3. How is the levelling compound applied?
The first step is the adequate preparation of the substrate. You can find the step-by-step instructions here. Old adhesive residues and loose components must be removed in order to provide a reliable bonding with the levelling compound. As soon as the floor is dry and cleaned, insulation foam strips are installed around all wall/floor connections. In this way, the new floor covering is separated from the walls.
The next step is to prime the substrate for better adhesion with the next product. This reduces the porosity of the subfloor. Depending on the type of subfloor, a different primer is required (for absorbent substrates, for example, weber.prim 801, for non-absorbent, smooth substrates weber.prim 803).
As soon as the primer is completely dry, the levelling compound can be mixed. To do this, mix the material in powder form thoroughly with the amount of water specified on the packaging, either by machine or by hand, using a mortar mixer. The prescribed amount of water must be adhered to precisely.
Then just pour out the mixed material and everything will literally run by itself: the product spreads uniformly and creates a perfectly even underlayment surface. If necessary, the liquid compound is distributed to the desired thickness and smoothed with a notched blade scraper. Depending on the thickness of the layer, the floor can be walked on after one to two hours and covered after 24 hours. With weber.plan 813-20, differences in height of 1 to 20 mm can be levelled - and even in just one work step. The material also has low emission of volatile substances. It has been awarded the EMICODE EC 1 PLUS seal. This quality seal provides applicators and residents with the certainty that almost no volatile organic substance escape from the material into the room air.