What to sit under the professional. Waterproofing under the roof panting. The reasons for which waterproofing under the cold roof of the corrugated

The quality, tightness and durability of the roof of the house is determined not only by the characteristics of the roofing coating. Much depends on the compliance with the installation technology and the correct selected roofing cake, the layers of which improve the properties of each other, extending the service life of the roof. When erecting a cold or warm roof from a professional flooring, inexperienced masters often wondered if additional waterproofing is needed for this roofing. In this article we will tell about what waterproofing materials can be used for.

Waterproofing is an important layer of roofing cake with a cold and warm roof of the house of a professional flooring, which is mounted on top of the rafter foot with a construction stapler. It is made of waterproofing materials that do not let the water protecting wooden designs From wetting. Waterproofing in the roof of the corrugated floor performs several functions:

  • Protection internal surface Professional flooring from corrosion. The weak place of the roof from the professional flooring is that the lower surface of this roofing material It is protected by paints and varnish coating. Therefore, during wetting and mechanical damage, it can corrode.
  • Prevent wetting thermally insulating material. Waterproofing covers insulation, laid between rapid legs Roof. After all, with an increase in the humidity of the thermal insulation material, its effectiveness decreases sharply, but is not restored after drying. This feature is relevant only for a warm roof of the house, as for mounting cold roof The insulation is not used.
  • Prevent wetting of the roof frame at home. Wooden elements rafter systemEven if they are impregnated with an antiseptic, when contacting water, they begin to rot.

Note! Waterproofing is necessarily needed for cold, and for a warm roof of a corrugated floor. Due to the temperature difference inside the house and on the street on the bottom surface of the coating, condensate is formed, so the service life of the professional flooring is declined at times.

Requirements for waterproofing materials

Waterproofing under the roof of the corrugated floor is used in difficult conditions, so it must have increased strength qualities. Signs of high-quality waterproofing material - resistance to moisture, high and low temperature or their drops, as well as vapor permeability. Experienced masters When choosing, it is advised to take the following factors:

  1. Density. To withstand water pressure during leakage, and not to damage during installation, waterproofing is needed with a density of 0.04 kg / m2.
  2. Parry permeability. To cope with the withdrawal of heated air saturated with aqueous couples from the house, the level of vapor permeability must exceed 0.75 kg / m2.
  3. Waterproof. High-quality waterproofing film withstands water pressure in 10 MPa for 10 minutes.
  4. Wide temperature range. Waterproofing should withstand the temperature in the range -73 / + 100 degrees.
  5. Fire resistance. Since the thermal conductivity of the cold or warm roof from the professional flooring is satisfied with the high, so it is recommended to use non-combustible materials for waterproofing.
  6. Resistance to ultraviolet. Although the insulation is hidden under the layer of the roof coating, it should withstand the exposure to direct sunlight for 4 months or longer.

Consider, waterproofing for the cold roof from the corrugated floor can be any, but for warm it is necessary to use only vapor-permeable materials. The use of rubberoid or glazing as protection of the design from moisture, only even more active condensation, as well as the accelerated coating wear, provokes.

Selection of material

The construction market offers a wide selection of insulating materials for the roof, which differ in weight, strength and price. But for metal products, not every waterproofing is suitable, as it must be vapor-permeable, dense, elastic and moistureproof. There are 3 categories of waterproofing materials:


Experienced masters pay attention to what is better to use diffuse and superdiffuseous membranes for waterproofing metallic coatings. Although they are more expensive, but they have high strength, it is better to pass air and serve until 100 years.

Design features

The design of the cold and warm roof of metal products is distinguished by the presence or absence of thermal insulating material in the roofing pie. The second option costs developers more expensive, it is used if the project implies a heated subcoase room. Different requirements are presented to waterproofing the cold and hot roof:

  1. To isolate the cold roof, it is necessary to use strong, durable materials that can cope with high pressure Water leakage. It is possible to use even rubberoid, tol, glass astronomer or a scheduling, despite the fact that they are not vapor-permeable.
  2. For the installation of a warm roof, a vapor-permeable material of the type diffuse or superdiffuseous membrane is required, as it is characterized by increased condensation.

