The underlay carpet under the tiles is a roll material that serves for additional protection of the base (flooring) from moisture and other external influences.
It performs several functions at once:
- serves additional layer reliable waterproofing;
- acts as a buffer between the flooring and the tiles;
- prevents the accumulation of condensation in the under-roof space.
Condensation can form after heating the roof in the sun in the form of dew at night, after heavy rainfall or during the cold season. The underlayment is capable of trapping small amounts of moisture, which can penetrate the tiles during ice melting or bad weather, until they evaporate on their own.
Types and features of lining carpets for soft tiles
Varieties of protective carpet for installing a soft roof:
Bituminous or roofing felt type - with a base of fiberglass or felt impregnated on both sides with modified bitumen. The surface of the material is covered on both sides with a layer of fine quartz sand. It is fixed on the base using nails or special staples, and the joints are coated with bituminous glue.
Self-adhesive with increased strength - made of fiberglass impregnated with bitumen. On the front side, the material is sprinkled with mineral chips or granulate, and on the inside, a sticky layer of bitumen mastic is applied to it and covered with plastic wrap. It can be easily removed and the installation process is carried out without the use of fasteners. This type of underlayment is more expensive, but can only be used at the edges of the roof and in the most vulnerable areas.
Membrane type - made of synthetic polymer materials, in appearance it resembles a superdiffusion vapor-permeable membrane. The material is waterproof, high density and weather resistant. It is distinguished by its low weight, very high strength, durability and ease of installation.
Methods for laying underlay carpet
Domestic and foreign manufacturers offer to buy underlayment under the tiles at prices that are in a fairly wide range. However, the cost of purchasing it will also depend on the method of laying this protective material.
Underlay carpet under shingles can fit in two ways:
Solid flooring - laying is done over the entire area of \u200b\u200bthe base. This serves as a guarantee against leaks and prolongs the life of the roof. The material consumption with this method of installation will be maximum, but it must be done with roof slope angles less than 18 ° and more than 60 °.
Decking only on problematic or vulnerable places - with average indications, the catch of the roof slope is from 18 to 60 degrees. Installation can only be carried out in valleys, ends, on ridge and eaves, along the perimeter, in penetrations and roof windows to protect these structural elements from moisture penetration. In this case, the material consumption will be much less.
Please note that almost all manufacturers do not recommend laying shingles without a lining carpet and do not give a guarantee for their products if they were not used during the installation of the roofing material.
An underlay carpet for any flexible roof is mandatory and belongs to the important elements of the roofing device. The main purpose of the underlay is to provide an additional waterproofing layer in places that are most likely to be prone to leaks in the installed roof covering. In addition, such an element becomes a reliable barrier against high humidity and well protects all elements of the roof, arranged by means of flexible tiles.
Do you need a carpet under the tiles
The underlay is a waterproof and shock absorbing barrier. The absence of such an element in the roofing device can negatively affect the performance and durability of the roof. There are situations when the device of a lining carpet is simply necessary.
These conditions include:
- the presence of small slopes - an angle of up to 18 degrees;
- the presence of too steep slopes with a slope of more than 60 degrees;
With these design features, it is recommended to cover the entire roof area with a lining carpet. If the pitched slope has average values, then it is allowed to perform protection with this type of carpet in the most problematic areas of the roof. In conditions of steep slopes, construction experts recommend that the underlayment be laid in the vertical direction of the roof covering. Sloping roofs can be covered horizontally.
The main requirement for the correct arrangement of the backing layer is the optimal tension and the performance of a high-quality joining of the material. In addition, it should be borne in mind that horizontal laying starts from the eaves in the direction of the ridge, and vertical laying should take into account the direction of the wind.
Underlayment easily tackles the following problems:
- eliminates all irregularities in the form of depressions and protrusions, which is especially important in places where chimney and ventilation pipes are installed;
- additionally protects and seals all weak points on the roof surface;
- provides a high degree of heat and sound insulation;
Modern types lining carpets They are distinguished by their tightness and water resistance, due to which another moisture-resistant layer is formed under the cover of soft tiles. Most manufacturers claim different warranty periods for shingles depending on the use of the underlay. It is for this reason that one should not save on this roofing element and make right choice in favor of partial or complete roofing.
Types of underlays for shingles:
- fixed carpet - fixed by means of nails with a step of twenty-five centimeters;
- carpets with a self-adhesive backing... They are distinguished by ease of installation and ease of use due to the absence of the need to use fasteners.
On pitched roofs can be used:
- standard bituminous bedding;
- reinforced types of bituminous bedding;
- synthetic underlays.
