Do-it-yourself installation of flexible tiles: step-by-step instructions on how to carry out the work. Errors when installing flexible tiles (soft roofing) Causes of swelling of flexible tiles

Today, soft roofs not only occupy a leading position in the market, but have become a real discovery for designers and architects. Many styles, individual solutions and the possibility of easy implementation on complex roof structures - what more could you ask for? The main thing is to achieve absolute tightness between the shingles, on which the durability of the entire coating depends. And the installation itself flexible tiles It will be within your power, believe me, even if this is your first time encountering this type of work!

Therefore, if you carefully read our tips, you will be able to cover even a large roof with the help of one more person. The fact is that even in the factory, shingles are prepared for gluing by applying a special solution to the bottom layer, and they even make four holes so that you know exactly where to drive in the roofing nails. And about all the intricacies of working with soft roof We'll tell you now.

Once the roof frame is ready, install the vapor barrier as a continuous carpet on the inside of the roof, without gaps, and secure it to the rafters with wooden planks. You will then attach them to the same strips interior lining attics.

Now take care of the vapor barrier. If the attic is cold, then all the moisture will come out of it on its own, using natural ventilation. But in the case of a residential attic, a vapor barrier is necessary. For this purpose, an additional strip is stuffed on the rafters, rolled out vapor barrier film with an overlap and glued with special tape (regular tape is not suitable!).

Next, with outside Place the selected insulation on the vapor barrier film, preferably staggered. Cover the top windproof membrane and secure with bars, which will also later serve to create ventilation ducts.

As a result, you should end up with a “layer cake” like this, as roofers like to call it:

We have prepared for you detailed master class, how and in what order everything should happen:

As you noticed from the photos above, laying flexible sheets on the curved lucarnes was not difficult!

Step 2. Installation of continuous flooring

To install flexible tiles, a rigid solid base is required. Therefore, mount a solid carpet of plywood or OSB boards on the prepared sheathing, with a gap of 3-5 mm, which is necessary for deformation from temperature and moisture, and secure it to the rafters with self-tapping screws.

The main requirement for a base for flexible tiles is a flat area and the ability to fix the shingles with nails. For this purpose, sheets of glued wood shavings similar to plywood or tongue-and-groove boards laid end to end are suitable. Only the board should be as dry as possible so that waves do not form during drying. But it’s a big mistake to use only the sheathing itself, albeit more frequently, for a soft roof, because already in the first season the entire roof will simply go in waves. And photos with such problems become a real asset for manufacturers who scare their customers with such errors.

Once the base is ready, reinforce the eaves overhang with metal strips. These are laid edgewise on the edge of the base and secured with roofing nails, in increments of 150 mm, in a checkerboard pattern:

Step 3. Selecting and installing the substrate

Now is the time to take care of waterproofing. It is necessary in such difficult places as abutments, joints and valleys. Here the canvases are laid from bottom to top with an overlap of 10 cm in the longitudinal and 15 cm in the transverse direction:

We recommend that you use a specially designed underlay rather than roofing felt or similar material, as is sometimes done. The fact is that they have a finishing roofing– different service life, and even conditions of use!

And such an attempt to save money will soon lead to swelling of the entire roofing carpet. In addition, no manufacturer will provide a guarantee for a roof that contains materials from third-party manufacturers.

By the way, until recently, lining carpets were practically not used in Russia, and even today many people try to cheat. This is logical, because by the time the roof is built, it often turns out that the planned budget for the entire house is not enough, and concessions have to be made. But, if you want to lay roofing tiles and forget about it for many decades, then do not give up such an important element.

There is always a risk that water will penetrate into the under-roof space, especially in such difficult places as bypassing chimneys or contact with an installed antenna. There are also emergency situations when strong winds lift shingles during a rainstorm.

Moreover, choosing a roofing carpet is not difficult, because... it is subject to the same requirements as tiles: to be resistant to temperature changes, to provide reliable waterproofing and serve for a long time. A modern market provides many options, both imported and domestic. Moreover, many factories in Russia today operate on European equipment and the quality of their products is not inferior to their foreign counterparts.

In general, underlay carpets come in two types: self-adhesive and with mechanical fixation. Self-adhesive ones are laid mainly in valleys, and mechanical ones are rolled out over the remaining roof area and fixed with galvanized nails:

Here is the process of installing a regular roofing carpet, which will need to be fixed with bitumen mastic:

Here is an example of working with a more modern self-adhesive roofing carpet:

So, a self-adhesive waterproofing carpet is ideal for a valley. And, if the slopes have a slope of more than 18 degrees, then consider laying the carpet in all places of probable leaks, and these are: ribs, ridges, gable overhang and all exits of roofing elements.

But on a roof with a slope of 12 to 18 degrees you will need a continuous waterproofing carpet. Before this, we recommend placing a self-adhesive bitumen-polymer material, for example, “Barrier”, on the eaves overhangs, and at the same time strive to ensure that the carpet itself is without overlap - continuous along the entire length:

Also insulate ventilation passages and areas around them in advance. skylights and chimneys. Before installing the flexible tiles, coat all the passage elements with bitumen mastic yourself - it’s not difficult.

