Vapor barrier for walls of wooden houses

Posted on 30.01.2018 in name of category by

Vapor barrier for walls of wooden houses

Comforts housing depends on the temperature and the humidity in the room. In a wooden house that can be achieved by heating and insulation quality. In addition, to reduce the negative effects of moisture on the walls, floor and roof, you need to control the amount of vapor barrier, and this is a difficult task.

Excess moisture adversely affect the wooden structure of the house. Allocated using the shower, cooking, washing, wet cleaning couples looking for a way out of the room. Since it is much greater than atmospheric pressure, the steam pressure on the ceiling, wall, floor, which together with the difference in temperature favors the formation of condensate. Slowly impregnating wooden frame and sealing water distorts and destroys them: materials rot, moldy, their performance falls.

If in the process of preparation of the boards for the roof and walls was carried out of steam and waterproofing materials for the lag and floor boards do not have this protection. In addition, sexual flooring of the first floor of the house settling on the ground, which increases the negative effects of moisture on it. In order to avoid the process of destruction of the wooden house construction, should take care of a reliable vapor barrier. The protective layer will insulation and prevent moisture contact with a tree, freely releasing air from indoors to outdoors. Thanks to this operational life at home will increase significantly.

The advantages of the vapor barrier wooden houses

Wood (even untreated) has a high degree of thermal insulation and good permeability. Naturalness of this material provides an opportunity to build houses without fear that harmful vapors are released into the indoor air. In addition to the benefits, the tree has significant disadvantages. The ability to collect moisture implies a decrease of heat resistance level and provokes the expansion timber. The appearance of mildew on the walls and other parts of the house deteriorates the aesthetic characteristics of the dwelling and can cause various diseases tenants.

As a result of the regular wetting and drying of the wooden structure is deteriorating sealing joints, so that they become air-rinsed. If the vapor barrier wall for a wooden house is not provided, the materials passing humid air through it and retain the moisture therefrom. To improve the working conditions of the walls and other elements of the timber should be placed parogidroizolyatsionny barrier at the junction of the warm air and cold walling.

building materials market offers various types of Hydro, which have excellent characteristics. Typically, to protect the walls of wooden houses by use of moisture breathable mebrany and films, however, there are other types parogidroizolyatsii. What materials are suitable for thermal insulation and a vapor barrier housing:

  1. Roofing material. The advantage of this type of material for waterproofing - is low cost, but the roofing material more suitable for installation on the roofs of farm buildings, rather than to protect the walls of wooden houses. In addition, such means is not appropriate to use as the main vapor barrier, but as an additional layer to the more effective materials.
  2. Aluminium foil. The film with one side coated with metal, the other has a reinforced grid. This arrangement helps to create indoors vapor barrier and a layer which reflects heat. To insulate wooden house, foil vapor barrier creeps metallic coating to the outside. To put on the walls of such material should be careful not to damage its integrity. If you decide to foil his house, housing will not only be protected from corrosion, but also insulated.
  3. Diffusion membrane. The vapor-permeable material protects the housing from moisture, regulates its amount due to its ability to pass air (with two or one side). Vapor barrier membrane has a high vapor permeability coefficient, which is caused by the microstructure of the material. A significant advantage is the lack of diffuse film between the insulation and the membrane vent lumen provides maximum efficient use of space. Such a vapor barrier for walls of wooden houses provide good insulation of the room. Unlike other types of vapor barrier, the membrane has a high price - it's the only drawback.
  4. Polyethylene or polypropylene film. Compared to polyethylene, polypropylene is more durable, resistant to atmospheric phenomena. However, the vapor barrier film of the material used to have a significant disadvantage - from insulation prevents condensation on it, leading to a rapid loss of performance of such a vapor barrier wall. Modern type of material has a special layer of viscose cellulose content. It absorbs large amounts of moisture, gradually dries under air ventilation. The main advantages of the films for walls of wooden buildings is their democratic cost, durability, ease of installation.