It is impossible to save on the waterproofing material, since this little things, which costs 100-200 rubles per 1 m2, depends on the service life of expensive roofing.

Video instruction

The profiled sheets have a whole number of advantages, which makes it possible to draw up various roofs with their help. Having understood how to properly reduce the roof profile, you can implement this work yourself.

What a roofing pie is

In the process of studying the issue, how to properly share the professionalist, it will be necessary to figure out the nuances of the arrangement of the roofing design. At the beginning of construction work on the construction of the roof, a rafter system is mounted. This procedure must be performed in compliance with all technical normsSince significant static and dynamic loads are found on rafters during operation. It is better if specialists who have appropriate skills in the design and installation of the design are performed.


Before drilling a profile over the finished rafter system, you need to decide on the lining material. This has a direct effect of the type of roofing design and characteristics of the material itself. For example, if the role of waterproofing is performed by a bulk paroque diffuse membrane, the need to install the parobac fever disappears. Separate insulation resistant tolerate moisture exposure and are able to skip steam. The roofs are warm or cold - it affects the purpose of the room.

If we are talking about dersighted roomThe roofing pie will include the following items:

  1. Vaporizolation.
  2. Inner crate.
  3. Insulation.
  4. Waterproofing.
  5. Control.
  6. Crane.
  7. Profiled sheet.


The cold roof provides for the presence of only a waterproofing layer, which must necessarily have vapor-free characteristics. This will give the opportunity to excessively to leave him in the indoor of moisture: Thus, the attic will be saved from the accumulation of dampness.

The arrangement of a cold roof is much less time, forces and means than on the construction of a warmed design. After the arrangement of roofing cake, you can retain the roof of the professional flooring.

Raise professional flooring to the place of installation

Before you get the strap on the roof, it must be raised there in the intact condition. Typically, short sheets rise quite simply, due to their good vertical stiffness. However, since it is desirable to sharpen a professionalist with a small number of docking sites, the length of the material used for these purposes can be 5 or more than meters. This implies the presence of certain difficulties with a lifting of such a sheet - the slightest careless movement can lead to its deformation or breakage.


To raise the proflist on the roof, one of three ways are usually used:

  • Construction crane.
  • Suspension.
  • Guides.

The first method is considered the simplest, but at the same time, the most expensive. The roofing material first laid on pallets, and then raise it to the surface of the mounted crane crank. Pallets on the roof it is better to lower on the site that will be shown last. It will make it possible to do without the time-consuming procedure for permuting them from place to place.

The use of suspensions is the most inexpensive way to file a professional flooring to the placement site. However, its implementation will require a lot of time. Having lifted a pack of material on the roof, you need to put it on a pre-cooked place over the crate. It is also important to think about how to fix this pack on the roof. In the process of implementation, the long side of the professional leaf is based on the basis, and the last wave is equipped with a pair of wooden bars along with the last wave. It is important to make it so that they act a little both from one and the other side.


For dense fixation of bars, screws, metal brackets or clamps are usually used. To raise a sheet up, the rope is tied along the edges of wooden bars. After that, you will need to hold full dismantle all fastening system. Next, the same assembly procedure and disassembly are carried out for each next sheet. It takes a lot of time to this, besides, several people need for the implementation of such work.

In the third case, special seed guides are used. Laying two wooden bars is carried out with such a calculation so that they get inside the extreme waves on the inside. For fastening guides are used wooden boards, in increments of 1-1.5 m. The finished improvised staircase is set so that one side is resting on the roof, and the second is on the surface of the earth. The angle of inclination of the structure must roughly coincide with the angle of inclination of the roof. By riding a profiled sheet on two sides in the area of \u200b\u200ba long rope area, you can drag it on the roof. In order to avoid applying, scratches, guides covered with tarpaulin or any other dense tissue.

How to lay profile sheets

Disarning in how to properly sharpen a row to the roof, it is impossible to bypass the basic installation schemes of the material. The layout of the professional flooring is thought out in advance: for this you can use a specialized program or just a paper sheet.