Before you begin laying shingles, you will also need to strengthen the eaves overhangs. They need to be fixed with roofing nails in increments of 10-15 cm. Here is an educational video lesson on this topic from the company:

Step 4. Selecting fasteners

To secure shingles, you will need special nails with wide heads. It will be extremely important to nail them so that the head is in the same plane with the surface of each shingle, and at the same time does not “crawl” into it. In addition, nails for soft tiles must be galvanized.

Nails for installing soft tiles are divided into the following types:

• Tar paper nails. Their tip is so sharp that when buried in the bitumen layer, they do not violate its integrity. Such nails are produced galvanized or without a protective layer at all. Of course, unprotected ones are the cheapest, but at the same time they are not at all practical and quickly begin to rust. These are only suitable for assembling furniture or constructing temporary sheds.
• Rough nails. They have special teeth on the working rod that are directed towards the cap. These are not easily driven into wood, although it is quite difficult to pull them out even with a nail puller. And most often, during the dismantling process, the heads of rough nails are simply cut off - and that’s it. They fix the roofing so tightly that they are more often used for slate than for soft roofing.
• Club nails They have longitudinal grooves and jumpers on the working rod, and they are less suitable for soft roofing.

We recommend that you use galvanized rough nails with a head diameter of 8-9 millimeters as roofing nails specifically for flexible tiles. They also produce special nails for bitumen shingles, and they differ from their standard counterparts.

These are made from strong steel wire, which is automatically cut into equal pieces, then the workpiece is sharpened on one side, and riveted into the shape of a hat on the other. If you find these on sale, you can buy them.

But it is important that the nails themselves comply with GOST 4030-63: the diameter of the rod is 3.5 mm, and the diameter of the head is at least 8 mm. The thing is that when working with concrete shingles, the most unpleasant moment is when the nails, with the next blow, simply sink into the bitumen layer and thereby violate the integrity of the coating. But the expanded cap will not be able to “sink” so easily. And the larger it is, the better it will hold the shingles, which is why high-quality nails for flexible tiles resemble a pushpin. Moreover, for single-layer and two-layer tiles you will need nails with parameters of 30x3.5 mm, and for three-layer tiles - 45x3.5 mm.

By the way, some would-be builders don’t understand why they can’t just heat up sheets of soft tiles and glue them to the flooring, why exactly nails and all the fuss associated with them? In fact, the use of open fire on such a roof is prohibited due to basic fire safety considerations. So, forget about this risky idea and rent an automatic appliance.

Step 5: Place the starting strip

Now let’s move on directly to laying flexible tiles. It starts from the starting line. As such you can take:

• a pattern from ordinary tiles, for example shingles with cut petals, if you are working with collections " Tango" or " Trio»;
• universal ridge-eaves tiles, especially if you work with “ Chord», « Sonata" or " Jazz».

If it's more convenient for you to start with the eaves tiles, lay them on top of the metal strip, stepping back a little from the bend. Next, nail it down, but keep in mind that the longer and steeper the slope, the greater the indentation from the inflection point should be:

Here's what laying the starting strip looks like in practice:

Step 6. Installation of different types of shingles

Now let's unpack the shingles. The main requirement for their installation is dry, warm weather, because it is undesirable to lay bitumen shingles at temperatures less than +5°C, because in areas where it will need to be bent, it will be difficult to avoid cracks.

If you still have to fasten shingles in such conditions, you will need preventive measures: the sheets are heated construction hairdryer and bend over metal pipe about 10 cm in diameter. But it's better not to do that.

Calculate required amount shingles are not difficult: take one sheet, measure the area that will be visible, find out the area of ​​the slope and divide the second by the first. Here is valuable advice on how to calculate and prepare flexible tiles for installation:

Of course, if you have a diamond eye, you can get by with detailed calculations, but the marking lines serve as excellent guides along which you can align the tiles both vertically and horizontally. Especially if you are laying soft roofing for the first time.

Believe me, tearing off several sheets and reattaching them to fix a jamb is not the most fun. And absolutely without markings, if some element is embedded in the roof or the overall geometry of the slope is broken. Tools such as a hammer, a plumb line and a level will help you in this matter.

As we have already said, usually, for convenience, ready-made shingles are marked with small holes in the factory so that you know exactly where to hammer the nails. If there are none (for example, in the cheapest collections), then simply step back 2-3 cm from the edge and be guided by this illustration:

In each case, the place where the nail is driven will directly depend on the shape of the cut of the tile itself. It is only important that each nail simultaneously pierces both the lower and upper edges of all sheets, and if you are laying flexible tiles on slopes with an angle of 45°, then the upper corners of the shingles also need to be additionally fixed.

