Tips from the specialist
MEHABIT can easily be installed under mastic asphalt and wet floor screeds as well as under so-called dry subfloors (flooring panels such as chip boards, OSB boards or cement fibreboards).
Sufficient moisture protection is important. According to DIN 18195, all concrete layers in direct contact with the ground must be protected/insulated against rising damp (e.g. PVC films or welded asphalt sheeting). In the event of residual moisture from the concrete surfaces, a film must be applied below the insulating layer as a moisture barrier. Moisture barriers are required on new concrete surfaces (PE film) or above damp rooms or open thoroughfares (PVC film). However, they must never be used inside wooden beam floors in order to avoid possible condensation damage. MEHA fills must be stored in a dry place.
As a general rule, dry subfloors may only be installed once all work on windows, heating and plastering is complete and the rooms have dried out.
We strongly recommend the floating installation of all floor systems, as this enables significantly better solutions in both a structural and acoustic sense.Sound insulation requirements are normally easily met when employing the floating installation method.
With MEHABIT, the insulating and levelling fill can be walked on with care. When ordering the insulating material, you need to take into account the compressibility of 10-12% as well as any unevenness of the floor.
Special smoothing board, special rammer, rake, gauges, spirit level, metal straightedge, wedges.
If there are larger joints in the substructure through which the material could trickle away, trickle protection (e.g. MEHAFIPP) must be provided (no film = risk of condensation damage!).
After smoothing and compressing and before applying the covering, the evenness of the fill must be checked using a straightedge and a spirit level; edge zones can be topped up if necessary.
MEHABIT should at least be covered with MEHARIPP (or preferably MEHASOL) so that the granulate is not pushed into tongue and groove or spigot and socket joints; paper of any kind or films are not suitable for this. For fill heights of 80 mm or more an 8 to 10 mm-thick, pressure-distributing wood fibre insulation board (MEHASOL) must be used.
Chip boards / OSB boards with tongue and groove joints and a thickness of 18/19 mm or preferably 22 mm are to be installed at an offset and glued around the circumference; for extremely high fill levels, boards with a thickness of 25 mm or two layers are required. Please note: in the event of high humidity, cover the panels until the top layer is installed (to protect from moisture) in order to prevent warpage. For cement fibreboards with shiplap edge, too, the fill must be covered with MEHARIPP/MEHASOL.
Should you have further technical questions, please call our hotline – we will be happy to help you!+49 (0) 6235 9255 - 14