximity of groundwater.
The best way to independently determine groundwater level on a site is to drill test wells. To do this, you can use a regular garden auger with extensions. It is better to drill during the highest water rise, that is, in the spring after the snow melts. First of all, wells should be made at the site of construction of a house or an existing structure. The well must be drilled to the depth of the foundation plus 50 cm. If water begins to appear in the well immediately or after 1-2 days, this indicates that drainage measures are required.

A beginner's research geologist's kit - a garden auger with an extension cord

If puddles stagnate in the area after rain, this may indicate the proximity of groundwater, as well as the fact that the soil is clayey or heavy loamy, which prevents water from going deeper normally. In this case, drainage is also necessary. It will also be very useful to replace the fertile soil with a lighter one, then there will be no problems with growing most garden and garden plants.

Even a very high groundwater level in the area, although a big problem, is a problem that can be solved with the help of well-calculated and well-executed drainage. Let's give a good example - more than half of the territory of Holland lies below sea level, including the capital - the famous Amsterdam. The groundwater level in this country can be several centimeters deep. Those who have been to Holland have noticed that after rain there are puddles there that are not absorbed into the ground, since there is simply nowhere for them to be absorbed. However, in this cozy country, the issue of land drainage is being resolved through a set of measures: dams, dikes, polders, locks, and canals. In Holland there is even a special department, Waterschap, which deals with flood protection. The abundance of windmills in this country does not mean that they grind grain. Most mills are involved in pumping water.

We do not at all encourage you to specifically purchase a site with a high groundwater level; on the contrary, this should be avoided by all possible means. And the example of Holland was cited only so that readers could understand that there is a solution to any problem with groundwater. Moreover, in most of the territory of the former USSR, settlements and holiday villages are located in areas where groundwater levels are within acceptable limits, and seasonal rises can be dealt with independently.

Types of drainage systems

There are a great variety of drainage systems and their varieties. Moreover, in different sources, their classification systems may differ from each other. We will try to talk about the simplest, from a technical point of view, drainage systems, but at the same time effective, which will help solve the problem of removing excess water from the site. Another argument in favor of simplicity is that the fewer elements any system has and the more time it can operate without human intervention, the more reliable it will be.

Surface drainage

This type of drainage is the simplest, but nevertheless quite effective. It is intended mainly for draining water coming in the form of precipitation or melting snow, as well as for draining excess water during any technological processes, for example, when washing cars or garden paths. Surface drainage is done in any case around buildings or other structures, areas, exit points from a garage or yard. Surface drainage comes in two main types:

Point drainage designed to collect and drain water from a specific place. This type of drainage is also called local drainage. The main locations for point drainage are under roof gutters, in pits in front of doors and garage doors, and in locations where irrigation taps are located. In addition to its direct purpose, point drainage can complement another type of surface drainage system.

Storm water inlet is the main element of point surface drainage

Linear drainage needed to remove water from a larger area compared to a single point. It represents a collection trays And channels, mounted with a slope, equipped with various elements: sand traps (sand traps), protective grilles , performing filtering, protective and decorative functions. Trays and channels can be made from a variety of materials. First of all, it is plastic in the form of polyvinyl chloride (PVC), polypropylene (PP), and low-density polyethylene (HDPE). Materials such as concrete or polymer concrete are also widely used. Grates are most often used in plastic, but in areas where increased load is expected, products made of stainless steel or even cast iron can be used. Work on organizing linear drainage requires concrete preparation of the base.

It is obvious that any good surface drainage system almost always combines elements of point and linear. And all of them are combined into a common drainage system, which may also include another subsystem, which we will consider in the next section of our article.

Prices for rainwater inlets

storm drain

Deep drainage

In most cases, surface drainage alone cannot be done. To solve the problem qualitatively, we need another type of drainage - deep, which is a system of special drainage pipes (drains) , laid in those places where it is necessary to lower the groundwater level or divert water from the protected area. Drains are laid with a slope to the side collector, well , artificial or natural reservoir on the site or beyond. Naturally, they are laid below the level of the base of the foundation of the protected building or along the perimeter of the site at a depth of 0.8-1.5 meters to lower the groundwater level to non-critical values. Drains can also be laid in the middle of the site at a certain interval, which is calculated by specialists. Typically, the interval between pipes is 10-20 meters, and they are laid in the form of a herringbone, directed towards the main outlet pipe-collector. It all depends on the groundwater level and its quantity.

When laying drains in trenches, it is imperative to take advantage of all the features of the site’s topography. Water will always flow from a higher place to a lower place, so drains are laid the same way. It is much more difficult if the area is absolutely flat, then the required slope is given to the pipes by adding a certain level to the bottom of the trenches. It is customary to make a slope of 2 cm per 1 meter of pipe for clay and loamy soils and 3 cm per 1 meter for sandy soils. Obviously, with sufficiently long drains, it will be difficult to maintain the required slope on a flat area, since for 10 meters of pipe the level difference will already be 20 or 30 cm, so a necessary measure is to organize several drainage wells that will be able to receive the required volume of water.

It should be noted that even with a smaller slope, water, even at 1 cm per 1 meter or less, will still, obeying the laws of physics, try to go lower, but the flow rate will be less, and this can contribute to silting and clogging of drains. And any owner who has laid sewer or drainage pipes at least once in his life knows that maintaining a very small slope is much more difficult than a large one. Therefore, you should not be “embarrassed” in this matter and feel free to set a slope of 3, 4 and even 5 cm per meter of drainage pipe, if the length and planned difference in depth of the trench allows.

Drainage wells are one of the most important components of deep drainage. They can be of three main types:

Rotary wells – arranged where drains make a turn or where several elements are connected. These elements are needed for inspection and cleaning of the drainage system, which must be done periodically. They can be either small in diameter, which will only allow cleaning and rinsing with a stream of water under pressure, but they can also be wide, which provide human access.

Water intake wells – their purpose is absolutely clear from their name. In those areas where there is no possibility of draining water deeper or beyond, it becomes necessary to collect water. This is exactly what these wells are designed for. Previously, they were mainly a structure made of monolithic concrete, concrete rings or bricks plastered with cement mortar. Nowadays, plastic containers of various sizes are most often used, which are protected from clogging or silting by geotextiles and crushed stone or gravel. The water collected in the water intake well can be pumped outside the site using special submersible drainage pumps, can be pumped out and transported by tanker trucks, or can settle in a well or pool for further irrigation.

