Concrete or screed floors need enough time to dry properly before it is possible to place a Floorify rigid vinyl floor on it.
Rule of thumb: Wait one week per cm of screed, this applies to screed floors up to 4cm. Wait twice as long for every additional cm up to 6cm and wait 4 additional weeks for every cm above 6cm.
Example: For a concrete floor of 6cm you have to wait at least (4 x 1 week) + (2 x 2 weeks) = 8 weeks before the floor is completely dry.
Tip: Make sure that the room is sufficiently ventilated.