painting a single skin wall


Postby 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.
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Postby 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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Postby dartmoorlizzie » Tue Jan 20, 2009 6:16 pm

So demolish porch and rebuild with cavity? Hang the expense?
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Postby 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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Postby TheDoctor5 » Mon Jan 26, 2009 9:15 am

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