Roof waterproofing film, selection and installation. Roof waterproofing film.

Waterproofing Yutafol D 96 Silver

Waterproofing Yutafol D 96 Silver is a film designed to protect the under-roof or facade space and is a two-layer laminated perforated polypropylene film.

Waterproofing Yutavek 115

Waterproofing Yutavek 115 is a subroofing three-layer polypropylene superdiffusion membrane, which consists of two outer layers of non-woven textiles that provide high strength, as well as an inner layer that provides waterproofing superdiffusion ability.

Waterproofing Tyvek® Soft

Waterproofing Tyvek® Soft single layer non-woven high strength polyethylene. Tyvek Soft is weather resistant and highly breathable due to its fine weaves.

Waterproofing Tyvek® Solid

Tyvek® Solid waterproofing is a single layer non-woven polyethylene made of hundreds of fine premium fibers. It is highly resistant to weathering and, if necessary, is laid directly on the insulation.

Tyvek® FireCurb Housewrapt Hydro-Windproof

Tyvek® FireCurb Housewrapt Hydro-Windproof is a state-of-the-art membrane that protects buildings from the spread of fire in case of fire. Thanks to the additional flame retardant coating.

Waterproofing Tyvek® Supro Tape

Waterproofing Tyvek® Supro Tape is a very strong (polyethylene + polypropylene), two-layer roofing film that is mounted on thermal insulation or continuous decking without ventilation gap.

Hydro-wind protection DELTA® VENT N / DELTA VENT N PLUS

Hydro-wind protection DELTA® VENT N / DELTA VENT N PLUS is a three-layer premium membrane with excellent vapor permeability, thanks to which the entire structure, including thermal insulation, will always be dry. A film of this level easily copes with snow and rain.

Hydro-wind protection DELTA® VENT S / DELTA VENT S PLUS

Hydro-wind protection DELTA® VENT S / DELTA VENT S PLUS is a very strong three-layer diffusion membrane, the peculiarity of which is laying on thermal insulation without a ventilation gap or on a continuous floor.

Waterproofing DELTA® MAXX / DELTA MAXX PLUS

DELTA® MAXX / DELTA MAXX PLUS waterproofing is an energy saving roofing membrane. In addition to the fact that this film performs its standard functions - it removes condensate vapors from under the roof space, it also has serious, unique advantages at the same time - good diffusion and anti-condensation properties.

The film will help to avoid these problems and save a lot on roof repairs. What are the main functions of the materials used for roof waterproofing? They serve as protection against heavy rainfall at any time of the year.

A wide variety of types and manufacturers of waterproofing film. But the technological rules for its installation are applicable to almost all types. To prevent the roof from leaking, waterproofing must cover its entire area, including cornices and gables. The bottom web of material must extend beyond the eaves and at the same time be mounted with an overlap. If there are pipes and walls on the roof, then the waterproofing film should adjoin them closely. With this laying technique, the roof will last you a long time, and the house will always be warm and dry! We have a large selection of roof vapor barrier films, and we also suggest that you familiarize yourself with the section of adhesive tapes for vapor barrier.

Video instruction for installation of Tyvek waterproofing film

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The main task of roof waterproofing is to protect the under-roof space from moisture penetration from the outside. Water causes rotting of wooden roof elements and a decrease in the performance of wet insulation. Let us consider in more detail the tasks that waterproofing measures and their technologies should solve, depending on the materials used.

The feasibility of roof waterproofing

In addition to the direct fall of precipitation under roofing materials, there are other options for the appearance of moisture drops on the elements of the roofing pie:

• Due to the temperature difference outside and inside the insulated roof on the inner surface of the row roofing materials condensation is formed. Roof waterproofing protects the insulation from condensation.
• The "dew point" can be formed directly in the insulation itself. Therefore, a ventilation circuit is required on the roof, the type of which depends on the material used for waterproofing. There can be two such ventilation circuits - between the roof and waterproofing and between waterproofing and insulation material. With good vapor permeability of the waterproofing material, the gap between it and the insulation is not required.

