Roofing foam or plastic foam is a type of construction material used to mold concrete joists. Raw materials of this type are expandable polystyrene surfaces, which are standard approved and commonly used in the construction industry of condensate grids. Ceiling monoliths are commonly used in two different sizes on ceilings. * 200cm used on concrete ceilings and other types with dimensions of 25 * 100 * 66 * for ceilings with metal joists or so-called chromite