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Damp Proofing
damp dots showing through plasterboard studs
Anonymous user 17 December 2014 - 7.19 PM
I live in a conversion done in the early 70s. On many of the walls inside there are damp dots spaced fairly evenly in vertical lines where the studs are. Presumably the dots are where the screws fix the plasterboard to the studs. Is this simply condensation, or does it indicate inferior construction? Thanks to all who have replied. I am thinking of cutting out a piece of plasterboard to get more information about the construction inside the wall before working out what to do.
6 answers from MyBuilder tradespeople
Hi there Does sound like condensation, the screw heads being metal and colder so helping the the moisture to form on them and then go mouldy,seen it on breeze blocks before lines of faint black mould forming because of the mortar joint being colder than the thermal blocks so producing the right temperature for mould to grow feeding of the moisture formed. your walls need to be insulated try for a council grant Regards joseph
Answered
18 December 2014
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Anonymous user
I would need to examine the property before making any decision.
Answered
19 December 2014
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Anonymous user
hi from what yu have told us this sounds like when they have constructed this they have gone threw the membrain which should be used with the screws causing a hole where moisture will get in.
Answered
20 December 2014
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are the walls internal or external if they are external you may have a penetrating damp problem. the plasterboard system may be dot/dab and not a stud system, if dot/dab damp may be coming through walls via the dot onto plaster boards therefore causing the problem if its what l said it is a inferior system
Answered
21 December 2014
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could be due to not enough plaster on boards , not enough paint or even showing due to lack of insulation between joists
Answered
21 December 2014
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Anonymous user
sounds like you have condensation building up within the void or cavity, sometimes a simple vent can resolve the issues. check for leaks or water ingress.
Answered
18 December 2014
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