Foam concrete – a lightweight concrete type – it has been known for more than thirty years in its principle. It is a building material with good mechanical strength, low thermal conductivity, simple but highly technological processing directly in the site. Foam concrete contains confined air pockets thus reducing its weight substantially and achieving savings in material inputs. As a building material, it meets all expectations to spread in a building practice first of all in the area of making floors of civic and industrial buildings. Variability of possible characteristics and a wet process in production offer a wide range of applications of foam concrete as a floor levelling layer and a filler of various dead spaces