The presence of an accurate scheme will noticeably speed up the installation procedure, and will also give the opportunity to do without unnecessary cutters. The location of the roofing sheets is selected the lower edge of the sink, on any side. If you want to arrange a single or double roof, because of the simplicity of work, the preliminary scheme is usually not done. The use of a professional sheet with a capillary groove will require special care: a plot with a groove needs to be placed under the adjacent sheet.

List of challenges for the professional sheet

It is necessary to install some good items on the surface of the roof, as how it is not possible to lay a corrugated flooring on the roof without them. Basically, for this purpose, an earthen bar, endand and adjoining planks apply. With the help of the cornice bar, the front board is protected from climatic moisture, and the attic - from entering it the rain with severe wind gusts. It is attached over the frontal boards using self-tapping screws, with a step of 2-2.5 m. The totaling is used - from 100 mm. The cornice bar must be started under the waterproofing material: it will enable moisture, penetrated under roofing, smoothly flush.


The Randa Plank is also installed before it should be treated on the roof. It includes two parts - external and internal. The inner component is under the coating. The location of the docking should be arranged by an additional layer of waterproofing material or a special tape. With the help of adjacent slats, passages are organized through the roofing surface of various pipes and other elements. The bottom plank of the adjoint must be started under the default at a distance of 20 cm.

Styling technology profiled sheet on roof

Before laying a corrugation on the roof, the cord check the plane of the skates. When drops are detected, more than 5 mm are eliminated using the lining for the crate, or cutting out suitable grooves in the control. This stage should not be missed, since it is quite difficult to strengthen the profile on an uneven base.


On the roofing rugs of a simple rectangular shape, any lower angle can become the place of installation. For temporary fixation of the sheet, a pair of screws is suitable. The installation of the first row of the profile sheet is carried out in such a way as to achieve full overlap of the cornese sweep. The dimensions of the protrusions for the edges should be within 50-60 mm. This is especially related to situations if the drainage gutter is laid on top of the roof cornice. If the drainage system is not used, the protrusions of the professional flooring must be increased to 200-300 mm.

How to properly cut the sheets on the roof

By mounting 2-3 sheets included in the first row, you can proceed to the second row. At the same time, it is necessary to achieve overlapping by sheets of the next row by 150-200 mm of material sheets in the previous row. The size of the allen depends on the fact that the roof is in this case. For these purposes there are special tables in which the most common coating stamps are calculated.

So how to properly reduce the roofing sheet is quite simple, some masters use immediately finish fixation, without reconciling the mechanism of laying on the sinks. It is for this reason that the ugly skews of the roofing material are obtained. To correct such errors, do not do without unscrewing the screws and the sheet to the sheet. Reliable to complete the final consolidation of the professional flooring after checking.


If it is necessary to arrange a triangular or trapezoidal skate, the installation is carried out on another algorithm. The starting site in this case is the central part of the skate or line, passing between the edge of the skate and the cornice. After that, the direction of installation serve both sides.

Special roofing screws protrude as fasteners of profiled sheets on the roofing crate. Usually they have a hexagon head and a drump-like tip. For fastening, the bottom wave of the profile is used for fastening the brawl. The jurisdiction site of self-tapping screws is every wave on the eaves and a plot of adhesion. The rest of the surface is equipped with fasteners every 300-400 mm, applying chess order for their location. For installation of the skate on the crate, long screws will be required.

All developers are wondering what put under metal tile to keep on long years Wooden roof design elements, and the roof itself. The durability of rafters and longitudinal beams, air temperature in summer and winter in the attic room, directly depends on the choice of substrate under the tile. First of all, it is necessary to fulfill all the recommendations of the tile manufacturer.

Metal tile includes several insulating layers that carry an important function to protect the entire house from the negative effect of cold, moisture, noise.

What role does the substrate play in the exploitation of the house, what kind of types of the substrate and in what cases is this or other applies? We will try to deal with these issues.

Varieties of substrate

The substrate for metal tile must be chosen depending on the assignment of the attic room.

There are substrates for cold premises and there is a substrate for residential, that is, heated premises. Substrates for residential premises (like attic) are presented to some requirements, and for a cold attic - others.

The substrate for a cold attic is much easier than for heated. A counterclaim is attached to rafters, and it is a doom. Between them leave free space for air circulation.

