Vapor barrier for walls of wooden houses: the installation features

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 It destroys the tree, causing the formation of mold and fungi, changing the shape of logs, provoking the development of cracks and leakproof joints. 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 the 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.

Useful advice!Glued or CYLINDRICAL timber even at the production stage loses most of the moisture, the factory default dimensions and grooves can achieve considerable tightness at installation walls, which allows not to apply 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 It 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.

Useful 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

Laminated plastic coated with aluminum film or aluminum foil (thickness more than 0.02 mm) is not only provide a vapor barrier, but also reflect the heat inside the house, providing the optimum level energy saving.

Related article:

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 domestic house warmingThat, 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 for frame housesIt differs sufficiently simple 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, it is necessary to leave between the insulation and paroizolyatorom 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.