“By using the illustrated Sorption Isotherm graph which has been calibrated to show how moisture content within the screed is equivalent to relative humidity (RH) as a percentage. As a general rule, non-moisture sensitive floor coverings such as tiling can be laid when the screed has a relative humidity of between 80-85%. Moisture sensitive floor coverings such as vinyl require the relative humidity to be at 75% before installation.
It can be seen from the graph that for a cement based screed the moisture content (CM) needs to be at 3% to achieved a relative humidity of 80%. Longfloor IntegraCure Rap7D achieves this value in as little as five days after installation.
To achieve a relative humidity of 75% and the floor to be dry enough to receive all types of floor finish the CM reading needs to be at 2.5%. Longfloor IntegraCure rap7D achieves this in as little as seven days after installation.
There is no other flowing product available in the market with this drying time performance. Equivalent cementitious systems take 21 days to dry and the fast drying anhydrite screeds quote a minimum of 14 days. Anhydrite screeds need to be at 75% RH for any floor finish to be applied.”