The crate is placed on the protection of wooden structures from moisture, which penetrates the attic room through looseness in the tile.

For a warm attic, the substrate design looks different. Also attach a doom and a counterclaim. But more stringent requirements are presented to waterproofing. In this case, it not only must protect the attic room from moisture from the outside, but also from condensate, which is formed on the inner surface of the metal tile due to the difference in the outdoor air and indoor temperature.

To top it up to this, the waterproofing film should ensure the removal of water vapors rising from the lower rooms so that the insulation remains dry and did not lose its qualities.

Between the waterproofing and insulation, there is airspace from 2 to 4 cm for air ventilation.

Depending on climate in your region, the material of the insulation and its thickness is chosen. Below are placed film for isolation. And already over the film, a residential premises are trimmed at the request of the developer. This design is called "Roofing Pie". It is optimal to protect roofing structures from external and internal adverse conditions.

Substrate from Ruberoid

On stacked only in the presence of crates and only with a cold roof.

Ruberoid as a substrate apply only for cold attic premises. Put or not put the rubberoid under the metal tile, each developer decides itself. It should only be noted that if the roof is cold and the attic is well ventilated, then you can put a ruler, but in this case there is a basic cavity between the ruberoid and tiles.

If the roof is old and is already covered with rubberoid, then in this case it is possible on top of it, after mounting the crate for the air layer.

But most specialists are skeptical about such a device and believes that it is best not to put the rubberoid under metal tile, because, in the end, it will lead to a damage of the roof.

Roof waterproofing

Waterproofing layer protects heat insulation material And the entire wooden structure of the roof from the effects of rain and snow, which get involved with strong winds. In addition, the film prevents the condensate from the inner side of the tile to thermal insulation.
can be in two ways:

  1. To mount the insulation of the crate and put the film on it, thereby ensuring the gap between them 2-4 cm for ventilation.
  2. And you can put the film directly on thermal insulation without clearance. But at the same time it is necessary to apply a special membrane-diffuser. Such a film will not miss the moisture outside and at the same time will absorb the one that in the form of a wet vapor rises from the lower rooms.

And although the membrane diffuser film has a higher cost compared to a conventional film, it has undoubted advantages. Its lies directly to the insulation, and the need for air layer disappears. With strong wind, it significantly reduces thermal losses.

Being a waterproof outside, the film is able to absorb pairs from the inside, that is, such a roof will "breathe". As a result, wooden roof designs will remain dry and serve you much longer.

Warming and vaporizolation

The thickness of the insulation depends on climatic conditions region and reaches 20 cm.

Depending on climatic conditions in your area, heat isolation Under the metal tile is chosen with a thickness of 15 to 20 cm.

The insulation is manufactured from mineral wool. It is produced in rolls or pressed plates.

Cutting the insulation is 10 mm larger in width than the distance between the rafyles. During the stacking, it is inserted into place and, starting from the middle, gradually pressing, trying to avoid crumpled and deformation. In this case, the insulation must fit tightly to the rafters, necessarily seal joints.

In order to protect the insulation from the moisture, which rises from the lower rooms in the form of vapors, you need to put the last layer of the so-called roofing cake. This layer consists of a polyethylene film, reinforced grid. It should be put up with 10 cm with a screw, starting below.

In order to finishing material The film did not touch, the planks are attached to it and the finish is attached to them.

Ventilation under the roof

The waterproofing film / membrane protects against moisture from the outside, vaporizolation - from the inner moisture. Installing such a double-circuit insulation provides the upper and lower output / air input.

Under the roof, ventilation must be arranged. This is caused by several reasons:

  1. With ventilation, moisture is removed from under the roof. The presence of moisture leads to corrosion metal structures And to the destruction of concrete and brick details.
  2. Ventilation levels the temperature under the entire roof and thus prevents the appearance of a land, as the roof and drainage system is damaged.
  3. IN summer time The temperature in the attic decreases.

Air for ventilation enters through the binder of the cornice, and the output occurs through the ventilated lip of the roof. If the air outlet is not provided in the skate, that is, a "deaf horse", then in this case it is installed roofing valves.