Properly arranged waterproofing must meet the following requirements:

• The hydroprotective layer is located over the entire area of ​​the roof together with the eaves and overhangs of the gables.
• The lower sheet of waterproofing is displayed in the drain.
• The roofing waterproofing material adheres tightly to the walls and pipes located on the roof.

Before starting waterproofing work, it is necessary to select the material that is optimal for a particular type of roof. General requirements for waterproofing - moisture resistance combined with vapor permeability, resistance to mechanical damage and elevated temperatures, elasticity. Consider modern materials used to protect the roof from moisture and meet the listed requirements - under-roofing films and membranes.

Types of waterproofing films for roofing

For roof waterproofing, perforated films are used, which are laid between the top coating of the roof and the insulation material.

Features of using perforated waterproofing films:

• The increased degree of vapor permeability, in comparison with non-perforated specimens, is still insufficient for the full removal of steam from the premises. Therefore, at the slightest damage to such a film, moisture will accumulate in the insulation.
• In dry weather, the micro-holes of the films become clogged with dust, due to which the vapor permeability of the material decreases. The polymers used in the production of films are prone to electrification, which causes a rapid accumulation of dust. Colored films are less electrified.
• Installation of waterproofing films in residential buildings with a warm roof requires the creation of a lower ventilation gap.

Waterproofing films are divided into polyethylene, polypropylene, with an anti-condensate layer. Polyethylene and polypropylene waterproofing materials are divided into reinforced and non-reinforced.

Utafol D films consist of three layers - two outer ones made of polyethylene film and the main one in the form of reinforcing mesh, can be used for all types of roofs

• Anti-condensation waterproofing films are commonly used for metal roofs, such as non-acrylic metal roof tiles. On such roofs, there is a high probability of condensation, leading to the occurrence and development of metal corrosion.

The anti-condensation film has no perforation and is not breathable.

This film does not allow steam to pass from the heat-insulating material to the lower surface of the roofing material and settle on it. All steam is absorbed by the textile waterproofing layer. Therefore, the lower ventilation gap between the film and the thermal insulation is mandatory for weathering the settled condensate.

Polymeric membranes - implementation of innovative technologies

Membranes are relatively new materials and their properties resemble natural material- skin. The membranes have a non-woven structure, which has the ability to pass all the steam accumulated inside the room, but prevent the penetration of external moisture into the under-roof space. Such waterproofing can be placed directly on the insulation material without organizing a ventilation gap. Condensation will not form on the thermal insulation.

Membranes are widely used in houses with heated attics, especially with attics. These are the best materials for converting cold attic spaces into heated attics without changing the truss structure.

A large number of names are used for membranes, but several main types can be distinguished by vapor permeability:

• Pseudo-diffusion membranes are perforated roofing films. The level of vapor barrier of such materials is insufficient for their laying without a ventilation gap.
• Diffusion and superdiffusion membranes can be installed without a ventilation gap.

For slate roofs, you can use both a cheaper film and a superdiffusion membrane. A gap is required between the film and the insulation, so an additional crate will be required. The superdiffusion membrane is laid directly on the heat-insulating material. The total cost of an effective waterproofing device will be approximately equal. But the membrane is a higher quality material.

According to the installation technology, the membranes are divided into the following types:

• Single-sided materials are rolled across the rafters with a certain side up.
• Membrane waterproofing of double-sided application can be mounted on the crate (for pseudo-diffusion modifications) or directly on the insulation of either side.

One of the ways of laying membrane material on the roof

Main characteristics of diffusion and superdiffusion membranes

General properties of vapor-permeable membrane materials:

• Waterproof and vapor permeable, which is not reduced in dusty environments due to the absence of holes.
• The membrane for insulation additionally plays a windproof role, preventing heat from escaping to the outside.
• Installation of membrane waterproofing directly on the insulation saves under-roofing space and funds for additional lathing.
• The membranes are used in combination with roofing materials, the inner side of which is not subject to corrosion - ceramic, bituminous, cement-sand tiles and metal tiles with a polymer base. The membrane allows steam to pass to the inner surface of the roofing and, with a difference in external and external temperatures, condensate forms on it, causing corrosion of the metal.

