Vapor barrier for walls of wooden house inside and outside

The Traditional material for building houses – it is a tree. It has been used in the past. Seeking eco-friendly accommodations, modern people increasingly pay attention to this stuff. But the installation process was different. And because of this today we have to use additional building materials. These include vapor barrier for walls of a wooden house. About what is it and why use talk in this article.

Why you need a vapor barrier?

In the old days, a house made of wood did not need additional insulation or finishing. Its insulating properties were sufficient to allow air circulation between indoor and outdoor. Wood simply “breathe”, and that was enough.

Today, all work is performed in accordance with defined requirements and calculations. Therefore, in addition to environmental friendliness and attractiveness of the wooden house should conform to the standards for energy efficiency. And this has led to a change in the concept of “home of wood”. Currently, it is often “pie” of several layers of construction materials.

Of Course, the air is difficult to Wade through all these layers. Free circulation is disturbed. Delayed pairs within this “cake”. The result is condensation build up inside. The result is that the insulation layer is wet.

The Materials used for insulating, moisture lose their properties, become deformed. In addition, condensation causes the appearance of mold and mildew on the tree. As a result, affects the structure of the material. The wood starts “out”, the joints of the logs are broken.

Understanding of this process has necessitated the use of a protective layer. To do this, and is a vapor barrier for walls of a wooden house.

How does the wall “pie” frame type

To fully understand why is a vapor barrier for walls of a wooden house, it is best to understand all the layers of “cake”. If the house is built of frame type, it looks “pie” as follows:

• Finishing of the premises;

• Vapor barrier interior walls of a wooden house;

• Frame;

• Insulation;

• Insulating layer (wind, moisture);

• The home's exterior.

Vapor barrier for the exterior walls of a wooden house is also to protect the structure from wind and moisture.

The building of whole logs

The Use of logs changes the commit order of building materials, characteristic of buildings of frame type. In these cases, the vapor barrier is placed for the walls of a wooden house outside, not inside.

On Top of the logs is lined with an insulating layer. Then constructed the frame for the insulation. This is most often used wooden beams. Further fastens the waterproofing layer. On top of this is laid a layer of the finish. As the latter can be used in any suitable building materials. Their choice today is very large. It all depends on preferences and financial capabilities of the owners of the building. For example, this holds the vapor barrier for walls of wooden houses under the siding.

Types of vapor barrier

As a vapor barrier layer can be used for several construction materials:

• Polyethylene, which has a thickness of one millimeter. This is the easiest and cheapest option. But it has one drawback. The fact that the film completely covers the normal circulation of air. As a result, walls can't “breathe”. To use this type of material should be very carefully. It is easily torn. It is not necessary to pull it too tight. Otherwise, the inevitable seasonal expansion of the materials can cause damage to the film.

• Vapour barrier mastic breathes and retains moisture, not allowing it to get inside. It is applied immediately before the finishing of the premises.

• Membrane film – the best option. Insulation protects against moisture, while air circulation is carried out in the right amount.

The Most common vapor barrier for walls of a wooden house of the third type. It is a protective membrane. So take a closer look at its characteristics.

Optimaloption

Vapor barrier membrane is an innovative material that appeared not so long ago. Its main advantages are:

• Perfect protection from moisture.

• The Air passes through the membrane, which prevents the emergence of so-called greenhouse effect.

• Completely safe for humans.

• Does Not emit harmful and dangerous substances.

At the stage of selection of building materials should pay attention to the issue of strength of the membrane. To reduce cost, some manufacturers reduce this figure. When using such membrane is easily torn. Who needs a damaged vapor barrier for walls of a wooden house?

Which side to put a membrane – one important caveat. Should be strictly monitored, so that the vapor barrier was lying exactly as required by the manufacturer. If you expand it by the other party, it will not bring the desired effect.

Methods of attachment of the protective layer

For the construction of the home can be used timber of various kinds. Depending on this vapor barrier for walls of a wooden house on the outside can be mounted in two ways.

The First is used in situations where the logs are round. The protective layer can be attached directly to the log.