They are used both on cold and on insulated roofs under metal tile. Also there are valves that can be installed on the rod of the roof.

Errors with roofing device

Typical errors that need to be avoided during the device "Roofing Pie":

  1. In no case can not put vapor insulation film Instead of waterproofing. In this case, the moisture that fell into the insulation will remain in it;
  2. It is also impossible to put a film for waterproofing instead of vaporizolation. In this case, the roof will not "breathe".
  3. It is impossible to put the membrane-diffuser film on the contrary. And in this case, the moisture will fall into the insulation and will remain there.
  4. Be sure to comply with the number of all ventilation gaps In "Roofing Pie". Since the metal tile is very afraid of the appearance of moisture on her back side.
  5. Do not save on the arrangement of the roof. It has long been known that the miser pays twice. By purchasing cheap low-quality goods, in the future it will turn to you by expensive repairs.

It is much easier to do well immediately than to correct.

If you build a roof for all rules, it will serve you for many years, take care of your home warm in winter bad weather and give a coolness in the summer heat.

Professional flooring is a popular and truly justifying material for the construction of the roof, wall covering and other construction purposes. However, if you want the coating from the professionalist to fulfill its functions for all 100%, and its validity period corresponded or even exceeded the declared, it is important to take care of the hydro, vapor and noise insulation of the professional flooring.

Whether waterproofing is needed under the professional flooring - a question with an unequivocal answer, the most important waterproofing of the roof from the corrugated floor is most important, and what it will be, it is desirable to decide on the stage of building a project.

Any material under the corrugated floor, the purpose of which is its waterproofing, should be characterized by the following properties:

  1. Waterproof
  2. Mechanical resistance
  3. Heat-insulating quality
  4. Elasticity

Also, what steles under the corrugated floor should be well attached to the base of the roof to ensure the safety of the material even with strong wind gusts. In addition, desirable, although optional, the body of isolation of the professional leta is heat resistant, because the combination of insulation of the corrugated floor and its protection against moisture in a single material is perfect solution for home. Consider what kind of substrates under the professional flooring satisfy the above requirements and are best suited as a coverage.

Exists several varieties of waterproofing under the professional flooring:

  • Mastic waterproofing
  • Film waterproofing
  • Waterproof waterproofing
  • Tiled waterproofing
  • Sheet waterproofing
  • Plaster waterproofing

Mastic waterproofing

Waterproofing roofing mastic is perfect for flat roof. To apply such a coating under the default, it suffices to treat the surface of the roof with a polymer viscous tag product, which, after solidification, forms a solid elastic membrane, similar to monolithic rubber.

The mastic from polymers is noteworthy with its perfect clutch with concrete, metal and bitumen. The waterproofing roofing polyurethane mastic applied to a simple bulk method is characterized by high resistance to oxidation, corrosion, temperature change and aggressive media.

An unprecedented advantage of a mastic coating is the lack of seams as such. In addition, before applying mastic requires minimal preparatory work, After all, the coating is created directly on the roof. The use of roofing mastic is equally acquitted when waterproofing the roofs of residential and industrial buildingsBut this isolation is particularly relevant in the event of a passage through the roof of various building structures, such as stretching for the resistance of antennas and support for equipment.

Film waterproofing

The waterproofing film under the corrugated floor is poorly suited to stretch and tearing laminated polypropylene tissue. Some varieties of film waterproofing provide for a special perforation that serves to lead the condensate and steam, being essentially and vapor insulation under the corrugated floor. If water and snow fall under the roof of the building, together with water couples, they are discharged into the external space.

With the correct operation of the waterproofing roofing film, there is no increase in thermal conductivity and excessive humidification; In addition, such insulation has a sufficiently good resistance to temperature fluctuations.

Laying of the vapor and waterproofing rolled material of the IOSPAN under the professional flooring in the tight scanty roofs Protects the attic from the consequences of adverse weather phenomena, being an excellent example of modern filmproof waterproofing. We offer to watch a video about this interesting and convenient to use the material:

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Waterproof waterproofing

The inlet guide waterproofing is the most popular protection against the unwanted penetration of moisture and includes runneroid, polyester, pergamine, tol, fiberglass and similar materials. The main reasons for the widespread spread of the varieties of inlet waterproofing are in its affordable cost and simplicity of installation.