Properties of separating diffusion membranes

This class of membrane waterproofing occupies a separate niche and is used for metal roofing - steel, aluminum, copper, galvanized steel.

Separating diffusion membranes are optimal for low-pitched roofs, the roofing of which is made of zinc-titanium alloys. Also recommended for complex roofs with domes and towers.

This waterproofing material is a non-woven membrane made of polymeric materials. The structure is a volumetric three-dimensional lattice with a height of 8 mm.

The cost of under-roof waterproofing and vapor barrier protection is up to 5% of the total cost of the roof structure. At the same time, from a competent choice of insulating material and its correct installation the working condition of the roof and the duration of the repair-free period largely depend.

We invite you to discuss the issue of choosing compositions and roll materials to protect the roof from the penetration of precipitation and the effects of condensate.

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The value of the roofing mainly lies in protecting the roof from rain and snow, but with its slight mechanical damage, the level of efficiency of the entire structure is much reduced, which is manifested in the penetration of moisture into the cake and the gradual destruction of wooden elements, insulation.

In addition to moisture coming from the outside, internal condensate may also appear, which is formed due to a significant difference in temperature conditions in the insulated under-roof space and outside it - on the street. Whatever building materials the developer did not use, when laying the roof, they all contribute to condensation, therefore roll waterproofing for roofing is one of the best options for additional protection of insulation from moisture.

In addition, the formation of a “dew point” is possible in the insulation fiber itself, as well as on wooden roofing elements, therefore, a ventilation system must be equipped in the roof structure, through which water vapor particles will evaporate until condensation forms in the under-roof space.

Ventilation also involves the use of roofing and waterproofing materials, depending on which one or another type of system will be equipped. The ventilation structure can consist not only of an inter-roofing and waterproofing circuit, but also of a second circuit located between a layer of insulation and waterproofing.

An indicator that waterproofing soft roof arranged correctly, in compliance with building requirements, it is considered:

• waterproofing under all gable overhangs and cornices, as well as other roofing elements;
• removal of the lower waterproofing sheet beyond the cornice strip, that is, into the drainage system, or to the frontal board;
• reliable adjoining of the hydro film near the pipes and walls located on the roofs.

Requirements for the arrangement of the roofing vapor barrier layer

Any dwelling has a number of factors that contribute to the appearance of water vapor, which, according to the laws of physics, tend as high as possible - to the roofing pie, where they penetrate into the insulation and reduce its performance.

Another important quality of the vapor barrier is the level of its resistance to tearing, which is especially evident in the case of:

1. Loss of elasticity of the insulation layer, when its weight is transferred from the rafter system to the vapor barrier material, which should provide for the possibility of such a situation and withstand additional load. These nuances must be foreseen even before.
2. With mechanical deformations of the roofing cake, the film is responsible for the integrity of the vapor barrier.

The level of penetration of water vapor is quite high, so the vapor barrier should be equipped taking into account all the nuances, for example, carefully sealing the joints of the sheets of vapor barrier material, as well as adjoining it to the rafters, chimney, ventilation and other roofing elements.

Before proceeding with the arrangement of the hydro- and vapor barrier layer of the roof, it is necessary to select a waterproofing material for the roof that matches the specific design:

• polyethylene film for a high-quality hydro and vapor barrier;
• polypropylene material - it is suitable only as a waterproofing film, it is absolutely devoid of vapor barrier properties;
• for high-quality roof waterproofing, you will need a "breathing" non-woven membrane.

Description of the main waterproofing materials

Depending on the location of the future house, its structure will be affected by different climatic conditions, which are fraught with a destructive effect, so the fact of low or high temperature will be less dangerous than their abrupt change. In addition, the difference between the roof structures themselves, as well as the level of their load on the waterproofing layer, is important.