The entire procedure for laying flexible tiles is not complicated, here are the instructions for the process itself:

1. Before installation, mix shingles from several sticks to minimize color variations. The fact is that even in one mail the color can differ so much that you will be surprised, and such incidents will be very noticeable on the roof.
2. If the slope is long enough, start laying the tiles from its center and level it horizontally. And the second row is already shifting the shingles to the left or right by half a sheet. Shift the third and all subsequent rows relative to the previous one, also half the petal, left or right, depending on which direction you initially chose.
3. You need to start laying tiles on a slope with a lesser slope, and you should approach a steeper slope by at least 30 cm. On a steeper slope, it is recommended to knock off the chalk lines so as not to get lost. Now cut the tiles on a more slope along this new line, and after fixing, coat them with bitumen mastic where there is no self-adhesive layer on the back side.
4. Lay the tiles from bottom to top, moving away from the edge of the drip edges. Here you will need to lay special ridge-eaves tiles. By the way, you can replace it with a regular one if you cut the petals.

Now secure the shingles. An automatic tool is good for this, especially if it works from electrical network. The main thing is that when choosing a model, take care of your own safety: the trigger mechanism should be comfortable, with protection against an accidental shot and the ability to remove a stuck nail without any risk. After all, usually a hammer is more intended for minor works By household, and professional roofers use it extremely rarely.

The only point: if the special roofing nails do not fit the gun, take a ready-made clip of nails with a wide flat head. They differ in that they are connected to each other by a thin wire. This kind of tape is inserted into the chamber and the nail is fed one after another. This is much more convenient when working at heights: you don’t need to look for bunches, you don’t need to expose your fingers to the blow, and the fastening itself will be of better quality than when you are already too tired on the 501st nail. The main thing is to follow the basic technology: the nail must be driven in strictly perpendicular to the plane of the shingle.

Remember, if some shingle was not securely fixed, then over time it will loosen its fastening and fly off with a gust of wind. And the nail itself, lifted by the wind, will tear the sheet, shaking the neighboring one. And all this will lead to leakage and necessary repairs. Of course, it will not be possible to completely avoid problem areas, which is why periodic inspection of such a roof is necessary.

Now let's look at the features of installing shingles different types. So, before installation, you need to remove the protective film from single-layer shingles, which is always located on both sides of the shingles. Why is she? The fact is that this roofing covering is transported by ordinary trucks both in the heat and in the heat, but we are still talking about bitumen.

But in collections with such cuts as “ Dragon tooth", there is no film, it is only important to choose a beautiful pattern or lay it chaotically, simply mixing shingles.

And how exactly to work with each type of shingle cutting, the following illustrations will help you:

Further, if you have to work with complex roof, you have two ways to install asphalt shingles: segmented and seamless. In the first method, divide the corner or cone into equal segments, and lay each of them separately. And in this way, cover the entire roof. The seamless method is more complicated: here it is important to make the correct marking of the ramp and navigate according to it. Think and choose the one that seems more convenient to you.

Step 7. Fastening the tiles in the valleys

And now - about the most problem areas roofs. You can organize the valleys, namely the internal curves of the roof, in two ways: open and closed, which is also called the undercut method. The main thing is then to make a triangular strip at the junction of the roof and the wall and place tiles under it.

In addition, if the wall is brick, it must be plastered and treated with a bitumen primer. Top part the junction must then be covered with a metal apron, which must be secured and inserted into the grooves, and then sealed:

Step 8. Laying ridge and spine tiles

Next, we will understand the concepts of ridge tiles. As you might guess, these are the shingles that cover the ridge of the roof. All other tiles are called ordinary tiles. By the way, spine tiles are obtained when the ridge-cornice tile is divided into three parts, or they are cut out from ordinary ordinary tiles using the perforation method.

To correctly lay the spine tiles, use a cord to mark off the dimensions of the future ridge - these are two stripes along it, and lay the spine tiles from the bottom up. Then secure the shingles with nails on each side and make sure that the overlap of the overlying shingles overlaps the nails by 5 cm.

The ridge tiles are laid on the side opposite to the so-called wind rose (you can find out about this from your neighbors or from the wind map). Then everything is the same as during the laying of the ridge. If there is no self-adhesive layer in the right places, coat it with mastic.

Now let's move on to the ribs. Here ordinary tiles should be cut so that there is a distance of 3 to 5 mm between adjacent slopes:

Here's another great tutorial that walks you through the details of the process:

And finally, finishing work. The installation of flexible tiles is always completed by installing a ridge aerator. To do this, a special groove is cut along all the slopes, and an aerator is inserted into it. It is fixed with nails and covered with special ridge tiles.

Also, special additional elements are made for soft roofing - these are the lower parts of the roof passages, which are popularly called “skirts”. And to prevent snow from accumulating behind ventilation and chimney pipes, especially when their cross-section exceeds 50x50 cm, you need to organize a groove. In short, you will need the following elements:

So, your roof is ready, and all that remains is to properly care for it. To do this, once every six months, use a soft brush to sweep away all small debris, leaves and branches, from the roof. The main thing is not to use sharp tools, because it is important not to scratch the basalt chips. And clean your gutters and funnels from time to time.

Fortunately, a roof made of flexible tiles is highly repairable: it is enough to heat the damaged area, remove it and lay new tiles. It's just a matter of one day!