Features installation of a vapor barrier for walls of wooden houses

Vapor barrier is attached not only to protect the walls of the home from moisture, but also for the purpose of warming the room. Mount Technology material depends on the site of its application. Builders can put a vapor barrier on the outer or inner side of the wall, depending on the condition of the building, such as logs, other factors. There are certain characteristics of installation Parobarer at fastening material on the inside or outside.

If the walls of the house are made of round logs, the ventilation gaps can not be left: their function is performed by the gaps at the junction of the boards. If the structure is made of smooth wood with a rectangular or square section, put a vapor barrier directly on the wall can not be - it will lead to the difficulty of the steam outlet. In this case, the first timber rack stuffed into 2.5 cm (step therebetween is 1 cm). Once installed crate, on which lay the insulation. It stretched over the waterproofing film, and only after that you can start decorating the walls.

If done correctly, it works in the room remained within normal climate, which is ideal not only for the type of log houses, but also for the frame structures. The described method of mounting the outer vapor barrier for walls is simple, so it can be done independently, without the involvement of qualified builders.

For internal insulation of a wooden house

The first stage of the inner packing implies stripping vapor barrier wall surface followed by their treatment with an antiseptic. Further, according to the instructions set slatted crate. The lumina rails disposed heater (e.g., mineral wool), over which the nail or stapler is attached vapor barrier. If for this purpose is selected diffusion membrane, its stele directly with the insulated material or leaving between the insulation and vapor barrier in the lumen of 5 cm. The film must be stretched well, otherwise the protective properties are poor.

Where to order and how much vapor barrier wall

The material for insulation and vapor barrier wooden walls can be purchased in DIY stores. The widest choice presented in specialized hypermarkets. In addition, the vapor barrier can be ordered online, but make sure personally as a product you can purchase only upon receipt. How much is a vapor barrier for walls of wooden houses? Below is a table with examples of prices for materials from different manufacturers.

For what and how to make steam, the walls of wooden houses

Vapor barrier for the exterior walls of a wooden house need for insulation of mineral wool. This insulation is very susceptible to moisture. Due to the high hygroscopicity it is able to accumulate a water. This significantly reduced the heat-shielding properties of the material. To prevent unpleasant consequences you must protect from moisture mineral wool on all sides.

outside using wind and waterproofing for protection against water. It prevents erosion of insulation and hit him rainfall. Also typically provide a ventilated air layer thickness of about 50 mm, which allows the surface insulation divert dangerous condensate.

Appointment of a vapor barrier wall

But the design of the cake walls of the house, please note that moisture can flow from the inside of the building. This is especially true for wood or any other structure constructed from vapor permeable material (e.g., frame). For protection from moisture inside the vapor barrier is applied. It is necessary to prevent the movement of vapors inside the walls of the house and does not allow the mineral wool type moisture.

In the construction market represented a great variety of materials for the device or a vapor barrier wooden frame house. All of them are divided into two major groups:

Also, the new material has appeared, which is a obmazochnuyu insulation. It is a liquid rubber. The solution consists of the polymers and is used in a liquid state. After application of the surface must be allowed to dry. The result of the work will be the film that is impermeable to the vapor or liquid. But the walls of a wooden or frame house such a vapor barrier is not applicable. It will be a modern alternative to the usual materials in the construction of buildings of brick and concrete.

For the case in question need traditional insulation roll materials. Before starting work, is required to find out what films are different from the membrane, and what better to do vapor barrier for insulation of mineral wool.

The use of materials of this type has become popular for a long time. As the simplest embodiment builders use all customary film of polyethylene. Polyethylene in this case may be smooth or perforated. Experts recommend to use the first type of vapor barrier. The material thickness must not be less than 0.2 mm. A vapor barrier walls of the house is recommended to choose a two-layer films.

