DIY Doctor

Water/Damp on external walls

Postby NIKMANS » Wed Nov 17, 2010 8:41 pm

I have a re-occuring problem each winter once the wet weather starts with wet and damp patches in the bedroom and also living room.
Since last winter i have removed the wallpaper and painted with damp proof pain once it had dried out. I have also purchased a de-humidifier and ensure a small window is open in all rooms at all times.
I woke this morning to find a damp patch in the top corner of the room and what i would describe as tears of water across the top of the outer wall beneath the coving.
Could this be a problem other than condensation?
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Simply Build It

Postby welsh brickie » Thu Nov 18, 2010 12:10 pm

No sounds like its penitrating through from either the roof or render outside
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Postby eddylyons » Thu Nov 18, 2010 9:43 pm

check the roof for leaks and also check the pointing on the outside, it might need re pointing. i had to use a damp proof membrane to stop damp in my house. its old and needed insulating anyway. so i used dpm on wall then 2x1 batterns with celotex inbetween and then plasterboarded over the top. then had it plastered and then painted...its been fine since but costs a few quid.
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