When installing flexible tiles, the use of low-quality, cheap component materials that do not comply with GOST leads to unpleasant consequences. For example, “blowing of the roof” or “appearance of waves.” In this article we would like to take a closer look at the reasons for this effect.

Example 1. Flexible bitumen shingles from a European manufacturer. 3TAB shingle shape. Photo taken from a large Russian construction portal.

This problem and methods of dealing with it are well known to professionals, and we would like to Once again Focus on this topic to prevent installation errors.

Example 2. Flexible bitumen shingles from a European manufacturer. Shingle shape Hexagon. Photo taken from a large Russian construction portal.

It is no secret that the real reason for this problem is the quality of the materials of the solid base and compliance with the technology of its installation. This conclusion is clearly confirmed by the results of studies of similar objects, as well as tests of base and roofing materials conducted by our company, studies conducted by our colleagues from the Unikma company (), as well as many foreign studies.

The most common material for making a solid base today is OSB-3.

This is due to the manufacturability of this material, attractive price and high performance characteristics, declared by the manufacturing companies. However, it is the actual properties of this material that are the source of the problems that arise.

The reason for the formation of waves is the linear expansion of the OSB board (see Fig. 1 and Fig. 2). When delivered to the site in its original packaging, the OSB board has minimal humidity due to its manufacturing technology. The humidity of the new slab material is significantly lower than the humidity of the surrounding air. During operation, the moisture content in the slab and the surrounding air comes into equilibrium, which leads to moistening of the OSB and linear expansion (swelling). The edges of the slab, thanks to the gaps of 3-5 mm left between the slabs, have the ability to move, which leads to the formation of “waves” on the shingles of asphalt shingles along the short (to a greater extent) and long sides of the OSB slabs.

Rice. 1 Factory humidity of OSB during installation without preliminary exposure.

Rice. 2 Actual humidity of OSB during operation.

If you doubt the quality of the product, ask the distributor for a quality certificate for the OSB board, which indicates the actual characteristics for a specific batch of products.

Installation conditions.

The formation of “waves” is less often observed on roofs installed in the warm and humid season, since in such conditions OSB boards have time to acquire “equilibrium” moisture even before installation of the roof covering - during storage on the site and installation of the base.

Waves most often appear on roofs installed in cold weather (less than +5 °C), when air humidity is minimal. But they appear when the outside temperature rises along with air humidity.

When installing a roof in cold weather, we recommend pre-conditioning (conditioning) the OSB panels before installation. OSB panels should be stored outdoors for 1-2 weeks, exposed to atmospheric air, in this case it is necessary to cover the OSB panels from precipitation, and lay gaskets (slats) between the sheets to allow air access to all parts of the sheet.

The problem is aggravated by the fact that the quality of OSB boards leaves much to be desired. For example, at some sites where waves appeared, samples of OSB boards from leading manufacturers were taken and sent to an independent laboratory to be tested for the indicator “thickness swelling in 24 hours” (GOST 32567-2013 clause 5.8 table 5).

Example 3. Flexible bitumen shingles American manufacturer. 3TAB shingle shape. Photo taken from the American Construction Forum.

According to the test results, at least half of these samples did not comply with GOST for this indicator, and, as a result, they were unsuitable for use as a solid base. Unfortunately, absolutely all manufacturers of flexible tiles, both domestic and foreign, are faced with this phenomenon, regardless of the shape of the tile or the type of bitumen. And this once again confirms that the reason for the occurrence of “waves” lies in the foundation.

Some clients mistakenly believe that this effect is related to the quality of the shingles or underlayment itself, blaming the manufacturer. They base their guesses on the fact that when the OSB roof is opened, the slab looks normal, i.e. it does not delaminate, does not warp, and even some of the gaps remain (only they become much smaller, but no one pays attention to this). This gives the impression quality product. But, as shown above, this is not at all the case, and it is the OSB board that is the root cause of the formation of folds on the roof.

However, there is also positive news: from the experience of observing similar roofs on which waves formed, it was noticed that these deformations disappear over time. The time period ranges from several weeks to one year and depends on the quality of the OSB board, air humidity and the organization of ventilation of the under-roof space. In addition, do not forget that this effect affects exclusively the aesthetic perception of the mounted material and cannot in any way worsen waterproofing characteristics flexible bitumen shingles.

Example 4. Multilayer flexible bitumen shingles from Russian manufacturer. Shingle shape Dragon tooth. Photo taken from the Russian construction forum

Below we would like to present measures that will reduce the risk of waves on tiles:

• Pre-conditioning (conditioning) of OSB panels before installation. OSB panels should be stored outdoors for 1-2 weeks, exposed to atmospheric air, while it is necessary to cover the OSB panels from precipitation, and lay gaskets (slats) between the sheets to allow air access to all parts of the sheet.
• Cutting OSB sheets along the long side (2500 mm) into pieces of 0.5 meters, which will reduce the linear expansion of each individual piece and reduce the formation of waves.

