The foundation, although the most invisible part of the house, is worthy of your attention, because it is your basis. And thermal insulation for the foundation is a very important factor that you should by no means lose sight of. There are very classic methods, tested by time, such as expanded clay (do not forget about concrete milk), there is also pasting on bitumen mastic, but it should be used if you have a basement and then not always.
There are more modern methods, such as basalt wool, staple fiberglass, extruded polystyrene foam is the first durable, does not give shrinkage, and what is the main plus – it does not burn and is also environmentally friendly. Such a heater can be bought in bulk at any construction store. Vatu is better to use as a heater with impregnation, coupled with water -repellent compositions, and we recommend that you protect it with vapor barrier material (from the inside).
Stapel fiberglass is also in great demand (has a good chem. counteraction and antibacterial property) is also the best sound insulator.
Extruded polystyrene foam is the most durable, it also well withstands sharp temperature differences, is also very moisture resistant, therefore it is very suitable for insulation of basement of basements and insulation of the foundation.
In conclusion, we can say that thermal insulation of the foundation is not rarely 10 – 15 percent of the cost of the total construction, also that such work (with all the foundation) is recommended in the summer.