Without preparation, everything will go wrong
You decided to make your own insulation at home, and the question is how to insulate the house from the outside with polystyrene foam? The exterior finish of the house with polystyrene begins with the preparation of the walls. The walls can have a different evenness, and you need to fix it. So, if there is a 200-by-200-millimeter section on the surface, a 20-millimeter deep space, then under the heater there is a void, which means if you hit it, the material breaks and a hole appears.
The same situation applies to the protruding sections. Therefore, the whole wall needs to be aligned so that there are no more than 15 millimeters of difference on it. Another important factor in preparation is the material of the facade surface. If the facade is painted and the paint is moving away, then it is necessary to clean the old paint. After stripping, the following actions are carried out:
- Slide your hand over the wall, if there is no dirt on the palm, then the wall can not be primed.
Note! In general, the use of a primer is very large, and the costs are justified, so it is not carried out only with very severe austerity.
- If the palm remains a chalky trace, then the wall must be primed;
- If sand or other particles are deposited from the wall, the surface should be cleaned and primed.
Any primer can be used. You can perform this process with both a brush and a spray. However, it is better to do this with a brush, because in the process the wall will once again be cleaned. But when the walls are strongly shed, it is more appropriate to use a sprayer.
How to glue foam for insulation of walls from the outside?
The correct plating of the house from the outside with polystyrene foam is to glue the material and nail it. So it is necessary to do, and such a system justifies itself. Glue the foam from the bottom. There the starting bar is installed, which is fastened fast mounting to the wall. You can start work and without slats, but with them the work will be performed better, as the material will have less shifts.
As long as the glue does not dry, the sheets of foam can move up to 10 centimeters, so the lower sheets must be firmly secured on something. For gluing a large and small spatula is required. Small is needed to apply the adhesive to a large spatula. If the wall is flat and has no differences more than 10 millimeters, then the mixture can be applied to the comb, if there are large differences, then the mixture is put as cement.
Important! The mixture must be applied to the wall, not to the sheets of foam.
In places where there are cavities in the wall, it is required to impose more mixture, and on the protruding sections, on the contrary, it is less. If the mixture is applied to sheets of foam, some parts of the material will hang in the air absolutely not fixed to the wall. In addition, the foam with the applied solution becomes much heavier, which complicates the installation process.
Nail insulation for greater reliability
Next, finishing the house from the outside with polystyrene requires nailing the insulation with special "fungi".This should be done three days after pasting, when the glue is completely dry. If you start to nail before the mixture is completely dry, the sheets will move away from the wall."Mushroom" is a plastic circle and a leg, and also a nail, which is hammered into this sleeve. Nails can be both metal and plastic. However, it should be taken into account that metal nails are an additional conductor of cold, and the price for them is higher than for plastic ones.
The holes for the "fungus" are made at the corners of the sheets at the joints, and one in the center. In the required sections, a perforator creates holes 10 mm in diameter and 2 cm deep deeper than the length of the "fungus".If the depth of the hole is made equal to the length of the "fungus", the debris that is formed during drilling will not give the "fungus" a normal and reliable foothold. The length of the fasteners is defined as follows: if the thickness of the foam plastic is 10 millimeters, we add 50 millimeters for the "fungus", so we get 60 millimeters.
Important! The hat of the "fungus" is clogged so that it is flush with the foam and does not stick over it.