We hope that this article will help minimize the risk of such a phenomenon as “waves” on the roofs of our clients!

Installation of soft bitumen shingles must be carried out in accordance with the manufacturer's instructions.

Inattentive Study technical documentation, errors when choosing materials for roofing pie, haste and the desire to save money lead to various problems, including: leaks, visual defects, and reduced service life of the coating.

Knowing the most common mistakes will help you avoid unforeseen situations and serious costs for urgent repairs.

Use of wet lumber. During the operation of the house, the board used for sheathing dries out and becomes deformed. The slope becomes uneven, which leads to shingles peeling off, water flowing in, and reduced resistance to wind loads. For need to use edged board coniferous species with humidity no more than 20%.

Laying OSB without gaps. This leads to deformation of soft tiles at the joints of OSB sheets and the formation of elevations that spoil the appearance of the roof. Compensation gaps prevent the sheets from pressing against each other as the temperature rises or humidity increases. The installation instructions say: “a gap of 2-3 mm should be left between the OSB sheets.”

Improper storage of underlay carpet. Bends and folds, dents and creases form on the material. As a result, the laid underlay carpet loses its ideal surface geometry. becomes more complex, choosing a pattern becomes more difficult, and waves form on the surface of the finished roof. The lining carpet should be stored in an upright position at normal humidity and a temperature not exceeding +30ºС.

Laying underlay carpet at low temperatures. As the temperature rises, a natural change in linear dimensions occurs OSB sheets. This leads to the formation of waves on the roof made of flexible tiles. The defect is more cosmetic and may go away over time. But is it worth the risk? Manufacturers recommend at a temperature not lower than +5ºС.

Error in selection of material: thick carpet, thin tiles. This combination “reveals” all the shortcomings and flaws in the installation of the base and underlayment. Irregularities and waves appear, resulting in a decrease in the resistance of the coating to wind and mechanical loads. It is better to use soft tiles and carpet from the same manufacturer, and the thickness of the tiles should be greater.

Errors when installing wind slats. These provide a tight connection between the roof and gables of the building. Improper installation leads to water flowing under the tiles and into. The pediment planks begin to be laid from the eaves, making an overlap between adjacent elements of at least 5 cm. The planks are nailed with roofing nails in a checkerboard pattern.

Use fewer nails for fastening or nails without notches. Saving on fasteners or using nails that are not intended for fixing the roof leads to a decrease in the reliability of the roof. In this case, the shingles are easily torn off by strong winds. For installation of soft tiles, 25-30 mm long with a wide head are used. There are 4 - 6 nails per shingle (depending on the angle of the roof).

Installation without using markings. Laying shingles “by eye” leads to the formation of a crooked pattern. The markings play the role of guides; horizontal lines are applied using construction laces or using a stretched rope.

Use shingles from only one pack. This leads to the formation of a “zebra effect”, which will negatively affect appearance roofs. Manufacturers recommend taking one shingle from 5-6 different packs to avoid variations in color.

Installation in hot weather. At temperatures above +25ºС, the bitumen in the flexible tiles softens. This makes it difficult to move on already installed shingles, and there is a risk of damaging the shingles with shoes. Roofing work is best carried out at a temperature of +5 - +20ºС in dry weather.

The standard set of tasks for a real man, as you know, includes three points: give birth to a son, plant a tree and build a house. And today among the stronger sex, regardless of profession and status, there are many who strive to literally bring them to life. Even more easy to use modern materials and technologies allow us to successfully carry out the construction and renovation of a country house on our own. For example, to achieve guaranteed reliability and durability pitched roof possible, thanks to the use of lining carpet. It forms a continuous waterproofing layer through which moisture that has penetrated into the under-roof space simply drains without causing damage to the structure.

Now this progressive specialized material is produced in Russia. Underlay carpets ANDEREP of TECHNONICOL Corporation successfully compete in foreign markets and do for Russian consumers quality independent of imports. A non-professional builder can easily handle their installation. However, there are a number of nuances, neglect of which can lead to a decrease in efficiency. About them - below.

Substrate preparation and installation conditions

The successful functioning of the underlay carpet and finishing coating largely depends on a properly prepared base and the conditions in which the installation was carried out. Therefore, it is extremely important to avoid mistakes at these stages. Base plates - OSB, or moisture-resistant plywood must be laid with a gap of no more than 3 mm. Otherwise, during the process of thermal expansion, the surface may be deformed, unevenness will be created on the lining carpet, and the roof will lose, at least in its aesthetic appeal. Installation on wet bases or “spring installation” can also lead to the formation of wavy folds on the surface. During the winter, structures inevitably gain moisture, and at positive temperatures they begin to release it. The expert recommends avoiding haste and starting laying the material only when the building frame and the mounted surface are in one temperature conditions and in acceptable humidity. For sheathing structures, the permissible humidity is no more than 20%, for solid wooden flooring(OSB and moisture-resistant plywood) - no more than 12%.