For example, the rubberoid under the professional flooring is attached to the roof makeup with screws or nails, although recently this kind of waterproofing is increasingly displacing the emerging novelties of the building market - polymer-bitumen waterproofing materials that do not have in its composition components inclined to rot.

Works on isolation with mastic and rolled materials are made on roofs with a slope not exceeding 60 degrees. The value of the angle of the slope is determined by the number of waterproofing layers, in particular, the layers of reinforced mastic. Insulating rolled materials can be laid on the base of different nature - wooden, metal and concrete. Sometimes styling isolation to the previous coating is allowed.

Tiled waterproofing

Some tiled materials can also provide good waterproofing and insulation of professional flooring. The best of them is the flexible bituminous tile. Installation of such a substrate under the professional flooring is very simple, while the material itself is quite durable and does not need special care.

The tile, made of a mixture of cement and quartz sand, has the same properties, over time only gaining its strength. But the ceramic tile is considered not very popular, because, despite its advantages, over time, such a material may begin to absorb moisture.

In the next video, you will learn how to install flexible bitumen tiles:

Sheet waterpower i

The sheet material under the corrugated floor is attached to the roof with welding or using dowels and screws. Plastic or metal sheets of waterproofing are made of lead, copper, aluminum, stainless steel, as well as from synthetic materials - vinylplasty or plastic.

Plaster waterproofing

Plastering roofing waterproofing is performed by applying polymer cement plaster - waterproofing material for the roof based on building mixtures and different fillers. Such a coating under the professional flooring is environmentally friendly, but over time this isolation can crack.

Comfortable accommodation in the house is impossible without a quality equipped roof. In order to reduce heat loss during the cold months of the year and create a favorable microclimate for people staying in the house, use different materials, including professional flooring.

Due to the multilayer roofing pie containing a layer of thermal insulation, heated air under cold weather conditions does not leave the room. Installation of vapor barrier under the roof professional flooring helps to maintain low thermal conductivity.

Why do you need vapor insulation under the professional

Many homeowners are interested, whether it is possible to cover the roof of a professional floorproofing without waterproofing, and why it is needed.

The vaporizolation layer in this case is equipped to achieve certain purposes:

  1. To protect the insulation from the penetration of wet evaporation. The fact is that as a result of its wetting, thermal conductivity occurs. In addition, the penetration of moisture leads to the destruction of the material.
  2. To prevent the liquid accumulation in the heat insulating layer and the direction of water vapor outside.


Water pairs are always present in the air of residential buildings. They are partially removed from the premises of the ventilation system, and the rest remain. Steamy warm air It rushes to ceiling overlap, where it is cooled, and the moisture appeared penetrates the roofing materials.

The insulation has a porous structure and therefore absorbs wet evaporation. In the process of wetting, the thermal conductivity of the material increases, and it is worse kept warm in the house. To prevent moisture penetration into the porous structure of the insulation, vaporizolation under the professional flooring is mounted.

The film for the arrangement of the vapor insulation layer is placed on the side of the premises to protect the material for thermal insulation and the elements of the roofing design from the penetration of vapors.

Features of the selection of material for vapor barrier

Let's think about which vaporizolation to choose for the roof so that its effectiveness is at the proper level, and the cost was available. The construction materials market presents a large range of special films for attic and cold roofs used for the device of the vapor insulating layer.

To take correct solution Regarding whether vapor barrier is needed under the professional flooring, it is necessary to own information regarding a number of factors:

  • cost;
  • efficiency of use;
  • feature.

Before, acquire materials under the profile flooring, it is necessary to deal with the financial side of construction. If the determining point is the price, then they choose economical products.


As for the effectiveness, the films for vapor barrier are characterized by operational characteristics and with them should be found in advance.

When selecting the material, the characteristics of a particular room take into account. For heated building, a foil film will be the best acquisition, and for the cold roofing from the professional flooring there will be quite inexpensive pergamine. When the roof is erected on the structure, which is attended occasionally, vapor barrier from polypropylene or conventional polyethylene film will be required.