The quality material for the lining is based on fiberglass, which gives it excellent technical characteristics.
Carpets from Technonicol
Self-adhesive types of TechnoNICOL underlayment(Shinglas) are represented by the following types:
It is a self-adhesive lining material that has an increased level of strength and reliability. Such indicators are due to the presence of a strong polyester base and the introduction of high-quality bitumen-polymer components into the binders. The upper protective layer of this lining material is characterized by fine-grained sand spreading.
- brand ANDEREP BARRIER
It is represented by a baseless self-adhesive material with an upper protective layer in the form of a thick reinforcing film. Maintaining integrity waterproofing properties material in case of accidental mechanical damage contributes to the characteristic lack of a base.
Types of mechanical lining carpets:
- aNDEREP PROF brand
It has a very durable polyester backing and a high quality non-slip top coat made with polypropylene. The special bitumen-polymer mixture included in the material allows the bedding of this type to perform a kind of "self-healing", which manifests itself in maintaining tightness at the point of entry of the fasteners.
- aNDEREP GL brand
High-quality and modern lining material with double-sided protection based on polymer mixtures and a fine-grained layer of sand dust.
Styling technologies
To date, several options for laying underlay carpet have become widespread, which are usually mounted under a soft roof covering. The selection principle is based on the tasks that are presented to the coverage. Most widespread received a classic version that improves the tightness of the roofing.
The direction of installation of the underlay carpet does not matter, and all attention must be paid to the high-quality design of the joints related to the most vulnerable attachment points.
For the installation of a lining carpet under a roof made of soft tiles, it is necessary to give preference to the vertical direction of the tiling. The implementation of this rule is very important with a significant roof slope. Such technological features allow to reduce the load and minimize the formation of folds with a large roof slope.
Direction and technology of laying carpet under a flexible roof Installation and fastening to the frame
From the choice of the type of lining material and the quality performance of all installation works the operational life of the roof structure depends.
Required tools:
- standard hammer;
- bituminous mastic,
- chopping cord;
- construction tape;
- a construction knife and a spatula, convenient for work.
A good quality requires a smooth, dry, clean and permanent base. For wooden structures roof pitch rafters can be 60-150 centimeters.
Features of installation under shingles:
- pitched angle less than 21% - laying is performed over the entire roofing area using self-adhesive lining material;
- pitched angle of 21-32.5% - laying is performed over the entire roofing area.
- pitched angle of 32% or more - laying the lining material at the points where the roofing is most likely to leak. Such places include sections of eaves, valleys, pediment overhangs, pitched ribs, roof ridge, exits and points of abutment.
Installation of the underlay on the roof: A - with a slope angle of less than 32 °; B - with a slope angle of more than 32 ° 1 - lining carpet; 2 - self-adhesive bitumen-polymer material Before installation, consider the way in which the brackets are attached drainage system... As a general rule, the bracket system must be installed prior to the installation of the backing materials.
For more information on installation and its features, see the video.
Material cost
The greatest demand for roofing made of soft tiles is typical for the following types of lining material:
- premium Deck-Armor based on stabilized type UV polypropylene. The installed area of \u200b\u200bthe under-roof carpet is 37 sq.m. Available in rolls 30.5 meters long and 1.22 meters wide. The average cost of the material is 4.800 rubles / roll.
- Shingle-Mate, "standard" grade based on bitumen and glass fiber reinforced... Available in rolls 43.9 meters long and 0.9 meters wide. The installed area of \u200b\u200bthe under-roof carpet is 40 sq.m. Average cost - 2.350 rubles / roll.
- Self-adhesive type of underlayment from TechnoNICOL brand "Barrier" with an installed area of \u200b\u200b15 sq. m - 1.950 rubles / roll.
Summing up
The roofing underlay made of shingles must have a high level of waterproofing protection.
The use of a lining carpet under a soft tile covering, which is equipped with the entire roofing area, helps to improve the waterproofing properties of the roof and eliminate minor defects in the base.
A high-quality underlay can significantly extend the service life of a roofing covering made by means of shingles.
- Types of roofing
- Laying the base in the area of \u200b\u200bthe chimney and roof ridge
There are some peculiarities of laying soft tiles. The main feature is the need to lay the underlay carpet under soft tiles... It will protect against moisture penetration under the roof and smooth out the unevenness of the surface.
The underlay is necessary to protect the roof from moisture penetration and smooth uneven surfaces.
The main difference between soft tiles and ordinary tiles is that there is no hard base. This means that gradually it will begin to reproduce all surface imperfections. The violation will appear some time after the carpet shrinks. But as a result, due to temperature changes and exposure to rain and snow, the roofing material will change shape.