Folds and waves in the underlayment can also occur if it is installed in different temperature and time frames. For example, a team may begin work in the evening, when the air temperature drops and the material hardens. At such a time, even small folds on the material will be invisible. In the morning, when the temperature rises, the lining carpet will soften, begin to fit tightly to the surface, and any irregularities will gather into large folds. To prevent this from happening, the installation of the lining carpet must be carried out in one temperature regime with its maximum softness and pliability, that is, during the day and at the same time of year.

Alexey Vorobiev

Choosing the right underlay carpet

Many people today understand the need for underlay carpet. But it is important not just to lay down an underlayment, but to choose a solution that is most suitable for a specific construction task. A common mistake is replacing specialized products with cheap ones. roofing materials, most often roofing felt. The savings in this case are very doubtful. The strength characteristics of roofing felt are lower. Unlike underlay carpets, it does not have a “self-healing” function. A huge number of holes formed during the mechanical fastening of it and the roofing material and increased in the process, for example, by seasonal deformations, turn such a coating into a “sieve”. Moisture that gets into the under-roof space will almost certainly end up on wooden base and can lead to its rotting and destruction. Underlay carpets, unlike roofing felt, create a continuous protective layer even on surfaces of complex geometry. But among them it is important to choose the right one. For example, any product from the ANDEREP line will be suitable for flexible tiles. But the use of economical underlay carpets ANDEREP GL and ANDEREP GL PLUS, specially designed only for flexible tiles, with other roofing materials - metal sheets, ceramic tiles etc. fraught with problems.

To do this, it is better to choose universal ultra-light underlay carpets ANDEREP PROF and ANDEREP PROF PLUS, and in places where roofs made of flexible tiles and tiles are most likely to leak, it is recommended to use ANDEREP ULTRA.

ANDEREP GL and ANDEREP GL PLUS are based on fiberglass. It imparts the necessary strength, but does not have tensile strength; therefore, materials based on it do not withstand deformation well. For higher loads, ANDEREP PROF, ANDEREP PROF PLUS and ANDEREP ULTRA materials are suitable, based on durable and stretchable polyester.

Alexey Vorobiev

Installation of “self-adhesive” and underlay carpets with mechanical fastening

A simple and optimal solution for installation is self-adhesive underlay carpets, such as ANDEREP ULTRA. To attach them, you just need to remove the protective film and roll the material to the base. It adheres tightly to the surface without forming air gaps. But when working with self-adhesive materials It is extremely important to meet several conditions. The material must be laid on a surface that is as dry and clean as possible. And the air temperature during work should not be lower than +10˚C. In addition, in places of high loads, for example, in the valley area, it is necessary to additionally apply mechanical fastening.

The most common use of underlay carpets is with mechanical fastening. This installation method is practical and simple. However, it is extremely important to correctly calculate the required amount of fasteners - if the standards are not followed, during strong gusts of wind there will be a risk of the material tearing off the surface. Overlapping material sheets must be secured with special roofing mastics. This is a rather labor-intensive process. This year TECHNONICOL launched the upgraded materials ANDEREP GL PLUS and ANDEREP PROF PLUS on the market. Unlike their “big brothers” (ANDEREP GL and ANDEREP PROF, respectively), they are equipped with special adhesive (bitumen-free) strips - to fasten the sheets, you only need to remove the protective film and glue the next sheet to the adhesive surface. The use of such materials reduces mastic consumption, makes installation less labor-intensive and increases the reliability of joints.

When installing any underlay carpet, it is extremely important to ensure its maximum tension and adherence to the surface. Therefore, installation must begin after the material rolled out from the roll has completely straightened out. The behavior of underlay carpets on the roof largely depends on their base. If the moisture requirements for the wood used in construction are not met, folds may form on materials with a fiberglass base in the joint areas of the base. To prevent such a problem from arising, it is necessary to reduce the step at which the material is attached to the base and provide additional mechanical fasteners in the middle, in several rows. Super-thin underlay carpets with a polyester backing are flexible and when folds occur, they simply wrinkle, preventing the material from lifting up the surface of the roof covering. But, accordingly, their price is more expensive.

Alexey Vorobiev

Timely protection of the underlay carpet

Underlay carpets are intended for laying under the finishing coating. A bitumen mixture without special protection is not designed for prolonged exposure to ultraviolet radiation. The sand coating on the material is intended only to ensure the safe movement of the person performing the installation. It is advisable to leave such material without a topcoat for no more than a week. But the underlay carpets ANDEREP GL PLUS, ANDEREP PROF, ANDEREP PROF PLUS and ANDEREP ULTRA will not lose their properties under direct influence environment for six months.

When installing the roof due to various reasons There may be interruptions in work. In such situations, a number of underlay carpets can effectively perform the functions of a temporary roof for a fairly long period. The materials ANDEREP GL PLUS, ANDEREP PROF, ANDEREP PROF PLUS are given this ability by a protective coating of non-woven polypropylene (Spunbond), and ANDEREP ULTRA - by the increased content of high-quality modifiers contained in the bitumen mixture.

