Abstract: A module especially intended for being laid on floors, and possibly also walls or ceilings, is provided. The module comprises a base plate of a cellular light weight material and a fire proof cover plate. The underside of the cover plate is permanently connected to a lateral surface of the base plate using an intermediate bonding material. The module includes two elements, the base plate and one cover plate that comprises a wooden material, such as a hardwood. The elements are assembled to form a flat unit in a plank or parquet patten. The plate is of a thickness between 2 and 6 millimeters and is impregnated with a fire retardant agent. The other lateral surface of the base plate is uncovered, with the reverse surface of the base plate being free.