Options with dry screed elements


Dry screed can be the preferred solution on a number of occasions - be it because in already damp buildings should not get even more moisture, or because the fastest possible expansion is important. In terms of price, dry screed elements are usually slightly more expensive, but this can often be compensated for by the possibility of self-laying without helpers and by the overall faster installation. For dry screed elements, there are different systems on the market, the manufacturer Norit also offers a complete system dry screed / underfloor heating, which makes the otherwise problematic structure of dry screeds in existing underfloor heating relatively comfortable and also the performance disadvantages, the dry screed here for the most part fixes.

Tongue and groove, glue and screws

The connection of the individual dry screed plates happens at the individual manufacturers in unequaled way - most use connection systems, which are based on the tongue and groove principle, at individual manufacturers are also real click systems as in the case of laminate. As a rule, the individual elements of the dry screed must be glued together, almost all of them should be additionally secured by screwing afterwards. As soon as the adhesive has hardened - generally after about 24 hours - the dry floor is already ready for use.

Plasterboard, gypsum fiber and other materials with and without lamination

The type of construction and the materials used may differ significantly in the individual dry screed elements - plasterboard and gypsum fiber are the one fraction, cement-bonded wood and wood fiber boards the other. In the latter very high bending tensile strengths can be achieved, which are quite similar to those of liquid screeds. Applied lamination, impact sound insulation and thermal insulation then further expand the product ranges of the individual manufacturers. Thus, specially designed insulation below the dry-line elements becomes superfluous. Basically, the right material is available for just about any special application. Under the dry screed elements is almost always a leveling in most constructions. According to DIN regulations, this leveling pad must be made of a material that will form a solid surface after which a trickle guard must be applied if the bottom plate is permeable.


Video Board: Underfloor heating comparison - part I: warm-up (turn on step response) - dynamic thermal simulation