Dark patches on external bedroom wall jusy appeared
Posted: Sun Nov 22, 2020 11:53 am
Hi everyone, I could use some advise! We've noticed a dark patch appear on our bedroom wall as we've entered the winter months. It doesn't feel obviously damp, but it is much colder than other areas of the external wall. Although it's an old building (c. 100 years) I can't see any obvious cracks in the external wall.
Appreciate any thoughts or advise on how to repair this! Thanks!
Appreciate any thoughts or advise on how to repair this! Thanks!