A tightly sealed home or flat, where a great deal of h2o vapour is made that can't escape via great air flow, will inevitably lead to The within air starting to be saturated to the point that the surplus h2o vapour starts to condense on to colder non-porous surfaces - https://paxtonudirv.thenerdsblog.com/32329629/a-secret-weapon-for-bespoke-secondary-glazing-in-chelsea