Installation on heated and unheated calcium sulphate screed (CA) with increased residual moisture

Calciumsulfatestrich ca 2

CA flow screeds must be abraded, vacuumed and, as with all calcium sulphate substrates, primed with ASO-Unigrund. The moisture content of a calcium sulphate screed must be determined with a carbide hygrometer before installing finishes. If ceramic tiles are to be laid on calcium sulphate screeds with higher levels of moisture than those given in current regulatory works, a max of 1.5% for unheated screeds and 1.0% for heated screeds can be accepted. In this case the floor finish to be installed must have a minimum of 2% joint content (tile 40/40, joint width 4 mm), which may be less with vapour permeable tiles.
NOTE: Exclude moisture rising from the substrate. This type of installation does not conform to recognised technical regulations and is to be contractually declared separately.

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Grundieren PRIMING

Solvent free universal primer, water and alkali resistant

Ausgleichen LEVELLING

Levelling compound for floors, 2 – 30 mm, in interior areas


Thermally insulating impact sound deadening and de-coupling board, 4/9/15 mm


Flexible thin-bed adhesive for CA screeds, prevents ettringite formation


Rapid hardening flexible grout, 3 – 20 mm joint width

Mineral-based multi-function flexible grout for tiles, natural stone and other finishes from 1-10 mm joint widths with FAST TECHNOLOGY

Silicone sealant for movement joints

Silicone sealant for use with natural stone