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Ian Mayes

Hi Phil,

questions and comments , how is the subfloor space ventilated. It will need some. If there is rigid poly insulation well installed, this should stop a lot of the draughts. I would absolutly NOT put a vapour barrier there for the same concerns.CONDENSATION. With good insulation, the right amount of air movement( not a howling gale or no air movement)and carpet and underlay , they should be pretty good.
There is the possibility of putting down hardboard, which would be pretty airtight but moisture permiable. But as i say above , shouldn’t really be neccesary. Hope these non-sequential ravings help.