Alexey Vorobiev

Thus, right choice underlay carpet and strict adherence to the manufacturer's instructions will allow those who are used to doing everything themselves to provide reliable and durable protection for the pitched roof of the house.

In order for flexible roof tiles to serve for a long time, it is important to install them correctly, in compliance with all requirements and standards. The process involves laying a special lining carpet. It is purchased separately and costs a lot of money, but without it the roof will be unreliable. Is an underlayment needed for flexible tiles and how is it installed? We answer these and other questions in the article.

To understand the features and necessity of using underlay carpet, it is important to understand what kind of material it is and what functions it performs. Underlayment carpet is a kind of membrane that performs a moisture-repellent function, protects the roof from leaks and interior spaces houses from flooding. The carpet is roll material, which is made from bitumen and polymers. Usually the structure of the material contains fiberglass or a base made of polyester fabric. This part of the carpet is covered with polymer compounds (usually bitumen-based), as well as fine quartz sand or fine crumbs. The bottom of the carpet may have an adhesive film that helps secure the material to the base. Crumbs or sand ensure that the surface of the carpet is not slippery - the material is always laid with the abrasive side up.

In general, the structure of the roof, which is covered with soft tiles, has the following layers, when viewed from top to bottom:

• directly the flexible tile itself;
• carpet lining;
• base (for example, OSB board);
• layer of waterproofing material;
• insulation layer;
• rafter and sheathing system;
• film providing vapor barrier.

Only a roof that has all these layers will be reliable and will not leak throughout its entire service life.

Functions of underlay carpet

The lining carpet has two main functions - leveling the base and waterproofing the roof. Using this material, you can easily make invisible the joints between the sheets of material that cover the sheathing. It will also help compensate for differences in roof level.

On a note! The underlayment will also prevent air bubbles from forming under individual roofing elements.

The waterproofing function is especially important in vulnerable places - for example, in the area of ​​eaves, valleys, and the junction of the roof with pipes. The material will also prevent the formation of condensation inside roofing system during air temperature fluctuations. And the carpet in regions with a lot of snow acts as a shock-absorbing substrate when a large number of precipitation forms on the roof.

Due to the fact that the lining carpet provides excellent protection wooden structure roofs from moisture, it will last as long as possible, as it will not begin to rot. After all, even processed by various protective equipment wood is still prone to destruction if it is constantly exposed to moisture.

On a note! The underlay carpet can be used as a temporary roof - it is so reliable. Material in rainy regions plays important role in protecting the building under construction from moisture. It is always installed first.

Prices for lining carpets

Underlay carpet

In general, the following advantages of lining carpet can be distinguished:

• strength;
• tightness;
• good moisture-proof function;
• heat and sound insulation of premises;
• leveling the roof base;
• ensuring protection of the interior of the roof from condensation.

The main disadvantage of underlay carpet is its considerable cost. The material is sometimes compared in price to the softest tiles.

With a slight slope of the roof slopes, the coating is laid on the valleys and ridge. The carpet should be laid in rolls from bottom to top. The overlap is usually 20 cm

Is underlay carpet required?

Many people ask how justified the use of lining bark is. After all, waterproofing can be done in other ways, and the base under the tiles can be made as even as possible. Is it worth spending money on this expensive material? The answer from experts is unequivocal - it’s worth it. And all the positive aspects of using underlay carpet are described above. The most important thing is that the material will extend the service life of the roof as a whole for many years.

There are also cases in which it is impossible to refuse a carpet under any circumstances. For example, if the roof slope is very small (up to 18 degrees) or, conversely, too high (over 60 degrees), then you will still have to use this material. Otherwise, the store where the soft tiles were purchased will not even provide a guarantee for their products.

On a note! If the desire to save money is great, then on medium-sloping slopes you can not lay an underlay carpet, but use it only in particularly vulnerable places.

Which carpet to choose?

If the decision to purchase carpet underlay is not worth it, then it is important to decide what type of product to purchase. The material is always produced in rolls 1 m wide, but, depending on the manufacturer or some features, it may differ. First of all, carpets are divided into two types according to the method of fastening:

• self-adhesive, which is fixed by an adhesive strip applied at the factory to the wrong side of the material and sealed with a protective film. This is the most common variety;
• without adhesive base, which is fixed only with galvanized self-tapping screws or roofing nails with a pitch of 20 cm. The edges of the sections joining each other are additionally connected using bitumen mastic.

There is also a so-called combined type, which in the lower part of the canvas is fixed to an adhesive base, and in the upper part - using fasteners. There are also weldable materials that are fixed by heating with a construction hairdryer.

Important! When purchasing an underlay carpet, you need to make sure that there are instructions for use for it. And during installation you will have to act strictly according to it.

Self-adhesive carpet is the most popular among all types. It is produced in rolls measuring 1x15 meters or more. During installation, it is unrolled and glued to the base of the roof parallel to the overhang of the eaves. Individual strips are laid with an overlap of 10-15 cm. The service life of the carpet is on average 15-25 years and will directly depend on several factors - design features roofing, climatic conditions of the region, compliance with installation rules.

