painting a single skin wall

by **dartmoorlizzie** » Mon Jan 19, 2009 12:27 pm

Our porch has only single walls- no cavity - and consequently any paint quickly becomes discoloured and speckled with black mould. Are there any sealants I could try to stop this happening? Grateful for all ideas.

by **stoneyboy** » Mon Jan 19, 2009 10:55 pm

dartmoorlizzie,
Nothing will stay stuck to the inside of the walls if water is penetrating from the outside, also condensation will form because the walls are single skin - hence the mould.
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by **dartmoorlizzie** » Tue Jan 20, 2009 6:16 pm

So demolish porch and rebuild with cavity? Hang the expense?

by **stoneyboy** » Wed Jan 21, 2009 6:11 pm

dartmoorlizzie,
Since its a porch you could build inner walls of aerated concrete blocks leaving a cavity between the inner and outer walls but your porch will then be about 30cm smaller.
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