• creation of a barrier to moisture penetrating into the layers of insulating material, which, because of this, significantly loses its thermal insulation qualities and begins to gradually collapse;
• use as the main component in ventilation system roof, contributing to the removal of the formed moisture with the subsequent elimination of its formation.

Roofing waterproofing film is excellent for the construction of a pitched roof, on which the coating is not laid with a continuous carpet. Such a coating can be made of any tile, metal materials, slate. In addition, the film reliably protects the roof from the external effects of rain, snow, condensate penetrating under the coating layer during strong winds or heavy rain.

The use of vapor barrier films is mandatory on both flat and pitched roofs with any coating, since only due to them the thermal insulation will be protected from moisture. As a result of human activities, for example, cooking, washing, washing floors, boiling water, water vapor is formed, which, under convection and diffuse influence, tends to the roof space.

Characteristics of materials protecting individual elements of the roof

The presence of important characteristics of the roof in the form of efficiency, safety, functionality, directly depends on which waterproofing to choose for the roof, as well as for its additional elements indicated in the photo.

To date, the list of modern materials used to make a waterproofing layer and high-quality surface protection from negative factors is constantly increasing.

These include bituminous waterproofing of the roof, as well as various roofing mastics different from traditional materials:

• excellent adhesion to any type of surfaces;
• high level strength;
• long service life even with constant negative impact;
• impeccable water resistance.

The presence of special properties of the material make it possible to use it as a reliable protective layer both for the structure as a whole and for each of its individual elements. During installation, it is important to take into account the possibility of combining the waterproofing used with the roofing (finishing layer).

As soon as the developer decides on a specific roofing material for coating, then immediately you need to choose a waterproofing material that transmits or absorbs moisture.

The membrane film is tightly placed to the insulation without the need for lower ventilation gaps.

If you decide to build a house yourself, then remember that, being milestone in this work, roof waterproofing provides reliable protection design, and is also an indicator of the effectiveness of its functioning.

Subject to the technology of laying the waterproofing layer, the correct selection of materials for it, you can be sure of keeping the heat indoors and comfortable staying in the house for several decades.

The presence of moisture in the under-roof space can be associated not only with atmospheric phenomena. It may also be internal condensate, which comes out with inside roofs due to the temperature difference between inside and outside. Regardless of the existing reasons, waterproofing the roof will help protect the structure from undesirable consequences. Film insulation is considered the best option.

To ensure the complete dryness of the insulating material, building codes require a combination of vapor waterproofing films for the roof. The legitimacy of such a requirement becomes obvious if you clarify for yourself what is the difference between a vapor and waterproofing film:

• waterproofing protects the thermal insulation from moisture that enters from the outside and removes condensate;
• The vapor barrier protects the thermal insulation from vapors that penetrate through the ceiling of the interior into the thermal insulation. The vapor barrier must be securely adjacent to the insulation.

A waterproofing material is considered to be of high quality if it:

• waterproof;
• mechanically strong;
• heat-resistant (temperature regime ranging from minus 40˚ to plus 80˚);
• elastic;
• resistant to ultraviolet.

The waterproofing film goes on sale in rolls - 1.5 x 50 meters weighing approximately 9 kg.

Characteristics of roof waterproofing film

• UV resistance. Why is it so important? Many materials in this category lose their strength and become brittle when exposed to ultraviolet radiation. It is not uncommon for a truss structure, which is already covered with waterproofing, but still without a roof, to remain in the open for some time during the construction of a roof. This time may be enough for the structure of the insulating material to begin to break down. As a result, its protective qualities, for example, strength or moisture resistance, will be in question.
• Service life set by the manufacturer. a rather laborious process and, of course, the owners rely on its durability. Today you can buy waterproofing film from a variety of manufacturers. Experts recommend passing by products that do not indicate the service life, or it is small. The best option may be materials from those manufacturers who are well known for the proven quality of their products.