To compensate for unevenness and differences in the roof, use a lining carpet.It is a roll material based on fiberglass. The standard width of the backing sheet for shingles is 1 m in width and up to 20 m in length.
This layer is installed immediately before the installation of the roof begins.
The underlayment removes the protrusions next to the chimney.
The qualities of the material are such that it can be safely used for some time as a roofing material until the main one is laid.
In addition, the compensating lining can perform other useful functions:
- The lining material greatly simplifies the installation of the valley - a roof element necessary for the removal of precipitation. It also protects vulnerable areas - joints of slopes and chimney openings.
- In winter, the underlayment can partially compensate for the snow load on the shingles, thus extending the service life.
- Provides reliable waterproofing... The material is completely impervious to moisture, moreover, it is resistant to both high and low temperatures.
- Allows you to get rid of the protrusions next to the chimney.
- Prevents common problems like eaves leakage.
Installation of heat and waterproofing allows you to cope with the effects of temperature and moisture, but does not make it possible to reduce the load on the roof surface and cannot become a full-fledged replacement for the underlay. Therefore, the masters do not advise to neglect the laying carpet.
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Types of roofing
Most often, fiberglass is used as the main material for a carpet for tiles, much less often polyester fabric. To improve the waterproofing and cushioning of the material, the surface is treated with bitumen mastic with plasticizers. This material is highly frost-resistant, not prone to cracking and is elastic at the same time.
The outer part is covered with silicon sand to prevent slipping. In addition, this layer can serve as a reinforcing function.
The main difference between different types of lining materials comes down to the way they are attached to the roof surface. Usually the underlay for shingles is fixed mechanically using special nails or screws, but there are other types of materials. Tile underlays can be self-adhesive or guided.
In the production of self-adhesive underlays, strips of glue are applied to the inner surface, which are then protected with foil. Before installing the underlay, remove the film from the surface. Such substrates are convenient to use, since they do not require the use of nails and screws to install them.
The guided pads do not have an adhesive surface. In order to ensure a solid fastening, it is necessary to fasten them. To do this, special roofing nails are driven in every 20 cm. Instead, you can use a construction stapler or wide-head screws.
When installing the roof, you can use both types of material. A self-adhesive backing is fixed on the upper part, and guided with a construction stapler or nails from the bottom and from the sides.
After choosing the type of roofing material for soft tiles, it is worth calculating the approximate material consumption, which largely depends on the installation method.
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Carrying out the installation of the underlay
Before installing the backing, you must collect all the tools that will be needed for the work.
Basic tools for laying underlay carpet:
- construction cord - needed for marking;
- measuring tape must be of optimal length;
- special knife for soft roofing;
- scissors for metal;
- hammer;
- a screwdriver or screwdriver (if you plan to fix the material with self-tapping screws);
- glue applicator, such as a spatula.
The presence of all the necessary devices will significantly simplify and shorten the work time.
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Installation requirements for the backing layer
Installation of the carpet takes place according to certain rules. In some cases, it is imperative to cover not the entire roof area, but only in certain areas. The area to be covered with underlayment depends on the slope of the roof slope. If the slope is more than 18º (or 1: 3), it is enough to protect the most vulnerable areas:
- endova;
- end part;
- eaves overhangs;
- chimneys;
- ventilation.
In these places, the roof is heavily loaded, especially during snowfalls and heavy rains. Therefore, there remains the danger that moisture gets into the under-roof space.
With a slope of less than 18º, the load on the roof will be much higher when snow accumulates. For this reason, it is recommended to cover the entire roof area with underlayment.
If there is a support bar at the edge of the pediment, then the lining should be laid on top, leaving a small "margin". Such a measure will prevent ingestion roofing cake moisture during rains and snowfall.
In general, laying direction is not so important. The main thing is to ensure good tension of the material and high-quality fastening of the joints. Wrinkling may occur when the pad is laid at a steep angle. To avoid this, installation is advised to be carried out vertically.
The roll is usually unrolled horizontally on a roof with a slight slope, a complex configuration, and also if there are valleys. The installation takes place from the bottom towards the roof ridge. The lining roll is unrolled, the material is well leveled so that there are no folds or folds left. Then the sheet is well fixed.
If there is a valley on the roof, then it is better to start installation from this element. The lining sheet must be laid along the length of the valley so that the overlap of the strips is at least 15 cm, then it must be glued with bituminous glue.
So that the roof made of bituminous shingles reliably serves long years without leaks and destruction, during its installation, special lining bitumen-polymer materials are used. Additional protective layerthat is laid on a solid base (OSB) directly under the shingles is called a roof underlay.
