Hello, I bet this has been asked some times, but I was not able to find a good response. Sorry for the repetition. We bought this terrace house in London, with the idea of renovate all of it. It is a very extended property with a double rear extension and side extension.   The floors are as follows (see diagram below): Front reception/living: suspended wood floor. Several issues: Serious damp issues with very rotten wood (30-50% needs replacing)