On a note

The most reliable are multilayer films with a reinforcing component. Among other similar materials, they are distinguished by high strength and reliability.

• Anti-condensation. The effect of "anti-condensation" is necessary, since it is on it from the side of the under-roof space that condensation forms.

Anti-condensation waterproofing films for the roof they have a cellulose layer, which is able to both absorb moisture and retain it, and in large quantities. As soon as the air temperature rises or other favorable conditions are created, the moisture accumulated there begins to evaporate. This process is facilitated by ventilation gaps,.

Anti-condensation membranes have higher characteristics of density, strength, UV resistance, rough surface. However, such insulation is characterized by low vapor permeability, so the presence of ventilation gaps on both sides is mandatory.

• Vapor permeability. A material with such quality characteristics is necessary for capital insulation of the roof or for a future attic. If this requirement is neglected, then due to the condensed moisture accumulated in the insulation, favorable conditions will be created for the formation of mold, and the effectiveness of thermal insulation will also drop sharply.

When you can use any waterproofing film for the roof. However, if the dimensions of the attic allow, if desired, to adapt it to a residential area - big square and height, it is better to initially take care of the appropriate choice of material.

The price of a waterproofing film with such qualities is higher, but when you eventually decide to equip a living space here, the “extra” expenses will return to you with interest.

Varieties of films for waterproofing

Hydro vapor barrier materials are presented on the market in several varieties.

Polyethylene

This is the most popular version of waterproofing film for roofing. The price of the material is acceptable for people with different incomes. Polyethylene-based materials come in several types with their own characteristics. - Ordinary high density waterproofing film. As a rule, its thickness is not less than 200 microns. It is water and air tight. Since it does not allow steam to pass through, ventilation is provided due to the gaps that are formed between the film laid on the counter-lattice, the insulation and the roof.

• Perforated film. It has microscopic holes. Due to good vapor permeability, vapors pass through the insulation without lingering. Such material is also known as a hydrobarrier or anticondensate membrane. It will be an excellent solution for waterproofing under metal tiles or corrugated board.
• Reinforced three-layer film It is characterized by high strength due to the presence of a middle layer made of fiberglass mesh. It is closed on both sides with dense polyethylene. The material can be securely fastened to the rafters, while it sags exactly as much as necessary to better remove excess moisture from the under-roof space. However, it does not differ in vapor permeability.

Polyprene membranes appeared on the domestic market in the early 90s. Finnish manufacturers usually supplied them together with metal tiles. As practice has shown, when using material for insulated roofs on the side facing the thermal insulation, condensation often forms. Since this may disrupt the humidity and temperature conditions in the roofing cake, work on improving the polyprene waterproofing film continued.

They began to apply a hygroscopic layer of cellulose and viscose on it, which could completely absorb the resulting condensate. This layer must face the thermal insulation during installation. At the same time, it is necessary to form a gap of at least 5 mm between them, which is necessary for ventilation.

glassine

Although today there is no lack of modern materials used for waterproofing, many of the developers prefer to use glassine for this purpose - cardboard, which is impregnated with refractory petroleum bitumen saturated with a plasticizer. It is worth noting that glassine can be present in the roofing cake in two qualities:

• vapor barrier thermal insulation from the interior;
• waterproofing under the roof covering.

Varieties of roofing glassine have different markings:

Diffuse membranes

This type of waterproofing, on the one hand, will adequately protect the roof structure from the penetration of precipitation, and on the other hand, it will not prevent steam from escaping from the roof pie.

The material achieves a high degree of vapor permeability due to the perforated structure. A "breathable" roofing membrane is a type of non-woven fabric made from synthetic fibers.

The waterproofing layer can be laid directly on the thermal insulation, which allows you to do without the control lathing and save on it. On the market you can find not only one-sided, but also two-sided membranes. This fact should not be overlooked when buying and installing waterproofing material.

The only drawback of this material is its high cost relative to other materials of the same purpose. In all other respects, this is the best way to install waterproofing.

