Is polystyrene good?
A tree is a material that "breathes", and this is the main advantage of wooden houses. Therefore, there are doubts about the insulation of the house made of wood with polystyrene foam. Some people claim that it is possible and necessary to do this, others are sure that under the foam plastic tree will begin to rot. However, experts say that it can be done, but only a "breathing" heater. Otherwise, you will deprive the building of its advantages.
There is a rule that says: the vapor permeability of materials towards the street should be increased so that there is no obstacle to the moisture outflow. If this rule is neglected, moisture on the boundary of the dense material will condense, which leaves the room, which hi to the formation of condensation and rotting of the wood. Therefore, vapor permeability is a very important factor when choosing a heater.
Polyfoam has a vapor permeability lower than wood, so this is not the best option for warming. But with the organization of a qualitative ventilation system, the amount of the exhaust steam will be minimal, hence, there will be no harm from it. Therefore, if you have a well-designed ventilation, then the foam plastic can be used to insulate a wooden house.
Important! In no case do not use this material to insulate buildings and buildings with high humidity( baths, saunas, kitchens and so on).
Installation process
Before starting insulation, it is necessary to check all joints between logs or beams. If the insulating material is unevenly lying, then update it and fill the voids with mounting foam. Further, vertically the boards are nailed to the wall, so that their outer surface is at the same level with the plane of the wall. If there is a need, then it will be necessary to shred separate logs. In the center of these boards are nailed rails, which will serve as a frame. The step of installing the slats should be 5 millimeters less than the width of the insulation.
The foam is then inserted into the frame starting from the bottom. If the frame distance is correctly maintained, the material will be retained in it due to interference. If the sheets fall out, they should be fixed with wedges of foam or nails. The main condition is that there are no gaps between them. Then a diffusion membrane is placed on the material. It is fixed by a stapler, and joints are pasted with adhesive tape. After that, you can wall the wall with the selected facing material.
Important! When installing the diffusion diaphragm, carefully read the instructions for use in order to fit the right side to the heater.
How to glue the foam to a tree?
Understanding how to insulate the house with foam plastic, it is necessary to dwell in more detail on the methods of fixing it. There are several ways to do this:
- Fastening between the crate due to tension( as described above);
- Mounting with special nails( fungi);
- Fastening with adhesives;
- Fixation with mounting foam.
The use of special nails - this is often a common practice when installing insulation, because they securely hold the sheets. But it has a drawback, which is the need to putty all the places in which nails are hammered. It is also necessary to take into account the fact that metal nails will act as an additional bridge for the cold, because the metal conducts it well. To solve this problem it is possible with the help of plastic fungi.
Adhesive compounds do not have problems, like nails, but when choosing them, you need to be very careful. So, the glue must be necessarily resistant to moisture and temperature changes, otherwise it will be useless. Most often, cement mortar with glue is used for this. As for the mounting foam, it is rarely used for fixing, basically, it is needed to fill all the slots.
Tip! It should be noted that the most effective way of fixing is to "plant" the sheets on the grout and further strengthen them with nails.