Absorption wells are designed to drain water if the topography of the site does not allow moisture to be removed beyond its boundaries, but the underlying soil layers have good absorption capacity. Such soils include sandy and sandy loam. Such wells are made with large diameters (about 1.5 meters) and depths (at least 2 meters). The well is filled with filter material in the form of sand, sand-gravel mixture, crushed stone, gravel, broken brick or slag. To prevent eroded fertile soil or various blockages from entering from above, the well is also covered with fertile soil. Naturally, the side walls and bottom are protected with sprinkling. Water entering such a well is filtered by its contents and goes deep into sandy or sandy loam soils. The ability of such wells to remove water from the site may be limited, so they are installed when the expected throughput should not exceed 1-1.5 m 3 per day.

Of the drainage systems, the main and most important is deep drainage, since it is it that provides the necessary water regime for both the site and all the buildings located on it. Any mistake in the design and installation of deep drainage can lead to very unpleasant consequences, which can lead to the death of plants, flooding of basements, destruction of house foundations, and uneven drainage of the area. That is why it is recommended not to neglect geological and geodetic research and order a drainage system design from specialists. If it is possible to correct flaws in surface drainage without severely disturbing the landscape of the site, then with deep drainage everything is much more serious, the cost of an error is too high.

Well prices

Overview of components for drainage systems

To independently carry out the drainage of the site and the buildings located on it, you need to find out what components will be required for this. From the widest selection of them, we tried to show the most used ones at present. If previously the market was dominated by Western manufacturers, who, as monopolists, dictated high prices for their products, now a sufficient number of domestic enterprises offer their products, which are in no way inferior in quality.

Surface Drainage Parts

The following parts can be used for point and linear surface drainage:

Name, manufacturer	Purpose and description
Concrete drainage tray 1000140125 mm with stamped galvanized steel grate. Production - Russia.	Designed for surface water drainage. Capacity 4.18 l/sec, can withstand loads of up to 1.5 tons (A15).	880 rub.
Concrete drainage tray with cast iron grate, dimensions 1000140125 mm. Production - Russia.	The purpose and capacity are the same as in the previous example. Capable of supporting loads up to 25 tons (C250).	1480 rub.
Concrete drainage tray with galvanized steel mesh grating, dimensions 1000140125 mm. Production - Russia.	The purpose and capacity are the same. Capable of supporting loads up to 12.5 tons (B125).	1610 rub.
Polymer concrete drainage tray 100014070 mm with a plastic grid. Production - Russia.	The purpose is the same, throughput 1.9 l/sec. Capable of withstanding loads up to 1.5 tons (A15). The material combines the advantages of plastic and concrete.	820 rub.
Polymer concrete drainage tray 100014070 mm with cast iron grate. Production - Russia.	The throughput is the same. Capable of withstanding up to 25 tons of load (C250).	1420 rub.
Polymer concrete drainage tray 100014070 mm with steel mesh grating. Production - Russia.	The throughput is the same. Capable of withstanding up to 12.5 tons of load (B125).	1550 rub.
Plastic drainage tray 100014560 mm with a galvanized stamped grid. Production - Russia.	Made from frost-resistant polypropylene. Flow rate 1.8 l/sec. Capable of withstanding loads up to 1.5 tons (A15).	760 rub.
Plastic drainage tray 100014560 mm with cast iron grate. Production - Russia.	Flow rate 1.8 l/sec. Capable of supporting loads up to 25 tons (C250).	1360 rub.
Complete plastic storm water inlet (siphon-partitions 2 pcs., waste basket – 1 pc.). Size 300300300 mm. With plastic grille. Production - Russia.	Designed for point drainage of water flowing from the roof through a drainpipe, and can also be used to collect water under yard and garden watering taps. Can be connected to shaped parts with diameters of 75, 110, 160 mm. Removable basket allows for quick cleaning. Withstands loads up to 1.5 tons (A15).	For a set including siphon partitions, a waste collection basket and a plastic grill - 1000 rubles.
Complete plastic storm water inlet (siphon-partitions 2 pcs., waste basket – 1 pc.). Size 300300300 mm. With cast iron grate “Snowflake”. Production - Russia.	The purpose is similar to the previous one. Withstands loads up to 25 tons (C250).	For a set including siphon partitions, a waste collection basket and a cast iron grate - 1,550 rubles.
The sand trap is plastic with a galvanized steel grid. Dimensions 500116320 mm.	Designed to collect dirt and debris in surface linear drainage systems. It is installed at the end of a line of gutters (trays) and is subsequently connected to the pipes of the storm sewer system with a diameter of 110 mm. Capable of withstanding loads up to 1.5 tons (A15).	For a set including grilles 975 rubles.

In the table, we deliberately showed Russian-made gutters and rainwater inlets, made from materials that differ from each other and have different configurations. It is also worth noting that the trays have different widths and depths and, accordingly, their throughput is also not the same. There are a lot of options for the materials from which they are made and sizes; there is no need to list them all, since it depends on many factors: the required throughput, the expected load on the ground, the specific implementation scheme of the drainage system. That is why it is best to entrust drainage system calculations to specialists who will calculate the required size, quantity, and select components.

There was absolutely no need to talk about possible components for drainage trays, rain inlets and sand traps in the table, since in each individual case they will be different. When purchasing, if there is a system design, the seller will always suggest the ones you need. They can be end caps for trays, fastenings for gratings, various corner and transition elements, reinforcing profiles and others.

A few words should be said about sand traps and storm water inlets. If surface linear drainage around the house is implemented with rainwater inlets in the corners (and this is usually done), then sand traps will not be required. Stormwater inlets with siphon partitions and waste baskets perform their role perfectly. If the linear drainage does not have storm inlets and goes into a sewer drainage pipe, then a sand trap is required. That is, any transition from drainage trays to pipes must be done either using a storm inlet or a sand trap. Only this way and no other way! This is done to ensure that sand and various heavy debris do not get into the pipes, as this can lead to their rapid wear, and over time both they and the drainage wells will become clogged. It is difficult to disagree with the fact that it is easier to periodically remove and wash the baskets while on the surface than to go down into the wells.

Surface drainage also includes wells and pipes, but they will be discussed in the next section, since, in principle, they are the same for both types of systems.

Details for deep drainage

Deep drainage is a more complex engineering system that requires more details. In the table we present only the main ones, since all their diversity will take up a lot of space and attention of our readers. If you wish, it will not be difficult to find catalogs of manufacturers of these systems and select the necessary parts and components for them.