Parosolation products for the roof

To put under a professional flooring or other roofing coating layer of vaporizolation, films are used.

The construction market presents the following most popular types of their:

  1. Polyethylene film. This inexpensive household material has long been applied as vapor barrier. It delays steam coming from residential premises. Polyethylene cheaper membranes and reinforced films. He has a big minus - insufficient strength, since it can be easily damaged upon installation. So that the insulation is reliable, the film is laid out in two layers. It is attached by a special stapler to the inner crate, observing step 1.0 -1.5 meters. In case of damage to the material, you need to make a patch. For this purpose, the place of puncture is stuck with construction tape. Also, check the joints.
  2. From polyethylene reinforced. It is inexpensive, but has good quality. It is made of several layers of polyethylene and strengthen the polypropylene grid for strength. Despite the low weight, such a film is strong enough and it is harder to damage in the fastening process. Due to the reinforcement, the material is tougher. Film is fixed using a special tape. Choice this material can be called optimal combination Affordable price and good quality.
  3. Pergamine. It is used to create vapor insulation for a long time. He is reliable protection From moisture, it has durability, has a long service life, but, unfortunately, he has a lot of weight. Despite the low cost, Pergamine is not recommended to use in residential premises. In the case of heating, the material begins to make an unpleasant smell, and after laying a professional flooring, its temperature is raised often. According to the above reason, Parchment is used when the answer to the question is whether the waterproofing is needed under the cornet of a cold roof of a non-residential attic, positive. It is convenient to apply for laying waterproofing over the crate.
  4. Polypropylene film. It is a durable material for vapor insulation stacked under the professional clothes. It is produced similarly to a plastic laminate film, but it has a relief layer. Condensate accumulates on films with a smooth surface, then it is going to drop and they fall from time to time. The film with a rough surface is produced on the basis of cellulose and viscose. It is able to absorb moisture and this feature prevents the formation of droplets. Further, subject to lowering the humidity of the air, the collected condensate evaporates. Mount the film by the anti-condensate surface to the room. For correct execution mounting work It is necessary to explore the instructions from the manufacturer of products. This type of film is one of better options Devices of vapor insulation for a straightened.
  5. Foil. In essence, it is a variety of polyethylene or polypropylene products. She has not only a reinforcing mesh, but also a thin layer of aluminum, which reflects infrared rays and helps to keep warm. As a result of using a foil film, heat loss decreases by more than 10%. The cost of such an insulator is higher compared to other types of vapor insulation materials, but its installation allows you to save on heating costs. It is also necessary to know which side to fix vaporizoation correctly. Put a foil film by aluminum coating towards the room. There should be a gap of about 5 centimeters between her and wall decoration of the walls. There must also be a small gap to the insulation. To fix the film use self-adhesive ribbon, and the joints are covered with aluminum scotch and then the vaporizolation layer is sealed.

Waterproofing of cold roofs - is needed

The space under the roof of the cold type is not heated, but the temperature inside is always different from the outer. For this reason, the bottom of profiled sheets is going to condensate. Therefore, the answer to the question: "When a cold roof is built whether waterproofing is needed?" Unknown. Of course, you need. Correctly laid waterproofing on the roof under the corrugated floor will exclude moisture in the undercase.

This layer will not allow wet evaporation to enter the wooden elements of the rafting system and other parts of the roofing design. Waterproofing is placed on top of the rafted and then secure the counterclaim. Next, mount the crate and professionalist.


When the waterproofing layer does not prevent the output of the steam to the outside, then the steam barrier for the cold roof is not needed. Rising upwards, water vapors get through the film under the professional flooring and dried in the place due to the movement of air flows. In this case, runneroid, polypropylene, pergamine and polyethylene are not suitable. For cold roof, experts recommend using a nonwoven steaming membrane.

Device of vaporizolation

Do you need vapor barrier for a cold roof? No, since it is equipped only for warm roofs, so that moisture does not get into the insulation.

The pair insulation layer panels laid about 15 centimeters. For the selected type of film, the connecting tape is selected. Small slats for it can be wooden or metal.

mOB_INFO.