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damp on walls

Postby kentman » Wed Jun 03, 2009 12:50 pm

i have a porch with damp on its got render on the outside then breeze block and artex skimmed on the breeze block.

i get damp patches all over there is no air brick in the porch.
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Simply Build It

Postby bd3cc » Wed Jun 03, 2009 9:19 pm

Whatsort of damp symptoms?
Render is not necessarily waterproof unless a treatment applied(exterior paint/waterproofer), breezeblock will absorb water, as will Artex.
If it is only single skin, could be penetrating or condensation, if cavity, likely to be condensation/ ventilation, but need to know the signs of damp.
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