According to the degree of vapor permeability, they are divided into three classes:

• diffuse with medium vapor permeability,
• superdiffuse have the highest degree,
• pseudo-diffuse ones have low vapor permeability and require a mandatory ventilation gap between the layer of hydro- and thermal insulation.

A small overview of the modern market

In the domestic market, films for roof waterproofing are presented in a wide variety. Certain brands have long established themselves as reliable waterproofing in different climatic conditions. We note among them - waterproofing films Yutafol, Isospan, Technonikol, Ondutis, Yutacon and others. They differ in their technical and operational characteristics, but they are supplied to the market in rolls of the same size - 1.5 x 50 meters.

Watch the video on how to install a waterproofing film on the roof.

Long gone are the days when roofs were made of reeds or reeds. Now such buildings can be seen only in some historical museums. A modern roof is a whole set of materials that make it durable, warm, and waterproof. An important role in this is played by a waterproofing film for the roof. What is it used for? What types are there? What can "tell" its price? How to choose a film for a specific roof?

The importance of waterproofing material

None of the roofing does not protect the house from moisture penetration by 100%. It can penetrate through the joints of slate or ondulin. The wind can blow it under the tiles. Steam rising from living quarters can also wet roofing materials. The problem becomes more obvious when equipping an attic for an office or a billiard room - it is damp and cold there, despite the insulation. To solve all these problems, a waterproofing film for the roof is designed.

Important! From a competent choice and proper installation of the film, the safety of the entire roof depends on 50%. An important role is played by the price, and the properties of the material associated with it.

What properties to look for when choosing

Often the cost of a waterproofing film is 5% of the price of the entire roof. But it’s not worth saving on it, because if the budget material quickly deteriorates, you will have to remove the roofing and re-lay the waterproofing. And this is already costly and troublesome. It is better to immediately choose a film that will fit the type of roof and satisfy basic needs. What properties do modern materials demonstrate?

The film is used when covering the roof for both residential and non-residential use of the attic. In the second case, you can save on the price of the material, but if you subsequently want to convert the attic into an attic, then the cheap film and the laid insulation will not cope with their task. It is better, if opportunities allow, to immediately buy a film for a “warm” attic. Further, the following factors must be taken into account.

UV resistance

This property must be taken into account when building in the height of summer. Workplace film is hidden from sunlight. When installing the roof in spring or autumn, you can not think about this factor. But when working in hot weather, it must be taken into account that the exposure of the stretched film to the open sun can reduce its performance. A sudden power outage, a shortage of roofing material, or problems with the crew can lead to downtime. A film with low UV resistance quickly loses its properties and becomes more brittle. The result is quick wear and poor waterproofing qualities. It is better to choose options starting from 3 months of stability.

Waterproof

This property should be paid special attention to those who build a house in a region with heavy rainfall, or owners of a roof with metal tiles. Drops of rain and snow will seep and blow under the roof. Frequent contact with water depletes the life of the film faster. Therefore, you should choose a material with lamination. Its price is higher than simple analogues, but such a hydrobarrier will not have to be changed after 5 years. It is indicated by numbers from 0.3 to 5 meters of water column. The recommended value is 2-3.

tear resistance

The parameter is written indicating the transverse and longitudinal values. Starts at 70/165 N/5cm. The optimal figures are 275/375 N/5cm. This will affect the installation process. The film is fastened with a stapler and leaves holes. Gusty wind can damage the material initially. The ingress of melt water also creates a load. By choosing a product with optimal performance, you can count on a long service life.

combustibility

It is denoted by the letter "B" and the numbers 1, 2, 3, 4. The smaller the number, the better. Films with a value of 1 do not burn on their own, but are only subject to melting from the temperature of the fire from other elements. A material with a value of 2 only burns for 30 seconds and self-extinguishes.