What is an under-roof carpet for?
Underlay carpet under bituminous shingles IKOPAL helps to solve several problems simultaneously:
- protects the roof from leaks. The lining material creates additional protection against precipitation, melted snow, ice. Even if water seeps under the top layer of the roof, the waterproofing carpet will keep these micro-leaks from getting inside the house;
- increases the strength and durability of the roof. If, when installing the roof, you do not use a lining carpet under the tiles, but lay it immediately on a solid base, this can provoke a gradual destruction of the roofing cake due to thermal expansion of the solid base and reduce the life of the roof;
- prevents the formation of condensation. The under-roof carpet does not "let" condensate inside the roof, thereby protecting the base from getting wet, mold and mildew.
5 advantages of using IKOPAL underlayment
The carpet made by ICOPAL, laid under the shingles, allows you to achieve undeniable advantages when laying the roof.
- Strengthening the waterproofing protection of the roof.
- Strengthening and waterproofing joint and weakened roof sections.
- Increased thermal and sound insulation.
- Concealing roof irregularities and enhancing aesthetics.
- Possibility to use an under-roof waterproofing carpet as a temporary roof.
FEL-X underlay carpet or K-EL universal underlay material, laid under the shingles, will provide effective protection in case of a large amount of snow on the roof and protect the roof from leaks even in regions with difficult climatic conditions, where oblique rain showers or strong gusty winds often occur. ...
Types of lining materials
Underlayment carpets are classified according to the type of roof attachment. There are self-adhesive options, which are fixed with an adhesive base, and fixed ones, which must be fixed with roofing nails.
Lining carpet FEL-X and K-EL material from the manufacturer ICOPAL are mounted mechanically using roofing nails in the overlap areas. This type of fastening provides increased reliability and long service life of the waterproofing material.
Subtleties of installation of roof carpets
It is possible to install underlay carpets under shingles with a continuous flooring, or reinforcing only the most vulnerable places (under certain conditions). The first option is preferable because it provides greater reliability and improved performance of the roof.
The main condition that must be observed when installing the lining is laying it on a flat, hard and durable surface (ideally, moisture-resistant plywood or OSB-3).
On shallow roofs "linings" are mounted horizontally, on steeper roofs - vertically. The rolls are laid with an overlap, fixing them along the edges with roofing nails every 20 cm and sealing the seams with Icopal roofing glue.
During installation, it is important to ensure that the underlay carpet is carefully stretched and does not form folds, which can subsequently affect the aesthetic and operational properties of the roof.
IKOPAL underlayment - a reliable base for shingles
Bituminous shingles "IKOPAL", laid on a FEL-X or K-EL underlay, will provide a roofing cake of the highest quality and reliability, which will protect against leaks, provide good thermal insulation and will last for more than a decade.
You should not save on the purchase of a subroofing carpet and lay soft roof directly onto a rigid base. This will reduce the protective properties of the roof, reduce its service life and "nullify" the manufacturer's warranty for the tiles.
Contact our managers - and they will help you find the necessary roofing materials in the right quantity.
The guarantee of a long service life of the roofing is provided by observing a number of requirements for its installation. If all stages of the work are performed according to the instructions, the roof will serve regularly for more than one decade. An important element of the roofing cake is the underlayment for shingles. In the process of choosing a material, it is worth taking care of several important points.
Features of the carpet
Modern builders are increasingly faced with a soft roof. New samples of coatings are distinguished by many possibilities both in a decorative sense and in terms of practicality during use.
The underlayment is an indispensable component of the roofing cake when laying soft roofs. It prevents the appearance of wrinkles and unevenness. It should be borne in mind that shingles tend to shrink. It acquires its final shape under the influence of rain and snow, wind loads, temperature differences.
The carpet is a film that consists of several layers:
- the basis is fiberglass;
- polymer;
- small crumb outside;
- protective and adhesive layer.
The main function of the underlay is to compensate for differences in the level of the roofing that occur under the influence of external conditions. The protective coating itself is highly reliable and resistant to various influences. The auxiliary material is especially popular in regions with a large percentage of rainy days per year. The products of the Technonikol company are most in demand on the modern market.
Carpet device
The protective film is produced for different roofing materials and therefore has several models that differ in their characteristics. The classic structure of the pie is such a "sandwich":
- flexible roof;
- protective carpet;
- OSB plate;
- waterproofing layer;
- insulating material;
- rafters;
- vapor barrier.
The protective coating does an excellent job of sealing joints in various places of the roof. It is also used during the equipment of valleys and chimneys.
