Waterproofing layer (Waterproofing)
A layer that prevents sewage and other liquids from penetrating the floor, as well as groundwater from penetrating into the floor. According to SNiP 2.03.13-88.
A layer that prevents sewage and other liquids from penetrating the floor, as well as groundwater from penetrating into the floor. According to SNiP 2.03.13-88.
Gypsum (from the Greek gýpsos - chalk, lime) mineral, aqueous calcium sulfate salt CaSO 4 · 2H 2 O; in its pure form it contains 32.56% CaO, 46.51% SO 3 and 20.93% H 2 O. Crystallizes in the monoclinic system. The structure of the gypsum crystal lattice is of the layered type. According to TSB.