Can anyone help please? I've received differing advice on laying a new LVP floor. I would appreciate advice: We had a 75mm sand and cement screed laid on 25 May. On 11 July the moisture readings from a hygrometer are about 76%. We are agreeing to fit the floor toward the end of July when the screed will have been down for c.60 days. The weather’s been very warm and it’s south facing - can we assume it’s dry enough to lay the floor on (with appropriate levelling compounds) if all the readings on a handheld hygrometer are under 75%?
It would be a good indication you can go ahead but should use hygrometer boxes to take readings to be safe. Failing that use a liquid dpm and your good to go
Be careful as the sun might not cover the whole room. The boxes should be laid in areas where the sun isn’t reaching. A average 4-6” screed will take around 4-6 months to dry out in normal conditions
If it’s a new screed and only releasing construction moisture you may as well use a dpm primer like Ardex mvs95. Then no moisture issues and the levelling compound flows better
