Insulation of the foundation of a wooden house with polyurethane foam
The first method is cheaper, since there is a lot of land left when digging the foundation. But this method has a minus, this is low thermal insulation. Therefore, it is more profitable to sprinkle expanded clay, which fill the box by 40 cm height. But then there will be no basement in the house, but it will become possible to place communication and its ants underground underground.