Particle boards with grooves and tongues are used for the construction of dry sleepers. There are three types of stacking:
• leveling old wooden floors,
• laying on floor joists or ceiling joists,
• laying on dry ballast or insulation layers on the entire surface or on beams.
Examples of construction of substrates. The numbers mean: 1 – Chipboard, bolted to floor joists or wooden floor; the – Chipboard laid floating, glued contacts; 2 – Wooden floor; 3 – Ceiling beams; 4 – Floor joist; 5 – Sound insulation strips and boards; 6 – Corrugated cardboard or fibreboard as cover plates; 7 – Moisture insulation, polyethylene film 0,2 mm; 8 – Dry ballast as leveling; 9 – Ewent. papa, vapor-permeable as protection against condensation; 10 – Mineral wool as a footfall sound insulation board; 12 -Flat raw ceiling.
For the correct installation of the chipboard, follow the instructions below:
• Maintain a wall distance for all types of installation 2 mm per running meter of area, however, at least 25 mm. This distance serves as an expansion joint and allows the necessary ventilation of the rear sides of the panels. It may be filled with edge strips of insulating material.
• Skirting boards must not hinder the expansion and bottom ventilation of the panels. The finished floor covering must not cover the edge gap.
• Vapor barriers are always required above massive ceilings. Thick polyethylene films are suitable for this 0,2 mm, whose contacts overlap at least on 30 cm are glued or welded. The walls must be fitted with a vapor barrier to the top edge of the finished floor. It must not be damaged when laying chipboard.
• A vapor barrier must never be installed above wooden beam ceilings or wooden floors. This could lead to the formation of moisture in the wood, and thus to its destruction.
• Screw fixing should only be carried out with special chipboard screws. The distance between the screws on the edge should not be greater than 20 cm, and the screw spacing in the center of the boards should be approx. 40 cm. The distance between the screws and the edge must be more than five times the screw diameter.
• Gluing the boards with a tongue and a tongue is best done with the so-called. klejami PVAC (white synthetic resin adhesives) as long as possible. The glued boards are pressed against the surrounding walls with the help of wedges, po 24 at. the wedges must be removed.
• Floor coverings should, if possible, be installed immediately after the boards have been laid.
Otherwise, the boards must be covered with polyethylene foil. This prevents the surface of the boards from drying out excessively, as well as preventing the boards from getting dirty during subsequent works.