Mounting polyethylene film

Plastic materials have a sufficiently large number of drawbacks. The disadvantages include:

  • low tensile strength material is easily damaged during installation;
  • Low lifetime;
  • preventing air flow (generated greenhouse effect), it is necessary to pay greater attention to building ventilation.

If the film during mounting holes or cracks appear, the protective capacity will drop significantly. For this reason it is necessary to carry out the work accurately even with reinforced films. advantage of polyethylene - low cost and high availability (can be purchased at almost any hardware store).

Second Embodiment films - polypropylene. They are similar in appearance and properties to polyethylene, but denied a number of shortcomings:

  • increased strength;
  • longer life;
  • resistance to overheating;
  • reduced risk of cracking.

polypropylene film

The disadvantage is the higher cost and the same low air permeability, like propylene.

Vapor walls of wooden houses of polypropylene can have a special anti-condensation coating. On the one hand the material has a rough surface. The moisture is retained, and after evaporating. When using such a film must provide clearance between the wall and the lining inside the house.

For areas where it is required to provide increased efficiency of heat conservation, often apply a film with an aluminum layer. Such materials are able to reflect the heat back into the building than ensure high thermal insulation. This steam is suitable for wall bath or sauna.

Best embodiment to protect the insulation from moisture vapor barrier membrane would be inside. It is important not to confuse it with other materials with similar names:

  • parodiffuzionnaya membrane;
  • superdiffuzionnaya membrane.

These materials are used only for the waterproofing and insulation attached externally. They are designed to prevent the ingress of moisture in the insulation, but do not prevent the movement of the pair. This possibility needs to vapor liquid does not accumulate inside the mineral wool. When installing the waterproofing of serious problems in the operation of the building instead of the vapor barrier may arise.

Vapor barrier membrane is not only to protect the insulation from moisture, but also allow the house to "breathe"

Production of vapor barrier membranes are engaged in many companies. Often they are found in the product range of companies engaged in the manufacture of mineral wool and waterproof protection. This material is a nonwoven fabric and has the following positive features:

  • reliable barrier dangerous for a couple of insulation;
  • good air permeability, does not lead to the greenhouse effect in the building;
  • safety for human health;
  • environmental friendliness.

The disadvantages include relatively high cost. Choosing which the membrane is needed, it is necessary to pay attention to its strength. There are species that do not have good resistance to tearing, mount them need special care.

When installing it is important to strictly follow the order, which side faces the material insulation. It is necessary to adhere strictly to the manufacturer's recommendations.

During the construction of wooden houses, steam is fastened from the inside, wind and hydro - outside. The exception may be cases where the heater is fixed on the room side. But this option for new construction is undesirable. This is due to the fact that the rules of insulation material must be secured by the cold air. Deviate from this is possible only if there is a compelling reason.

The circuit layers of the wall of the wooden house

Before starting work on warming the walls of a wooden house should be cleaned on the outside surface from dirt and dust. To fix the vapor barrier material required to prepare the metal staples or nails. All fasteners must be protected from corrosion of the zinc coating.

Sizing joints webs of material need a special tape. When mounting the film to save money often use tape construction.

Bonding tape seams

When the films and membranes mounted outside and inside the premises is required to follow a few rules:

  • webs are attached to the wall in any direction, the pattern;
  • overlap of one layer to another should be at least 10 cm;
  • tape width sizing of joints - of at least 10 cm;
  • near the window apertures necessary to provide a small margin considering the deformation (it is a fold);
  • Konami near the material should be protected from sunlight (this is particularly unstable polyethylene).

Vapor barrier walls of the house is fixed braces on the cleaned surface. After that, the material of the carcass rail are installed for covering the insulation and installation. Competent protection of mineral wool from all types of moisture will prolong the service life of the building.

Vapor barrier for walls of wooden houses: the materials and features of the installation

Fashion to build environmentally friendly housing predictably regained its former popularity houses made of wood. This natural material has undeniable advantages: it is economical, durable, aesthetic, characterized by low thermal conductivity and allows you to create the room a very special microclimate. However, fungus, mold and humidity can negate all these advantages. The way out of the situation will become vapor barrier for walls of wooden houses.

