A tightly sealed property or flat, where many water vapour is developed that can't escape through very good ventilation, will inevitably result in the inside air becoming saturated to The purpose that the excess water vapour starts to condense onto colder non-porous surfaces - glass, mirrors, window frames, gloss paintwork, https://fine-art-photography20365.newbigblog.com/32677135/examine-this-report-on-noise-reduction-windows-in-chelsea