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getting rid of damp marks

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CEC | 15:29 Wed 15th Nov 2006 | DIY
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My son has just moved into an older terraced house. There are some damp marks on one of the walls from condensation. I have heard that you need a sealant on top of these marks as the marks will show through any paint that you apply. Is this correct. The house has had a new damp proof course, and the plaster on the walls seems to be sound.
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Avatar Image carrust
Paint over the affected areas with oil-based undercoat or stainblock (undercoat's cheaper), leave it overnight to dry. Then emulsion as normal.
22:03 Wed 15th Nov 2006
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Thank you for that, I will pass this on to my son.
10:05 Thu 16th Nov 2006

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