Name and manufacturer	Purpose and description	Approximate price (as of October 2016)
Drainage pipe with a diameter of 63 mm made of HDPE, corrugated, single-walled, in a geotextile filter. Manufacturer: Sibur, Russia.	Designed to remove excess moisture from foundations and areas. Wrapped with geotextile to prevent clogging of pores with soil and sand, which prevents clogging and silting. They have full (circular) perforation. Made from low-density polyethylene (HDPE). Hardness class SN-4. Laying depth up to 4 m.	For 1 m.p. 48 rub.
Drainage pipe with a diameter of 110 mm made of HDPE, corrugated, single-walled, in a geotextile filter. Manufacturer: Sibur, Russia.	similar to above	For 1 m.p. 60 rub.
Drainage pipe with a diameter of 160 mm made of HDPE, corrugated, single-walled, in a geotextile filter. Manufacturer: Sibur, Russia.	similar to above	For 1 m.p. 115 rub.
Drainage pipe with a diameter of 200 mm made of HDPE, corrugated, single-walled, in a geotextile filter. Manufacturer: Sibur, Russia.	similar to above	For 1 m.p. 190 rub.
Single-wall corrugated HDPE drainage pipes with a coconut coir filter with diameters of 90, 110, 160, 200 mm. Country of origin: Russia.	Designed to remove excess moisture from foundations and areas on clay and peaty soils. Coconut coir has increased reclamation properties and strength compared to geotextiles. They have circular perforation. Hardness class SN-4. Laying depth up to 4 m.	219, 310, 744, 1074 rub. for 1 m.p. (depending on diameter).
Double-layer drainage pipes with a Typar SF-27 geotextile filter. The outer layer of HDPE is corrugated, the inner layer of LDPE is smooth. Diameters 110, 160, 200 mm. Country of origin: Russia.	Designed to remove excess moisture from foundations and areas on all types of soils. They have full (circular) perforation. The outer layer protects from mechanical influences, and the inner layer allows, due to its smooth surface, to remove a larger amount of water. The two-layer design has a stiffness class of SN-6 and allows pipes to be laid at a depth of up to 6 meters.	160, 240, 385 rub. for 1 m.p. (depending on diameter).
PVC pipes for sewerage are smooth with a socket with an outer diameter of 110, 125, 160, 200 mm, length 1061, 1072, 1086, 1106 mm, respectively. Country of origin: Russia.	Designed for organizing an external sewer system, as well as storm drainage or drainage systems. They have a hardness class of SN-4, which allows them to be laid at a depth of up to 4 meters.	180, 305, 270, 490 rub. for pipes: 1101061 mm, 1251072 mm, 1601086 mm, 2001106 mm, respectively.
Well shafts with a diameter of 340, 460, 695, 923 mm made of HDPE. Country of origin: Russia.	Designed to create drainage wells (rotary, water intake, absorption). They have a two-layer construction. Ring stiffness SN-4. Maximum length – 6 meters.	950, 1650, 3700, 7400 rub. for wells with diameters of 340, 460, 695, 923 mm, respectively.
Bottom-plug for wells with diameters of 340, 460, 695, 923 mm made of HDPE. Country of origin: Russia.	Designed for creating drainage wells: rotary or water intake.	940, 1560, 4140, 7100 for wells with diameters of 340, 460, 695, 923 mm, respectively.
Insertion into the well on site with diameters of 110, 160, 200 mm. Country of origin: Russia.	Designed for insertion into a well at any level of sewer or drainage pipes of appropriate diameters.	350, 750, 2750 rub. for inserts with diameters of 110, 160, 200 mm, respectively.
Polymer concrete hatch for drainage wells with a diameter of 340 mm. Country of origin: Russia.		500 rub.
Polymer concrete hatch for drainage wells with a diameter of 460 mm. Country of origin: Russia.	Designed for installation on drainage wells. Withstands loads of up to 1.5 tons.	850 rub.
Polyester geotextile with a density of 100 g/m². Country of origin: Russia.	Used to create drainage systems. Not susceptible to rotting, mold, rodents and insects. Roll length from 1 to 6 m.	20 rub. for 1 m².

From the presented table it can be seen that the cost of even Russian-made parts for drainage systems can hardly be called cheap. But the effect of their use will please the owners of the site for at least 50 years. This is the service life that the manufacturer claims. Considering that the material used to make drainage parts is absolutely inert with respect to all substances found in nature, we can assume that the service life will be much longer than stated.

We deliberately did not include previously widely used asbestos-cement or ceramic pipes in the table, since apart from high prices and difficulties in transportation and installation, they will not bring anything. This is yesterday's century.

To create drainage systems, there are many more components from various manufacturers. These include tray parts, which can be throughput, connecting, prefabricated and dead-end. They are designed to connect drainage pipes of various diameters to wells. They provide drainage pipe connections at different angles.

Despite all the obvious advantages of tray parts with pipe sockets, their price is very high. For example, the part shown in the figure above costs 7 thousand rubles. Therefore, in most cases, the taps into the well indicated in the table are used. Another advantage of cut-ins is that they can be made at any level and at any angle to each other.

In addition to those parts for drainage systems that are indicated in the table, there are many others that are selected according to calculations and during installation on site. These may include various cuffs and O-rings, couplings, tees and crosses, check valves for drainage and sewer pipes, eccentric transitions and necks, bends, plugs and much more. Their correct selection should be done, first of all, during design, and then adjustments should be made during installation.

Video: How to choose a drainage pipe

Video: Drainage wells

If readers find articles on drainage on the Internet that say that it is easy to make drainage with your own hands, then we advise you to immediately close this article without reading it. Making drainage with your own hands is not an easy task. But the main thing is that this is possible if you do everything consistently and correctly.

Design of the site drainage system

The drainage system is a complex engineering object that requires appropriate treatment. Therefore, we recommend that our readers order site drainage design from professionals who will take into account absolutely everything: the topography of the site, existing (or planned) buildings, soil composition, groundwater depth, and other factors. After design, the customer will have a set of documents on hand, which includes:

Plan of the site with its relief.
A diagram for laying pipes for wall or ring drainage, indicating the cross-section and type of pipes, depth, required slopes, and location of wells.
A drainage diagram of the site also indicating the depth of the trenches, types of pipes, slopes, distance between adjacent drains, location of rotary or water intake wells.

It will be difficult to make a detailed design of a drainage system on your own without knowledge and experience. This is why you should turn to professionals

A diagram of surface point and linear drainage indicating the size of trays, sand traps, storm water inlets, sewer pipes used, and the location of water intake wells.
Transverse dimensions of trenches for wall and deep drainage, indicating the depth, material and thickness of the filling, and the type of geotextile used.
Calculation of necessary components and materials.
Explanatory note for the project, describing the entire drainage system and technology for performing the work.

The design of a site drainage system costs significantly less than an architectural design, so we once again strongly advise you to contact specialists. This minimizes the likelihood of errors when installing drainage yourself.