Advice! In areas where leakage is most likely, it is recommended to lay the underlay carpet in two layers.

Table. Manufacturers of underlay carpets.

Name	Characteristic
	Finnish-made material, which, depending on the type, can be fixed in different ways - mechanically, with glue. Prevents the formation and accumulation of condensation. The material is of high quality.
	Russian manufacturer. The company produces lining carpets that can be fixed to the base using screws or glue. The material is of high quality.
	One of the most famous manufacturing companies. It produces several types of underlay carpets that can be used for various types of roofs.
	Material made from non-woven polypropylene. Suitable for arranging cold roofs, for laying under bitumen shingles, for standing seam metal roofs. Can act as a temporary roof. Production - Germany.
	The material is produced in Russia. The base is fiberglass coated with a bituminous composition, sometimes with the addition of polymers. Suitable for roofs with a slope greater than 11.3 degrees.

On a note! The lining carpet purchased for work must be stored in a dry place at a temperature of no more than +30 degrees. It is best to place the rolls in a vertical position. They cannot be placed near heating radiators.

Installation subtleties

Installation of the underlayment is relatively simple, but during work it is worth following certain rules and follow recommendations. Then the material will last long years without any complaints, reliably protecting the roof from leaks. When installing underlay carpet, it is important to ensure that the material is well stretched. Usually the covering spreads horizontally, starting from the lower edge of the roof. But if the roof has a large slope, then the rolls can be laid vertically.

The pitch of the self-tapping screws, if a material that requires mechanical fixation is used, is approximately 10-20 cm. Roofing fasteners can also be used for additional fixation of the self-adhesive coating. All joints and seams must be well sealed with bitumen mastic, and the width of the adhesive strip should not be less than 10 cm.

The main condition that must be observed when laying the underlayment is the evenness of the base, which is created on top of the sheathing or roof rafters. The following materials can be used as a base for underlay carpet.

Attention! When installing a flat base under the carpet, it is important to ensure that there are gaps between the individual sheets of leveling material. Their width is 2-4 mm. Otherwise, the material may deform over time due to thermal expansion or humidity.

Prices for moisture-resistant plywood

Moisture-resistant plywood

Installation of underlayment on the roof is carried out at air temperatures from +5 to +25 degrees. If it is necessary to trim the material, use a sharp knife and a board, which is placed under the area to be trimmed. This will prevent damage to other layers of material.

Step 1. To lay underlayment under soft tiles you will need a number of tools, as well as some materials. This bitumen mastic, small metal spatula, sharp knife, pencil and tape measure, pliers, hammer.

Step 2. The rafters are covered with leveling material (OSB boards). A gap of several millimeters must be left between the individual elements of the base. Next, the cornice strips are installed. They are fixed along the perimeter of the roof on its edge. In this case, in the valley area, two separate planks are laid overlapping.

Step 3. The eaves strips are nailed down with galvanized roofing nails in a checkerboard pattern in 15 cm increments. Too close to the bend cornice strip fasteners are not clogged.

Step 4. In the valley area, the planks are joined so that the small remaining tongue of the previously fixed plank is under the next plank. Then the connection will be neat.

Step 5. Installation of the underlay carpet begins. A piece of carpet 1 m wide is laid on the valley so that there is 50 cm of covering on both sides of the valley axis.

Step 6. The carpet is carefully leveled on the surface, and it should not reach the edge of the eaves strip by about 2-3 cm. Moreover, the smaller the angle and length of the roof slope, the smaller the indentation.

Step 7 The protective film is removed from the back surface of the carpet. For convenience, one part of the carpet is turned away, the film is removed from it and put away under the other part of the carpet.

Step 8 Half a carpet with removed film placed back and smoothed to the surface of the base with your hands. Exactly the same procedure is performed with the second half of the carpet.

Step 9 The underlayment carpet is spread over the rest of the roof horizontal stripes. A distance of 1-3 cm is also maintained from the edge of the cornice.

Step 10 The material is laid overlapping the previously laid piece of carpet on the valley. The overlap must be at least 15 cm.

Step 11 Gluing starts from the edge of the roof. The protective film is torn off from the extreme section of the carpet and tucked under the other edge of the material. The coating is spread on the base and glued.

Step 12 The rest of the roll is rolled into a tube. During gluing, simultaneous removal takes place protective film and gluing the carpet to the roof surface.

Step 13 The rest of the roof can be covered with mechanically secured carpet. A piece of the required length is laid with a longitudinal overlap of 10 cm. The carpet in the upper part is nailed with galvanized fastening material in increments of 20-25 cm.

Step 14 All carpet joints are coated with bitumen-based mastic. Layer of applied adhesive composition should not be more than 1 mm.

Prices for bitumen mastic

Bitumen mastic

Video - Installation of underlay carpet

Video – Nuances of installing a TechnoNikol carpet

Video – Lining carpet Shinglas

Installation of underlay carpet is not difficult, the main thing is to comply with all the rules and requirements. Only in this case will it be possible to prevent mistakes that could become fatal and spoil the reliability of the roof.