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Dot & Dab patches... (Read 5239 times)
HBoss
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Dot & Dab patches...
Aug 22nd, 2013, 6:05pm
 
Can you paint over dot & dab patches?
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woodsmith
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Re: Dot & Dab patches...
Reply #1 - Aug 22nd, 2013, 6:58pm
 
By dot and dab patches do you mean dark marks on the wall following the positions of the dot and dabs? If so they are usually caused by damp on the outside wall spreading through the dot and dabs into the plasterboard. You would need to fix this before you could paint to be sure the marks didn't reappear.
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HBoss
Re: Dot & Dab patches...
Reply #2 - Aug 22nd, 2013, 7:20pm
 
Yes that's what I meant. Thank you for your reply. Apparently the house  has had a damp proof course before we moved in about 5 years ago. More matches seem to be appearing too. It looks awful!
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woodsmith
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Re: Dot & Dab patches...
Reply #3 - Aug 22nd, 2013, 10:51pm
 
I have seen some jobs where they have tried to fix this by cutting out the offending patches but it is a poor job at best.

The first, and easiest, things to look for are,

guttering, is it in good condition and not blocked in any way? Go out when it's raining hard and see if any water is coming out where it shouldn't.

Pointing, is the pointing in good condition.

Look for any reason why the ground at the base of the walls may be particularly wet.
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« Last Edit: Aug 22nd, 2013, 10:52pm by woodsmith »  
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mountainman
Re: Dot & Dab patches...
Reply #4 - Sep 25th, 2013, 4:28pm
 
woodsmith wrote on Aug 22nd, 2013, 10:51pm:
I have seen some jobs where they have tried to fix this by cutting out the offending patches but it is a poor job at best.


I've seen some truly terrible cover-ups on damp in my time..
Particularly when I was looking to rent in Brighton for a short while in my life- it seemed like every place I went was damp, and they just tried to paint over it!

I'm pretty sure that anyone familiar with living in damp conditions can just smell/taste it in the air..  Lips Sealed
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