Insulation film is attached to a wooden frame by means of brackets

Why do we need a vapor barrier for walls of wooden houses

One of the distinctive features of wood is its ability to "breathe." The simple wooden houses built in the old way, it is enough to provide sufficient steam circulation between the inside and the street.

In modern houses play an important role not only environmentally friendly, value and beauty, but also compliance with energy conservation standards. Because of this, an ordinary wooden wall has become, in fact, in the multi-layered cake made of beams, insulation, waterproofing materials and finishing.

Such layering prevents the free flow of vapor. As a result, it accumulates in the insulation, deforming it and reducing the thermal insulation characteristics, and the condensate is gradually destroys the tree, causing formation of mildew and fungi, changing the form of logs, provoking the development of cracks and joints leakproof. Thus, it became necessary to add one more layer in the wall cake - layer vapor barrier.

Example arrangement of insulation and vapor barrier wall of the wooden house

However, even in a modern wooden house, steam is not always required. Flitches, polulafet, chopped with an ax or a hand-sawn timber from its inherent natural high humidity can dry for many years, not allowed to move to the inner workings. In this case, setting the vapor barrier makes it possible to save significant construction time, protecting the material from rotting and mildew, as insulation - the accumulation of moisture.

Helpful advice! Glued or CYLINDRICAL timber even at the production stage loses most of the moisture, the factory default sizes and grooves allow to achieve considerable tightness when mounting walls, which allows not to use a vapor barrier.

All the exterior walls of a frame house should be protected from moisture

Also pay attention to the material used as insulation. For example, mineral wool, one of the most common insulating materials absorbing moisture, gradually begins to settle, is deformed, and its protective properties decline. This involves the mandatory use of a vapor barrier. In contrast to the mineral wool, foam plastic is placed in such a way that the joints are sealed, and the vapor barrier material completely impermeable to moisture.

The main types of materials used for vapor barrier wooden house

The choice of material for the vapor barrier wall depends on many factors: how you plan to insulate the house - from the outside or from the inside, from the condition of the building, on the financial capacity, the type of insulation.

Reinforced film has an increased density

Most democratic view of the vapor barrier is polyethylene (preferably reinforced) film. It is available at a price, but it is no different strength and durability. Its main drawback - full of air and moisture resistance, which leads to the accumulation of moisture on the surface and significantly reduces its vapor barrier properties.

Helpful advice! Polypropylene film lacks some of the drawbacks of the polyethylene film. It is stronger, and its constituent cellulosic fibers prevent the formation of condensate.

Steam insulation film is available in rolls, making it easy to work with

The laminated plastic film coated with aluminum or aluminum foil (thickness exceeding 0.02 mm) not only provide a vapor barrier, but also reflect the heat inside houses, ensuring an optimal level of energy saving.

Insulation for walls of the house from the outside under the siding: choose the material and the method of installation. Select the type of insulation. Features of the materials, their advantages and disadvantages. Basic installation steps.

Combine steam and thermal insulation characteristics foil polymers (foamed poliprofen and penofol) and fiberglass.

outside also often used roofing material, and the choice is to stop on the bitumen, coated on both sides for the vapor barrier wall of the wooden house.

Pie walls of a frame house

Excellent performance has diffusion membrane. This durable air-permeable material can have multiple layers, it is one-sided and two-sided, and further provides hydro and thermal insulation. Its disadvantages include the high cost. In addition, it is not suitable for steam insulation exterior walls.

Important! Do not confuse a vapor barrier and waterproofing. Waterproofing prevents the penetration of water and steam condensate formed prevents and promotes good air circulation.