Home wall drainage equipment

To protect the foundations of houses from the effects of groundwater, so-called wall drainage is made, which is located around the entire house from the outside at some distance from the base of the foundation. usually it is 0.3-0.5 m, but in any case no more than 1 meter. Wall drainage is done at the stage of building a house along with measures for insulation and waterproofing of the foundation. When is this type of drainage necessary anyway?

Prices for drainage systems

When the house has a ground floor.

When the buried parts of the foundation are located no more than 0.5 meters above the groundwater level.
When a house is built on clay or loamy soils.

All modern house designs almost always include wall drainage. The only exceptions can be those cases when the foundation is laid on sandy soils that do not freeze more than 80 cm.

A typical wall drainage design is shown in the figure.

At some distance from the base of the foundation, approximately 30 cm below its level, a leveling layer of sand of 10 cm is made, on which a geotextile membrane with a density of at least 150 g/m² is laid, on which is poured a layer of crushed stone of a fraction of 20-40 mm with a thickness of at least 10 cm. Instead of crushed stone, washed gravel can be used. It is better to use granite crushed stone, but not limestone, since the latter tends to be gradually eroded by water. A drainage pipe wrapped in geotextile is laid on a crushed stone bed. The pipes are given the required slope - at least 2 cm per 1 linear meter of pipe.

Inspection and inspection wells must be made at the places where the pipe turns. The rules allow them to be done every other turn, but practice suggests that it is better not to skimp on this and to place them at every turn. The slope of the pipes is made in one direction (in the figure from point K1, through points K2 and K3, to point K4). In this case, it is necessary to take into account the terrain. It is assumed that point K1 is at the highest point, and K4 at the lowest.

Drains are inserted into wells not from the very base, but with an indentation of at least 20 cm from the bottom. Then the small debris or silt that gets in will not linger in the pipes, but will settle in the well. Later, when inspecting the system, you can wash away the silty bottom with a strong stream of water, which will carry away everything unnecessary. If the soil in the area where the wells are located has good absorption capacity, then the bottom is not made. In all other cases, it is better to equip wells with a bottom.

A layer of crushed stone or washed gravel with a thickness of at least 20 cm is again poured over the drains, and then it is wrapped with a previously laid geotextile membrane. On top of such a “wrapped” structure from a drainage pipe and crushed stone, a backfill of sand is made, and on top, after compacting it, a blind area of the building is already organized, which is also intended to be used, but in a system of surface linear drainage. Even if atmospheric water enters from the outside of the foundation, after passing through the sand, it will enter the drains and through them will eventually flow into the main collector well, which can be equipped with a pump. If the terrain of the site allows, then an overflow without a pump is made from the collector well, removing water beyond the boundaries into a drainage ditch, an artificial or natural reservoir or a storm sewer system. Under no circumstances should drainage be connected to a regular sewer system.

If groundwater begins to “back up” from below, then it first of all saturates the sand preparation and crushed stone in which the drains are located. The speed of water movement through the drains is higher than in the ground, so the water is quickly removed and drained into a collector well, which is laid lower than the drains. It turns out that inside a closed loop of drainage pipes, water simply cannot rise above the level of the drains, which means both the base of the foundation and the floor in the basement will be dry.

This wall drainage scheme is very often used and works very effectively. But it has a significant drawback. This is backfilling the entire cavity between the foundation and the edge of the pit with sand. Considering the considerable volume of the sinus, you will have to pay a tidy sum for this filling. But there is a beautiful way out of this situation. To avoid backfilling with sand, you can use a special profiled geomembrane, which is a canvas made of HDPE or LDPE with various additives, having a relief surface in the form of small truncated cones. When the underground part of the foundation is covered with such a membrane, it performs two main functions.

The geomembrane itself is an excellent waterproofer. It prevents moisture from penetrating the walls of the underground foundation structure.
The textured surface of the membrane ensures that the water that appears on it flows freely downwards, where it will be “caught” by the installed drains.

The design of wall drainage using a geomembrane is shown in the following figure.

On the outer wall of the foundation, after installation and insulation (if necessary), a geomembrane is glued or mechanically fastened with the relief part (pimples) facing outwards. A geotextile fabric with a density of 150-200 g/m² is fixed on top of it, which will prevent clogging of the relief part of the geomembrane with soil particles. Further organization of drainage proceeds as usual: a drain lined with crushed stone and wrapped in geotextile is placed on a layer of sand. Only the sinuses are filled not with sand or crushed stone, but with ordinary soil taken out when digging a pit or with clay, which is significantly cheaper.

The drainage of water “propping up” the foundation from below proceeds as in the previous case. But water that enters the wall from the outside through moistened soil or penetrates into the gap between the foundation and the soil will follow the path of least resistance: seep through geotextiles, flow freely along the relief surface of the geomembrane, pass through crushed stone and end up in the drain. Foundations protected in this way will not be threatened for at least 30-50 years. The basement floors of such houses will always be dry.

Let's consider the main stages of creating a wall drainage system for a house.

