Damp in the bedroom

PierremontQuaker03

Hi All,
thanks for looking, have got damp through an external wall coming through - I think the damp issue has been fixed but after painting the wall, as you can see from the patches some of the damp has came through the fresh new paint.  I have since painted it again and the same has happened. How best can I sort this problem - shall I give it a fresh undercoat then try the finish again or is there any treatment I can do? Thanks in advance.

FreeBear

You should really be letting the wall dry out thoroughly before painting. Judging by the width of the windowsill, I suspect you have solid brick/stone walls. Rule of thumb is to allow one month for each inch of wall thickness to dry, so you'd be looking at 9-12 months.

Slapping modern acrylic & vinyl paints on a damp wall is only going to trap the moisture. So either wait a year, or use a breathable paint (clay or limewash).

PierremontQuaker03

FreeBear said:

You should really be letting the wall dry out thoroughly before painting. Judging by the width of the windowsill, I suspect you have solid brick/stone walls. Rule of thumb is to allow one month for each inch of wall thickness to dry, so you'd be looking at 9-12 months.

Slapping modern acrylic & vinyl paints on a damp wall is only going to trap the moisture. So either wait a year, or use a breathable paint (clay or limewash).

thank you much for the advice, didn't realise it would take that long so i'll leave it alone for a year