The edges of the vapor barrier film combine overlapping

Recently gaining popularity vapor barrier for walls of wooden houses izospanom - quality vapor-permeable membranes and films with different strength and density. Simple and clear guidance in the use of a vapor barrier izostan instructions that make it easy to carry out their installation even inexperienced builder.

Features installation of a vapor barrier for walls of wooden houses

Vapor barrier - an important milestone on warming homes. Technology its installation depends on whether it is an external or internal insulation of houses, which in turn depends on the condition of the building, the type of logs and so on. D. So, if you want to warm the old wooden house and improve its appearance, a heater mounted outside. If a house or a new phase of exterior trim is finished, the house insulated from the inside.

Vapor barrier properties of the insulation complements and extends the life of the whole structure

Installation of a vapor barrier for external thermal insulation of a wooden house

When installing a vapor barrier on the outside wall of the house of round logs, you can not leave the ventilation gaps. Their role is to fulfill the void at the junction of the logs themselves. If the house was built of smooth beam with a square or rectangular cross-section, the vapor barrier be laid directly on the wood can not. This will cause the steam circulation disturbance. Into logs must fill slats thickness 2.5cm with a pitch of 1 m. And only then can put vapor barrier material, fixing it with the staple gun.

The protective film prevents ingress of water vapor on the heat insulation material

Then, set crate, which is placed insulation, top tensioned waterproof film finally transferred to an external fine finish.

This option allows you to save a special atmosphere in the room due to the fact that the tree does not hide under the finish inside the house. It is suitable not only for the log, but also to frame houses is different enough simplicity that allows the vapor barrier on the outside of the walls of wooden houses with their own hands.

When properly installed, the membrane, the moisture comes out of the premises and does not get back

However, there are certain disadvantages. The wood must be completely dry, which can take more than one year. Therefore, this option is not very suitable for the new building. In addition, the joints need to be sealed, caulked grooves on both sides, and only water-repellent materials can be used as a heater. The service life of such a structure is different durability.

Installation of a vapor barrier with an internal thermal insulation of a wooden house

There is also a way to generate a vapor barrier for the laying of wooden walls inside the house. To do this, the walls are thoroughly cleaned and treated with an antiseptic composition. Set on top of the crate slats. Between heater strips stacked, and a vapor barrier is mounted on top of it. It is attached with staples or staple gun nails with wide hats.

Examples arrangement for framing a vapor barrier wall and the wall of the timber

If a vapor barrier is used as a diffusion membrane, it is placed directly on the insulation. Otherwise, you need to leave between the insulation and paroizolyatorom a distance of about 5 cm. The film should be taut, otherwise its protective properties decline. At a vapor barrier attached cladding, and have put on it the finish interior trim. The distance between the lining and the film should be at least 3 cm, otherwise the free circulation will be broken, and the accumulated film on the moisture will not evaporate.

General rules everything vapor barrier for walls of wooden houses

There are a few general rules to enable well-select the material and carry out its installation.

Canvas vapor barrier is recommended to mount a metallic tape or staples

To prevent the ingress of moisture, the film is fixed overlap at least 2 cm. Stack it can be in multiple layers, but the total vapor barrier layer should not exceed 4 mm. The joints should be sealed using a special adhesive tape. If a vapor barrier foil is used, apply a metallized tape.

It is also important to figure out which way to lay a vapor barrier. In other words, determine which side of the vapor barrier wall of a wooden house is an interior and what the exterior. For example, the film is to be installed in a lighter side to the heater. Similarly, the smooth side paroizolyatora always fit to the insulation and fleecy - out. Always fit inside the shiny side of the vapor barrier consisting of an aluminum layer. When the insulation of external walls of the smooth side of the material to be against the wall, and the rough should always be facing the street.

Metallized rough side of the web should be directed to the room

Thus, we found out how important it is to prevent the formation of mold, mildew and excessive moisture in the wooden house. Vapor barrier for walls, provided a competent arrangement, not only prolong the life of the building, but do not allow it to spoil the aesthetic appearance.

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