During a Full Building Survey we inspected a property in Horley, Surrey which has been newly altered and extended . There is a modern breathable membrane beneath the tiles. Unfortunately, where condensation is occurring, breathable membranes are meant to prevent condensation. It is not uncommon to find that not all breathable membranes work effectively and if issues like this occur, then proprietary tiles vents need to be installed to ensure a through flow of air through the roof void to prevent moisture laden air creating condensation issues.
