Condensation This is a common problem on our latest damp proofing survey, high humidity created from the on-suite bathroom with dodgy extractor. Inadequate heating is causing the wall fabric in the adjoining bedroom to cool hence condensation is formed due to water vapour cooling on the wall surfaces. To find out more on condensation in your home contact Preservit Ltd and we can give you good advice on how to prevent moisture build-up with a few simple steps. Company Registration Number 10559369