DIY Doctor UK DIY Forums

Posted: **Tue Nov 01, 2022 11:21 pm**

Could anyone tell me what they think this is/could be?

Upstairs is my neighbours sitting room.

Thank you in advance!

Posted: **Thu Nov 03, 2022 9:40 pm**

Hi lozziasjhdjd,
It's damp.
Regards S

Bubbles appeared in ceiling lining paper