Foundation walls
Are mostly below ground level. Protrude from the earth at a height of 30 - 50 cm. In homes, they are also cellars cellar walls. Their thickness should be adjusted to the planned thickness of the walls above the ground. In the case of houses, which assumes a two-layer construction of the walls or foundation walls skeletal light are usually about 25 cm. When the construction is planned three-layered wall, you will need to increase the thickness of foundation walls up to more than 50 cm.
Foundation walls can be made as monolithic or as a brick.
Monolithic walls are poured on site, which requires the use of formwork. For pouring concrete walls shall be of class B15 or B20 and can be additionally reinforced. If you choose the variant brick (mostly used), we have to choose concrete blocks, silicate blocks, bricks or hollow ceramic fill