Live in a 1959/1960 built bungalow with concrete subfloor throughout. Marley tiles were in place when we bought it and we had these taken up on advice from underfloor heating company. We only have underfloor heating in two rooms but decided for the price charged to remove the tiles it made more sense to do the whole house. So, three years on, having renovated and carpeted and laid nice engineered wood flooring we have been faced with a mildew problem at floor level in the bedrooms (all carpeted). Had someone in to do a thermal imaging report and was told we have a small amount of moisture coming up through the floor, probably due to removing the tiles and most of the bitumen they were stuck down with. Moisture readings were not high at all and pretty sure we have some sort of DPM in place between the top layer of screed and the concrete slab as sure we would have had a damp problem not just slight moisture. Have been advised to put a latex screed down. Can anyone recommend one that is good and also should the floor be primed first with anything. I have been looking at the paint on DPM, is this recommended or will the latex screed be enough to keep the moisture from coming up through the carpets? Don't have any mould problems where the wood floor has been laid. Most of these floors have had thermal sealers painted on. Any ideas or advice? Thanks