For logs with a rectangular or square cross-section such is not an option. In such situations, the log jams rake about two and a half inch wide. Between them observed interval of the order of one meter. The vapor barrier is attached to the installed rails.

Using a vapor barrier inside the building

Protection from moisture is provided not only on the outside of the building. Also fits the vapor barrier for walls of wooden house inside. The entire process will look as follows:

• On the inner side wall sheathing is attached from the tree. To do this, use bars with a width of five centimeters.

• Next lined with a layer of waterproofing. In between the wall and this film is formed the gap. It is necessary for ventilation.

• On the boards lathing waterproofing through fastened metal sections.

• In the resulting between the profile cell is placed a heater.

• On Top of all the closed vapor barrier membrane. It is laid out overlapping. The joints are sealed.

• Completes “pie” siding that is covered by the finish trim.

Laid out so the vapor barrier for walls of wooden house inside will prevent condensation in the “cake”.

Things to remember during installation

It is Very important before fixing the vapour barrier to properly prepare a wooden wall. To do this, all joints and gaps must be completely sealed.

Outside the building, vapor barrier material should not fix tightly to the wooden wall. It is necessary to maintain the openings between the vapor barrier and trim. They are necessary for air circulation. Thanks to them, the condensate film will go away naturally.

In the case of frame building, the situation is exactly the opposite. For insulation is not required a rigid wall. It is mounted between the bars, from which the collected frame. As a result, two thirds of the wall is insulation. Therefore, it must be carefully protected from moisture. Otherwise, the material will lose all of its insulating properties and other features. Deformation of the insulation will lead to the appearance of cracks.

Rules of installation vapor barrier

To Achieve maximum effect from the use of a vapor barrier membrane will help to follow some simple rules:

• Pattern on the membrane should be facing you, not the wall.

• Separate insulation parts are mounted overlapping. They should find each other no less than ten centimeters.

• Rolled material in a horizontal direction only.

• All joints sealed. For this purpose they are glued with tape, which should be more than ten centimeters.

• Ribbon are glued and also complex design elements: corners, niches, ledges, openings of Windows and doors and so on. Tape glued all mating surfaces. This will improve the tightness.

• Near the Windows it is necessary to reserve membrane, so that during deformation of the insulation is not damaged. The stock is in the form of folds.

• Material must be fully protected from contact with the rays of the sun. This is especially true in the proximity of window openings.

• Method of attachment of the vapor barrier depends on the material. Filmpolyethylene and polypropylene are fixed conventional construction staples or nails. That the material is not damaged, it is recommended to nail him with wooden planks. With their help, the vapour barrier is pressed against the crate. On top of all this is fixed. The membrane is more stable and does not tear as easily. But it can be fixed in a similar way.

Most common mistakes

Vapor barrier will not perform its functions if the installation process was made. The most common errors are:

• The wiring is sloppy. This implies poor sealing joints, the presence of a large number of folds, the damage of the material by mechanical means.

• The Material is chosen correctly. When choosing insulation, consider exactly where it will be mounted inside or outside. For example, diffuse membrane suitable for internal use only.

• The Effect of a double vapor barrier. Arises from non-compliance with installation technology. Some types of materials are tightly secured to the wall. For others you need to collect the crate.

Manufacturers of vapor barrier materials

Many modern companies produce films for vapor barrier. The most popular of them are:

• “ut” brand “Jutafol” and “Otabek" (Czech Republic).

• ‘Megasol”.

• "DuPont" of the film "Tyvek" (USA).

• ‘Ausrep”.

• “FAKRO" (Poland).

• “Dorken”, which produces a vapor barrier under the brand “Delta” (Germany).

• “Closer” (Germany).

Vapor barrier for walls of a wooden house “Izospan” from the company Gexa worth it to mention it separately. This company produces several types of vapor barrier materials. They can be used inside or outside for walls or ceiling, for “pie” with insulation or without.

Vapor barrier wooden houses will help to maintain comfortable conditions in the room and greatly extend the life of the building.