A lining carpet is in demand in areas with a difficult climate. For example, in such zones, oblique showers and strong winds are often observed. The carpet is also laid to protect the covering from deformation under the pressure of the snow cap in winter.
The most requested options:
- polyester fabric;
- fiberglass.
The backing carpet is a bitumen-polymer material that is produced in rolls. It contains various fibers and plasticizers, as well as bituminous mastic. Due to its use, the degree of waterproofing increases. To reduce slip, the outside of the material is sprinkled with fine-grained sand.
Important! It is worth remembering that the protective film should be mounted with the film down and the sprinkler up.
The underlay carpet is reliable protection from getting wet of various elements of the roof, as well as eaves and chimney. The main types of lining carpet:
- self-adhesive product;
- without self-adhesive layer.
With a slight slope of the roof slopes, the covering is laid on the valleys and ridge. The carpet should be installed in rolls upwards. The overlap is usually 20 cm. The self-adhesive material must be additionally reinforced with nails. The base without a self-adhesive film is fixed with a construction stapler.
Varieties of materials
Many flexible roof manufacturers also manufacture underlays that have been specially designed for these types of roofs. The width of the rolls usually does not exceed 1 meter. The protective coatings differ in the method of attachment.
To figure out which lining carpet is best to lay, it is worth considering the main types of material:
- Standard Option - good lining without self-adhesive layer. It is fixed with galvanized nails with a large head. Sometimes they resort to using a construction stapler. The joints of the carpet are coated with mastic.
- Combined material - its upper edge is attached to nails, and the lower edge - to a self-adhesive tape, which makes it easier to overlap the material. Before installation, you just need to remove the protective tape. It is also possible to fasten the canvas with nails, especially those areas that require increased attention.
- Self-adhesive material. It is only necessary to properly spread the canvas, and then remove the film. The carpet is fastened with nails only at the edges. The strips are securely bonded to each other, forming a single waterproofing layer. If laying is carried out in cold weather, the material must be warmed up a little so that it sets better.
- Fusion-bonded underlay. Before laying such material, it is necessary to warm it up with a construction hair dryer. It is rarely used due to the inconvenience of using such a device on the roof.
Advice! When laying the lining carpet, it is better to follow the manufacturer's instructions. It also covers storage conditions.
The products of the Technonikol company are distinguished by the high quality of materials. It is in high demand among modern builders. It is necessary to store the roll material under a canopy, in a room where the humidity does not exceed 30 degrees. When using different underlays on the same roof, store them separately. This is necessary in order not to confuse different rolls. To make it more convenient to work with the material, it is worth placing the rolls along the wall in a vertical position.
Do not store the underlay near heating appliances or in rooms with high humidity. It is worth considering that the material on the roof will warm up much more, but it will be in an unfolded state.
Installation technology
Laying underlayment under shingles is carried out in several ways. Today, several mounting methods have become very popular. The material is usually placed under a soft roof. The choice is based on the tasks that are presented to roofing material... The classic version is more popular, in which the roof tightness is optimal.
The laying direction does not really matter. It is important to correctly arrange the joints. They represent the most vulnerable points. When installing the lining carpet, you should give preference to horizontal laying.
Fastening to the frame
The service life of the roof as a whole depends on the choice of the type of underlay and the quality of installation. For work you will need the following tools:
- nails with a large head;
- chopping cord;
- bituminous mastic;
- spatula and knife.
In order for the material to be laid efficiently, the substrate must be dry and clean. For wooden structures, the rafters are installed at a distance of 60-150 cm from each other. When arranging the base, it is worth using OSB, edged boards with a moisture level of no more than 20%.
There are several features of soft-shingled underlayment underlay:
- With a pitched angle of less than 21 degrees, installation should be carried out over the entire roof area. For such a task, it is better to choose a self-adhesive material.
- If the angle of the slope is in the region of 21-32.5 degrees, it is worthwhile to install it over the entire roof.
- In cases where the pitched angle is greater than 32 degrees, it is worth laying the underlay only in places where roof leaks are more likely. Such areas include eaves, ventilation outlet, chimney, roof ridge, connection points.
Conclusion
The installation technology of the underlay under shingles depends on the installation angle. Before laying the material, it is worth considering the method of fixing the gutter brackets. They are usually installed even before the protective layer is installed. Installation of underlay carpet under shingles is done in the same way as in the case of other soft flooring options.
Thus, the installation of the lining carpet is carried out according to a certain technology and in accordance with the angle of inclination of the slope. It is also worth considering the rules that are spelled out in the instructions for a particular type of material.
