Hi any help please I’ve recently had new concrete floor put down approximately a month damp meter readings 1.6 had dehumidifier on for 2 days still same levels, would a liquid dpm be ok at this level of reading to screed on... thank you in advance
A month old then it should be good to Dpm. A few to pick from. We like using Uzin PE404, 2 coats. the meter you have won’t give you a correct reading. You need to get a hydro box really and check for RH%