Abstract: A resolving issue of manufacturing an underlay mat enabling the easy installation, which meets high requirements regarding utility properties and durability despite low costs of materials and production, as well as good tolerance by the natural environment. This task is fulfilled by the underlay mat for floor coverings, which contains: the foamed polystyrene layer, the PET (polyethylene terephthalate) film on the top side of the polystyrene layer, the layer of adhesive applied on the PET film and the removable protective layer applied on the layer of adhesive.

Abstract: A baseboard having an installation section and a cover section. Included are a bottom shelf, a middle shelf, and a top shelf expanding from its surface in the same direction. The end of the bottom shelf is bent towards the middle shelf. The middle shelf is bent in a part of its width towards the top shelf and, in a larger part of its width, the middle shelf is bent towards the bottom shelf, while the top shelf is bent in a part of its width towards the middle shelf and, in a larger part of its width, the top shelf is bent out upwards. The external surfaces of the bent sections of the ends of the bottom shelf and of the top shelf form a flexible lock. The elements of the mounting part and the cover part form a top chamber and a bottom chamber.