Subfloor requirements

Here you will find all the relevant requirements for the correct laying on the ground.

Installation on concrete/mineral compound subfloor

Dry, level, firm and clean sub floor. Unevenness (> 3mm/lm) level with filler or sand off.

 

As the duration of drying depends in climatic conditions the stated drying periods are to be considered as guidelines in any case for safety purposes two weeks should be added. Absolute certainty can only be guaranteed by adequate measuring e.g.

 

  • CM method (calcium carbide method). Base Drying Period Remaining Humidity CM-concrete c.f.1 week/cm 2.0%
  • anhydrate c.f. weeks/cm 3% 
  • pureed asphalt from 18supo/supC
  • magnesia c.f. humidity balance
  • mineral filler prod. instructions
Installation on concrete/mineral compound subfloor

Installation on wood subfloors

Dry, level, firm and clean sub floor. Unevenness (> 3mm/lm) level with filler or sand off. 
 
Wooden constructions must be sufficiently ventilated (4cmsup2/sup_ ventilation area per each msup2/sup_ of flooring). Principally bases consisting of wood (chipboard, hardboard and floorboard etc.) must not be covered with airtight materials as beneath the covering the microorganisms find ideal conditions to exist thereby ruining the floor. 
 
Due to this sufficient ventilation must be allowed. In sections of the installation near the wall wooden strip must be adjusted to allow for ventilation and passes through floor construction including the floor being installed. 


It must be presumed that the existing hollow/space underneath the construction will be constantly dry, to guarantee the balance of moisture of the wooden construction independent of the seasons, and thereby PE film as vapour absorption will not be needed.

Installation on wood subfloors

Evenness

The underground has to be even.  Small differences in floor level can be adjusted with an underlay Differences in floor level of more than 3mm must either be sanded down or filled in with filling compound.

Evenness

Existing Subfloors

Old fixed carpets, Needle felt carpets are unhygienic and too soft for installing laminate flooring over and have to be removed. An installation on PVC and linoleum- coating can only be done, if the floor is glued down and has no loose areas and if there is no underfloor heating.

Existing Subfloors

Cleanness

The subfloor has to be absolute clean before installing the laminate and therefore clean the floor with a powerful hoover.

Cleanness