Image	Description of actions
	After measures have been taken to construct the foundation, its initial coating, and then roll waterproofing and insulation, a geomembrane is glued to the outer wall of the foundation, including its base, using a special mastic that does not corrode polystyrene foam, with the relief part facing out. The upper part of the membrane should protrude beyond the level of the future backfill by at least 20 cm, and the lower part should reach the very bottom of the foundation, including the base.
	The joints of most geomembranes have a special lock that is “locked” by overlapping one sheet over the other and then tapping it with a rubber mallet.
	A geotextile fabric with a density of 150-200 g/m² is attached on top of the geomembrane. It is better to use thermally bonded geotextiles rather than needle-punched ones, since they are less susceptible to clogging. Disc-shaped dowels are used for fixation. The dowel fastening spacing is no more than 1 m horizontally and no more than 2 m vertically. The overlap of adjacent geotextile sheets on each other is at least 10-15 cm. Disc-shaped dowels should be located at the joint.
	At the top of the geomembrane and geotextile, it is recommended to use a special mounting strip, which will press both layers to the foundation structure.
	The bottom of the pit from the outside of the foundation is cleaned to the required level. The level can be controlled by a theodolite with a measuring bar, a laser level and a handy wooden bar with marked marks, tensioned and adjusted using a hydraulic level with a tensioned cord. You can also “beat off” a horizontal line on the wall and measure the depth using a tape measure.
	Washed sand is poured onto the bottom in a layer of at least 10 cm, which is moistened with water and compacted mechanically or manually until there are practically no traces left when walking.
	Inspection wells are installed in the designated locations. To do this, it is enough to use shafts with a diameter of 340 or 460 mm. Having measured the required length, they can be cut with a regular hacksaw, or a jigsaw, or a reciprocating saw. Initially, the wells must be cut 20-30 cm longer than the estimated length, and later, when designing the landscape, they must be adjusted to fit it.
	Bottoms are installed on wells. To do this, in single-layer wells (for example, Wavin), a rubber cuff is placed in the edge of the body, then it is lubricated with a soap solution and the bottom is installed. It should go in with force.
	In Russian-made two-layer wells, before installing the cuff, it is necessary to cut out a strip of the inner layer with a knife, and then do the same as in the previous case.
	The wells are installed in their intended places. The areas for their installation are compacted and leveled. On their side surfaces, marks are made for the entrance and exit of the drain centers (taking into account slopes of 2 cm per 1 linear meter of pipe). We remind you that the inlets and outlets of the drains must be at least 20 cm from the bottom.
	To make it easier to insert couplings, it is better to place the wells horizontally and make holes using a crown and a centering drill corresponding to the coupling. If you don't have a crown, you can make holes with a jigsaw, but this requires certain skills.
	After this, the edges are cleared of burrs with a knife or brush.
	The outer rubber sleeve of the coupling is placed inside the hole. It should go inside the well and stay outside equally (about 2 cm each).
	The inner surface of the rubber cuff of the coupling is lubricated with a soap solution, and then the plastic part is inserted until it stops. The junction of the rubber part of the coupling to the well can be coated with waterproof sealant.
	The wells are installed in their places and aligned vertically. Geotextiles are spread on a sand bed. Granite crushed stone of a fraction of 5-20 mm or washed gravel is poured onto it in a layer of at least 10 cm. The required slopes of the drainage pipes are taken into account. The crushed stone is leveled and compacted.
	Perforated drainage pipes of the required size are measured and cut. The pipes are inserted into couplings cut into the wells after lubricating the cuff with soapy water. Their bias is checked.
	A layer of crushed stone or gravel of at least 20 cm is poured on top of the drains. Then the edges of the geotextile fabric are wrapped on top of each other and sprinkled with a 20 cm layer of sand on top.
	In the designated location, a pit is dug for the collector well of the drainage system. Its level, naturally, must be below the lowest drain in order to receive water from the wall drainage. A trench is dug to this pit from the lower level inspection and inspection well for laying a sewer pipe.
	Shafts with diameters of 460, 695 and even 930 mm can be used as a collector well. A prefabricated well made of reinforced concrete rings can also be installed. Inserting a sewer pipe into a receiving collector well is done in exactly the same way as drains.
	The sewer pipe leading from the lower level of the wall drainage well to the collector well is laid on a 10 cm sand cushion and sprinkled with sand of at least 10 cm thickness on top. After compacting the sand, the trench is filled with soil.
	The system is checked for functionality. To do this, water is poured into the highest level well. After filling the bottom, water should begin to flow through the drains into other wells and, after filling their bottoms, eventually flow into the collector well. There should be no reverse current.
	After checking the functionality, the sinuses between the edge of the pit are filled with soil. It is preferable to use quarry clay for this, which will create a waterproof castle around the foundation.
	The wells are covered with lids to prevent clogging. Final trimming and installation of covers should be done in conjunction with landscaping work.

A collector drainage well can be equipped with a check valve, which, even if it overflows, does not allow water to flow back into the drains. And also in the well there can be an automatic one. When the groundwater level increases to critical values, water will collect in the well. The pump is configured so that when a certain level in the well is exceeded, it will turn on and pump water outside the site or into other containers or reservoirs. Thus, the groundwater level in the foundation area will always be lower than the laid drains.

It happens that one collector well is used for wall and surface drainage systems. Experts do not recommend doing this, since during intense snow melting or heavy rains, a very large amount of water will accumulate in a short time, which will only interfere with inspecting the water drainage system in the area of the foundation. It is better to collect water from precipitation and melted snow in separate containers and use it for irrigation. If storm wells overflow, water from them can be pumped to another location in the same way using a drainage pump.

Video: Wall drainage at home

House ring drainage equipment

Ring drainage, unlike wall drainage, is not located close to the foundation structure, but at some distance from it: from 2 to 10 meters or more meters. In what cases is ring drainage suitable?

If the house has already been built and any intervention in the foundation structure is undesirable.
If the house does not have a basement.
If a house or group of buildings is built on sandy or sandy loam soils that have good permeability to water.
If other types of drainage fail to cope with the seasonal rise of groundwater.

Regardless of the fact that ring drainage is much simpler in practical implementation, the attitude towards it should be more serious than towards wall drainage. Why?

A very important characteristic is the depth of the drains. In any case, the depth of the foundation must be greater than the depth of the base of the foundation or the level of the basement floor.
The distance from the foundation to the drain is also an important characteristic. The sandier the soil, the greater the distance should be. And vice versa - the more clay the soil, the closer the drains can be located to the foundation.
When calculating the ring foundation, the groundwater level, its seasonal fluctuations and the direction of its inflow are also taken into account.

Based on all of the above, we can safely say that it is better to entrust the calculation of ring drainage to specialists. It would seem that the closer the drain is to the house and the deeper it is laid, the better it will be for the structure being protected. It turns out not! Any drainage changes the hydrogeological situation in the area of the foundation, which is not always good. The task of drainage is not to completely dry the area, but to lower the groundwater level to such values that will not interfere with human and plant life. Drainage is a kind of agreement with the forces of Mother Nature, and not an attempt to “rewrite” existing laws.

One of the options for constructing a ring drainage system is shown in the figure.

It can be seen that around the house, already outside the blind area, a trench has been dug to such a depth that the upper part of the drainage pipe lies 30-50 cm below the bottom point of the foundation. The trench is lined with geotextile and the pipe itself is also encased in it. The minimum underlying layer of crushed stone must be at least 10 cm. The minimum slope of drains with a diameter of 110-200 mm is 2 cm per 1 linear meter of pipe. The picture shows that the entire trench is filled with rubble. This is completely acceptable and does not contradict anything other than common sense, in terms of unnecessary spending.

The diagram shows that the inspection and control wells are placed through one turn, which is quite acceptable if the drainage pipe is laid in one piece, without any fittings. But it’s still better to do them at every turn. This will make servicing the drainage system much easier over time.

