I have the local Tonzon installer coming on Monday to price up insulating and putting in a moisture barrier, my back door neighbour was very positive about the benefits. When I looked and googled the issues one thing did come up and it’s the evaporative heat loss. So I put the radio connected weather station sensor “downstairs” and got the below readings after an hour or so, it’s hot and wet! I think previous owners who put in underfloor heating system should, without criticism, have considered this as part of the job. In any event I will see what sort of price Tonzon come with; I think it saves a lot of gas. The top values in living room, below that crawl space