Anticondensate

Well suited for metal roofs, under which moisture droplets often collect. The double-sided film is laid with a smooth plane on the outside, and a rough one on the inside. The peculiarity of the installation is the exposure of gaps of 50 mm on both sides of the material. This is achieved by stuffing the corresponding rails. Films absorb incoming moisture, and ventilation contributes to its removal. The price of the product is higher than the budget, but is justified by the lack of flammability, durability, and resistance to UV rays.

Reinforcement

The material has an internal "frame" made of polyethylene mesh. This gives tensile strength. The film is able to withstand strong winds and act as a drainage for water falling on it. Has microperforation. It tolerates high and low temperatures well. It is laid between the rafters with a sag of 2 cm.

Self-adhesive strip

The rolls are equipped with adhesive tapes along the edges, which facilitate the installation process and do not leave holes, as when fixing with a stapler. The price is higher than the usual film and is beneficial for personal work. Special attention it is necessary to pay attention to the sealing of complex structural elements.

Steam conductivity

An important factor showing the ability of the material to pass through itself the steam rising from the living quarters. Measured in grams per square meter missed in one day. They are divided into low and high vapor permeability:

• The first include products with indicators of 25-40g. During installation, a gap of 50 mm from the roofing material and from the insulation is required. The ventilation space will dry out moisture that has not passed through, which will not allow other elements of the roof to deteriorate.
• The second type of film has indicators of 700-3000g. It is superimposed on the insulation, without a ventilation gap due to the easy conductivity of steam.

Important! Films with any properties will reliably cope with their task only if they are installed correctly. The roll is untwisted and the material is fixed across the rafters, from the lower edge of the roof. The overlap between the strips is 7-9 cm. The degree of sagging between the rails and the presence of a ventilation gap are individual.

Materials and types of films

The substances used for the manufacture of waterproofing roofing materials directly affect their basic properties. Several industrial products of this sphere stand out in the construction market.

Polyethylene films

They occupy the budget segment from the range of waterproofing. They are used in covering unheated roofs. They have a water resistance of 0.1-0.3, a strength of 170/190, and are able to tolerate UV rays, without loss of quality, from 1 to 3 months. Their counterparts with an additional layer of reinforcement are used in waterproofing roofs with "warm" attics. The tensile strength indicators are 600/450. The price of the material is 20% higher than unreinforced.

Polypropylene films

Polypropylene materials are next in the price category. They are harder to wear than their predecessor. Resistant to high temperatures. Melting occurs after 175°C. The substance does not crack due to prolonged contact with moisture. Water resistance 0.3, strength of the reinforced type 640/500. UV resistance up to 6 months.

Improved versions of polypropylene waterproofing are complemented by a foil layer, which increases the strength of the structure and the preservation of heat in the room. The material can be produced inner layer anti-condensation, which increases the service life and drainage characteristics. Good for metal roofs. The rising steam does not come into contact with the cold metal tile, but is absorbed into the rough layer of the film. Moisture is vented through a special bottom gap of 40-60mm.

membranes

The leaders in terms of functional features are membranes. Waterproofing material made from polyvinyl chloride. It has good flexible properties due to plasticizers. The strength is provided by a mesh of polyester necessarily included in the composition. Widely used in the installation of roofs for residential premises. They are practical in that when converting an existing cold attic into an attic, they do not require changes in rafter system. The material conducts steam well and can be laid directly on the insulation. There is no need for a gap for moisture weathering.

To reflect sunlight and low heat, a filler, plasticizer and stabilizer are added to the top layer. The dye is titanium oxide. The reverse side of the film is not exposed to heat rays, so it is made in dark color. The service life is more than 20 years. There are four types of this building product:

Diffuse membranes can be fixed under the entire height of the rafters. The composition contains special stabilizers to slow down the aging of the material. The building product is self-extinguishing.

Conclusion

The modern construction market offers a wide range of waterproofing. When choosing a material, it is necessary to take into account the type of attic space, the type of roofing, and the weather conditions of the region. By choosing and laying the film correctly, you can save not only the roof, but also the heat in the house for a long time.