A ring drainage system can “get along” perfectly with a surface point and linear drainage system. In one trench drains can be laid at the lower level, and next to them or on top in a layer of sand sewer pipes can be laid leading from trays and storm water inlets to a well for collecting rain and melt water. If the path of both leads to the same collector drainage well, then this is generally wonderful; the amount of excavation work is reduced significantly. Although, let us remind you that we recommended collecting these waters separately. They can be collected together only in one case - if all the water from precipitation and extracted from the ground is removed (naturally or forcibly) from the site into a collective storm sewer system, drainage ditch or reservoir.

When organizing ring drainage, a trench is first dug to the calculated depth. The width of the trench in the area of its bottom must be at least 40 cm; the bottom of the trench is immediately given a certain slope, the control of which is most convenient with a theodolite, and in its absence, a cord stretched horizontally and a measuring rod from available means will help.

Washed sand is poured onto the bottom in a layer of at least 10 cm, which is carefully compacted. Obviously, it is impossible to do this in a narrow trench using a mechanized method, so a manual tamper is used.

Installing wells, inserting couplings, adding crushed granite or gravel, laying and connecting drains is done in exactly the same way as when organizing wall drainage, so there is no point in repeating it. The difference is that with ring drainage, it is better to fill the trench after crushed stone and geotextiles not with soil, but with sand. Only the top fertile soil layer of approximately 10-15 cm is poured. Then, when landscaping the site, the places where drains are laid are taken into account and trees or shrubs with a strong root system are not planted in these places.

Video: Drainage around the house

Surface point and linear drainage equipment

As in all cases, a surface drainage system can only be successfully installed if there is a project or at least a self-made plan. On this plan, it is necessary to take into account everything - from water intake points to the container where rain and melt water will be drained. In this case, it is necessary to take into account the slopes of pipelines and trays, the direction of movement along the trays.

A surface drainage system can be installed on an existing blind area, paths made of paving slabs or paving stones. It is possible that some of their parts will have to be interfered with, but this still will not require complete dismantling. Let's consider an example of installing a surface drainage system using the example of polymer concrete trays and sand traps (sand traps) and sewer pipes.

To carry out the work you will need a very simple set of tools:

Scoop and bayonet shovels;
Construction bubble level from 60 cm long;
Bench hammer;
Rubber hammer for laying tiles or paving stones;
Construction marking cord and a set of wooden stakes or pieces of reinforcement;
Trowel and spatulas;
Roulette;
Construction knife;
Chisel;
Angle grinder (grinder) with discs of at least 230 mm for stone and metal;
Container for preparing solutions.

We present the further process in the form of a table.

Image	Process description
	Considering the surface drainage plan or project, it is necessary to determine the water discharge points, that is, those places where water collected from the surface will go into the sewer pipeline leading to the drainage well. The depth of this pipeline must be laid below the depth of soil freezing, which for most populated climatic zones of Russia is 60-80 cm. It is in our interests to minimize the number of discharge points, but to ensure the required drainage capacity.
	Discharge of water into the pipeline must be done either through sand traps or through storm water inlets to ensure filtering of debris and sand. First of all, it is necessary to provide for their connection using standard shaped elements of external sewerage to the pipeline and try on these elements at the installation site.
	It is better to provide for the connection of rainwater inlets located under drainpipes in advance, even at the stage of arranging wall drainage, so that when the snow melts during thaws and the off-season, the water flowing from the roofs immediately enters the underground pipeline and does not freeze in the trays, blind areas and paths.
	If it is not possible to install sand traps, then you can connect the sewer pipeline directly to the trays. For this purpose, polymer concrete trays have special technological holes that allow connecting a vertical pipeline.
	Some manufacturers have special baskets attached to the vertical water discharge, which protect the drainage system from clogging.
	Most plastic trays, in addition to vertical connections, can also have lateral connections. But this should be done only when there is confidence in the purity of the discharged water, since it is much more difficult to clean drainage wells and catchment containers than baskets.
	To install surface drainage elements, you first need to select soil to the required depth and width. To do this, with an existing lawn, the turf is cut to the required width, which is defined as the width of the element being installed plus 20 cm - 10 cm on each side. It may be necessary to dismantle curbs and outer rows of paving slabs or paving stones.
	In depth for installing drainage elements, it is necessary to select soil equal to the depth of the element plus 20 cm. Of these, 10 cm for sand or crushed stone preparation, and 10 cm for a concrete base. The soil is removed, the base is cleaned and compacted, and then a backfill is made of crushed stone of a fraction of 5-20 mm. Then the pegs are driven in and the cord is pulled, which will determine the level of the trays to be installed.
	Elements of surface drainage are tried on at the installation site. In this case, the direction of water flow, which is usually indicated on the side surface of the trays, should be taken into account.
	Holes are made in the drainage elements for connecting sewer pipes. In plastic trays this is done with a knife, and in polymer concrete trays with a chisel and hammer.
	When fitting parts, it may be necessary to cut off part of the tray. Plastic ones are easily cut with a hacksaw, and polymer concrete ones with a grinder. Galvanized metal grates are cut with metal shears, and cast iron grates are cut with a grinder.
	End caps are installed on the last trays using a special adhesive-sealant.
	To install surface drainage elements, it is best to use ready-made dry mixtures of sand concrete M-300, which are available from many manufacturers. A solution is prepared in a suitable container, which should be dense in consistency. It is better to install from the discharge points – sand traps. Concrete is laid on the prepared base.
	Then it is leveled with a trowel and a sand trap is installed on this pad.
	Then it is aligned along the previously stretched cord. If necessary, press the tray into place using a rubber hammer.
	Check the correct installation using the cord and level.
	Trays and sand traps are positioned so that when the grate is installed, its plane is 3-5 mm below the surface level. Then the water will flow freely into the trays, and the grilles will not be damaged by car wheels.
	The leveled sand trap is immediately fixed on the sides with concrete mixture. A so-called concrete heel is formed.
	Similarly, drainage trays are installed on the concrete base.
	They are also aligned both by cord and level.
	After installation, the joints are sealed with a special sealant, which is always offered when purchasing trays.
	Experienced installers can apply sealant before installing the trays, applying it to the ends before installation.
	When installing plastic trays into concrete, they may become deformed. Therefore, it is better to install them with installed grilles, which, to avoid contamination, are best wrapped in plastic film.
	If the surface is flat and has no slopes, then ensuring the required slope of the trays will be problematic. The way out of this situation is to install a cascade of trays of the same width but different depths.
	After installing all the surface drainage elements, a concrete heel is formed, and then paving stones or paving slabs are installed in place, if they were dismantled. The surface of the paving stones should be 3-5 mm higher than the grid of the drainage tray.
	An expansion joint must be made between the paving stones and the trays. Instead of the recommended rubber cords, you can use a strip of roofing felt folded in half and sealant.
	After the concrete has set, after 2-3 days you can backfill the excavated soil.
	After compacting the soil, the previously removed layer of turf is laid on top. It needs to be laid 5-7 cm higher than the rest of the lawn surface, as over time it will compact and settle.
	After flushing the entire surface drainage system and checking its performance, the trays, rainwater inlets and sand traps are closed with grates. It is possible to subject elements to vertical load only after 7-10 days.

