Then the rest of the expanded clay is poured between the guides and is leveled by the rule according to the guides. When the layer is distributed over the surface, you can lay the GSP. In order not to damage the expanded clay layer, it is recommended to lay small pieces of plywood, drywall or the same GSP under the feet. The slabs are glued together by PVA and fastened with self -tapping screws at a distance of 10 cm from each other. Each row of GSP is installed with a displacement between themselves (as when working with a laminate).