FAQs
Common questions about liquid screed installation and drying times
What is the minimum depth on insulation screed can go?
With Liquid screed the minimum depth is 40mm
What is the minimum depth with underfloor heating screed can be?
You can install the screed 25mm above the top of the pipes with Flowcem Classic or Flowcem Therm
How long does screed take to dry?
You can walk on the screed in 24-48 hours. For the screed to receive floor coverings it drys in 21 days at a depth of 50mm or 28 days at a depth of 75mm.
You can force dry after 7 days with a dehumidifier or underfloor heating. Read our drying guide here
Do I need to fill my underfloor heating pipes up?
Do I need to sand the screed?
While Cemfloor is a laitance-free screed, your flooring contractor may choose to lightly sand the surface to key it up prior to installing floor coverings. This also helps remove any minor plaster residue or construction debris, ensuring a clean and optimal bonding surface.
Do I need to prime the floor before tiling?
Do I need expansion joints in the screed?
This is dependant on the size of each project.
Can I screed on Joists?
Do I need a slip membrane or Vapour barrier on top of the insulation
Yes, this is required for all liquid screed installations as it helps prevent the screed from lifting the insulation and forming cold bridges.