When operating a surface drainage system, it is necessary to periodically clean storm water inlets and sand traps. If necessary, you can remove the protective grilles and wash the trays themselves with a strong stream of water. Water collected after rains or melting snow is most suitable for later use for watering the garden, vegetable garden or lawns. Groundwater collected by a deep drainage system may have a different chemical composition and cannot always be used for the same purposes. Therefore, we once again remind and advise our readers to collect groundwater and atmospheric water separately.

Video: Installation of a drainage system

Equipment for deep drainage of the site

We have already described in what cases deep drainage of a site is needed and found out that it is almost always needed in order to forever forget about the problems of stagnant puddles, constant dirt or the death of various plants that cannot tolerate waterlogged soils. The difficulty of equipping deep drainage is that if the site has already been landscaped, trees and shrubs have been planted, and there is a well-groomed lawn, then this order will have to be disrupted at least partially. Therefore, we recommend immediately organizing a deep drainage system on newly acquired plots for construction. As in all other cases, the design of such a drainage system must be ordered from specialists. Independent incorrect calculation and execution of the drainage system can lead to the fact that waterlogged areas on the site will be adjacent to dry ones.

In areas with pronounced topography, a drainage system can become a beautiful part of the landscape. To do this, an open canal or network of canals is organized through which water can freely flow beyond the site. Storm drains from the roof can also be directed into the same channels. But readers will certainly agree with the authors that the presence of a large number of channels will bring more inconvenience than benefits from their contemplation. That is why closed-type deep drainage is most often equipped. Opponents of deep drainage may argue that such systems can lead to excessive drainage of fertile soil, which will negatively affect plants. However, any fertile soils have a very good and useful property - they retain exactly as much water in their thickness as is necessary, and plants growing on the soils take from it exactly as much water as is necessary for their root system.

The main guiding document for organizing a drainage system is a graphic plan of the drainage system, which indicates everything: the location of collector and storage wells, the cross-section of drainage pipes and their depth, the cross-section of the drainage trench and other useful information. An example of a drainage system plan is shown in the figure.

Let's consider the main stages of creating deep drainage of the site.

Image	Process description
	First of all, the site is marked, in which the position of the main elements of the drainage system is transferred from the plan to the terrain. The routes of the drainage pipes are marked with a tensioned cord, which can immediately be pulled either horizontally or with a slope, which should be in each of the sections.
	A pit is dug for a storage drainage well of the required depth. The bottom of the pit is compacted and 10 cm of sand is poured and compacted onto it. The body of the well is tried on in place.
	A trench is dug in the direction from the well towards the beginning of the main collector pipe, the bottom of which is immediately given the required slope specified in the project, but not less than 2 cm per 1 linear meter of pipe. The width of the trench near the bottom is 40 m. The depth depends on the specific project.
	From the collector trench, trenches are dug for drains that will be connected to the collector pipe. The bottom of the trenches is immediately given the required slope. The width of the trenches in the bottom area is 40 cm. The depth is according to the project. On clay and loamy soils, the average depth of drains is 0.6-0.8 meters, and on sandy soils - 0.8-1.2 meters.
	The locations of rotary and collector inspection manholes are being prepared.
	After checking the depth and required slopes, 10 cm of sand is poured onto the bottom of all trenches, which is subsequently wetted and compacted manually.
	Geotextiles are lined at the bottom of the trenches so that they extend onto the side walls. Depending on the depth of the trench and the width of the geotest fabric, it is fixed either on the walls of the trench or on top.
	The wells are installed and tried on in their places, the places where the couplings are inserted are marked. Then the wells are removed and the necessary couplings are cut into them to connect the drains, and the bottoms are mounted.
	The wells are installed in their places and leveled. A layer of granite crushed stone or washed gravel with a fraction of 20-40 mm and a thickness of 10 cm is poured into the trench. The crushed stone layer is compacted and the necessary slopes are created.
	The required sections of drainage pipes are cut off and equipped with plugs (if necessary). In most cases, beam drains are made from pipes with a diameter of 110 mm, and collector drains – 160 mm. The pipes are laid in trenches and connected to well couplings and fittings. Their depth and slopes are checked.
	A 20 cm layer of crushed stone or washed gravel is poured over the drains. After compaction, the crushed stone layer is covered with geotextiles previously fixed to the walls of the trenches or on top.
	The drainage system is checked for functionality. To do this, in various places where drains are laid, a large amount of water is poured into the trenches. Its absorption into the crushed stone layer and flow through rotary, collector wells and into the main drainage well are controlled.
	A layer of sand is poured over the geotextile, at least 20 cm thick. The sand is compacted, and on top of it the trenches are filled with fertile soil - 15-20 cm.
	Covers are put on the wells.

Even if deep drainage of the site was done without a project, it is still necessary to draw up a plan to indicate the location of the drains and their depth. This will help in the future, when carrying out any excavation work, to leave the system undamaged. If the terrain allows, then drainage wells may not be installed, and the water collected by drains is immediately sent to sewers, reservoirs or a collective storm sewer system. Any of these steps must be coordinated with neighbors and village administrations. But a well is still desirable, at least to control the groundwater level and its seasonal fluctuations.

A collector well for collecting groundwater can be made overflow. When the water level in such wells becomes higher than the overflow pipe, some of the water flows through the sewer pipe into another storage well. This system allows you to get clean water in the storage well, since all the dirt, silt and debris settles in the collector overflow well.

When famous thinkers, called great, whose sayings are constantly quoted and cited as examples, put their thoughts on paper, they probably did not even suspect that they were writing about deep drainage. Here are some examples:

A collective image of a thinker who is known to most people, like Kozma Prutkov, said: “Look at the root!” Great phrase about deep drainage! If the owner wants to grow garden trees on his property, he simply must know where the groundwater lies, since its excess in the area of the root system has a bad effect on most plants.
The very famous thinker and “generator of wisdom” Oscar Wilde also said, without knowing it, about deep drainage: “The biggest vice in a person is superficiality. Everything that happens in our lives has its own deep meaning.”
Stanislaw Jerzy Lec said the following about depth: “A swamp sometimes gives the impression of depth.” This phrase fits drainage perfectly, since without it the area may well turn into a swamp.

