Substrates on floor joists can be built on raw concrete ceilings and on beam ceilings. They are suitable for laying chipboard as a substrate, as well as for making other elements of dry screed, like for example. plasterboards and plasterboards. It is also possible to directly lay the elements of the finished parquet on the floor joists provided, that they will be of the correct thickness. Regarding the spacing of the floor joists, follow the laying regulations of the manufacturer of chipboards or finished parquet.
On raw concrete ceilings, a polyethylene foil of a thickness is first laid 0,2 mm. The contacts of the adjacent strips must thereby coincide in width 30 cm.
Then, the edge strips of the insulating material are placed over the provided spacing of the floor joists or. on existing floor joists. In order to avoid the transmission of the noise of footsteps to the adjacent walls, edge strips of the insulating material should also be placed on the walls.
The floor joists are laid loosely on the edge strips of the insulating material and leveled with a spirit level, as well as by placing pieces of plywood. Floor joists must not be mounted on the ceiling or on ceiling joists, because then the insulation against the sound of footsteps would be reduced again.
Mineral fiber boards are suitable for professional thermal and noise insulation, hard foam, cork or soft felt. They should fit as precisely as possible between the floor joists. For this purpose, the width of the insulating materials should be selected in such a way, that it exceeds 1-2 cm spacing of floor joists.
A specialist advises
An even better insulating effect can be obtained with boards made of insulating materials,arranged in two layers, located with staggered joint slots.