On Sunday, 24 November 2019 08:13:21 UTC, Mike Halmarack wrote:
On Sat, 23 Nov 2019 14:39:28 +0000, Andrew
wrote:

At the end of the day it boils down to lack of insulation and/or
not enough heat and/or ventilation.

In a 70s build I wouldn't usually expect those to be the problems, though can sometimes be. Excess water vapour dumping is more likely the prime problem. If the place has been overenthusiastically sealed up later then ventilation can be an issue.


NT