We can give many more quotes from great people and connect them with drainage, but we will not distract the readers of our portal from the main idea. For the safety of homes and the comfort of their inhabitants, creating ideal conditions for the growth of necessary plants, and arranging a cozy landscape, drainage is definitely needed.

Conclusion

It should be noted that residents of most regions of Russia are incredibly lucky if the issue of drainage is raised. An abundance of water, especially fresh water, is much better than a lack of it. Residents of arid and desert regions, having read such an article, would sigh and say: “We would like your problems!” Therefore, we simply must consider ourselves lucky that we live in a country that does not lack fresh water.

As we have already noted, you can always “negotiate” with water using the drainage system. The modern market abundance offers a simply gigantic assortment of various components, allowing you to create a system of any complexity. But in this matter one must be very selective and careful, since excessive complexity of any system reduces its reliability. Therefore, we again and again recommend ordering a drainage project from specialists. And the independent implementation of site drainage is within the capabilities of any good owner, and we hope that our article will help in some way.

Drainage system around the house

Even the most reliable and high-quality foundation waterproofing cannot indefinitely resist ground moisture. Sooner or later, water will find its way through opened capillaries, cracks and mechanical defects in the insulating layer. To prevent this from happening, and to prevent the foundation from becoming a capillary pump over time and a source of dampness in the premises, it is necessary to divert groundwater away from the foundation or, at least, reduce the capillary pressure on the waterproofing surface.

The most reliable way to protect the foundation from getting wet is to remove water from it through drainage. The following describes various drainage systems and provides examples of their implementation.

What is drainage and how does it work?

If waterproofing can be compared to a wall for water, then drainage is like a drainage pump. Waterproofing and a drainage system around the house complement each other perfectly and provide the most complete protection of the foundation from ground moisture.

As you know from a school physics course, liquid, according to the law of communicating vessels, always flows into a lower place. Do not forget that in the soil moisture spreads through the capillaries quite slowly. Therefore, quickly draining the collected water through the drainage pipes allows you to create a dry area behind them. It is this effect that is used to protect the foundation of the house.

It is not difficult to lay drainage around the house with your own hands. It is a system of perforated pipes that collect groundwater, which flows by gravity to a discharge point in a suitable place, for example, to a special well.

In any case, drainage pipes are installed at a slope. Ideally, the soil around the house has a slight slope, and there is a ravine nearby where water can be discharged. In a horizontal area located in a lowland, water has to be collected in a special storage tank - a drainage well, from where it is periodically pumped out as it fills. The accumulated moisture can be used both for technical needs and for watering plants.

Ready-made drainage pipes can be replaced with homemade ones. A do-it-yourself drainage pipe is made from orange water pipe (thick-walled pipe for outdoor installation). The effect is achieved by drilling many drainage holes in it.

Types of drainage for a private house

There are two types of do-it-yourself foundation drainage for a house: surface and deep. The first of them is necessary for draining water after melting snow and rain from the surface of the soil or blind area. Structurally, this is an ordinary storm drain. Water is collected into it along the foundation area, which has a slight slope from the wall of the house in the direction of the sewer pipe. The size of the storm drain depends on the maximum precipitation level in the area and the area of the roof that collects water.

To protect from groundwater, it is necessary to equip a deep drainage system. Moreover, it should be located as low as possible, ideally below the base of the foundation.

To save money and time, some inexperienced developers combine the waste and drainage systems by organizing the drainage of roof gutters into a drainage pipe. This should not be done under any circumstances, since during rain the drainage pipe does not have time to drain the drainage water, and it actively penetrates into the soil through the perforation, causing waterlogging around the drainage. If there is nowhere to drain rainwater, you can drain it directly into a drainage storage tank, but always through its own separate pipe.

The drainage arrangement itself greatly depends on the type of soil. So for sandy soil with a high clay horizon lying above the base of the foundation, drainage should take place at the junction of the clay and sandy horizons. Heavy clay soil does not allow water to pass through well, and to determine the depth of water penetration, you will have to dig an exploration pit. On very wetlands, it may be necessary to create a local watershed using a waterproof film or even a concrete barrier in the ground.

Arrangement of deep drainage

The main element of underground drainage is a perforated drainage pipe that collects water from the ground and transports it due to its slope. The greater the slope, the more efficiently the home’s self-installed drainage works, and the more water is drained from the ground. But a strong slope leads to a sharp increase in the amount of work, especially with a large length of the water drainage system.

On the other hand, a small slope of the pipes slows down the movement of water and leads to gradual silting of the internal channels. A slope of at least 1 cm per linear meter of pipe is considered acceptable. The slope angle must remain constant throughout the drainage. Otherwise, sediment will begin to accumulate at the fracture sites, which will gradually lead to blockage of the pipes. During drainage installation, this angle must be controlled using a meter bubble level and a centimeter lining.

A drainage ditch is dug along the perimeter of the foundation no closer than 50 cm from it. If the blind area of the house is wider than half a meter, we dig a ditch along its edge. The minimum width of the ditch is also 50 cm. The wall closest to the foundation is made vertical. The opposite slope of the ditch has a slight slope. Further actions depend on the type of soil and the level of waterlogging in the soil.

Construction of a drainage system on light soils

If the soil does not suffer from high humidity and has a light mechanical structure, drainage can be arranged according to a simplified scheme. Water-permeable geotextiles are laid at the bottom of the ditch with overlapping edges. A layer of coarse sand and several centimeters of medium and fine gravel are poured onto it. A drainage pipe is laid on top of the crushed stone.

Then it is completely covered with crushed stone and the whole thing is covered with the edges of agrofibre. Sand and crushed stone act as a filter, trapping solid particles that can clog drainage holes. The ditch with the pipe is filled with a thin layer of small crushed stone and then with soil.

How to make drainage around a house with high levels of waterlogging

For heavily waterlogged soil, the drainage described above will not be enough. To separate excess moisture, waterproofing is first installed along the outer edge of the ditch. The simplest option to make such an artificial watershed is to cover the outer wall of the ditch with a waterproof membrane or several layers of roofing felt. The depth of the ditch in this case must exceed the level of the waterproof clay horizon or be below the base of the foundation.

For complete protection, the drainage must complete a perimeter around the foundation. The drainage point is installed in the place where the pipes are most buried. As already mentioned, a storage tank can serve to collect both groundwater and precipitation. In this case, the joint use of drainage and drainage pipes is unacceptable, and the groundwater discharge point should be located below the connection point for the rain drain.

Bottom line

A drainage system around the house provides a fairly high level of protection against the foundation getting wet. Thanks to a properly equipped water drainage system, you will be free from many problems associated with increased dampness for many years.