Damp but from where?

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In my ground floor kitchen I have two windows about 18" x 18" and a piece of wall of a similar size seperating them. I went away for 4 weeks, the house was empty, so no bath/shower etc was being used. On my return I found two brown streaks of damp (still wet to the touch) down the outside edges of the piece of wall between the window. Above the kitchen is the bathroom, yet the areas under the bath, shower and sink were bone dry. Outside the kitchen and behind the damp patch is guttering and although the hopper box into which the water-pipes from the bath, sink and shower all feed their effluent into has a very very small leak at the joint - is it enough to penetrate through the brickwork of the house, even over time as so quickly too? It rained VERY havily whilst away but surely this could not get through the same walls? My house was built in 1884 so has rather thick (double-lined?) walls so surely rain water could not get through the walls? There are no apparent problems with the brickwork, which has been painted over anyway, and the grouting in between the bricks is secure too....any ideas? Can water travel far? And my house is detached so it's not from next door![/url]
 
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phil1963 said:
...down the outside edges of the piece of wall between the window.
Er, I don't quite understand your description. Is the water inside the house, or outside?

Can water travel far?
Yes; a surprisingly long way.
 
phil1963 said:
.... behind the damp patch is guttering and although the hopper box into which the water-pipes from the bath, sink and shower all feed their effluent into has a very very small leak at the joint ..... It rained VERY heavily whilst away....

Seems pretty straightforward to me.

Heavy rain... leaking guttering and hopper... water spillage running down wall.

Get them fixed. Rainwater will soak a wall very easily. Try putting a dry brick in a bucket of water and you will see it soaks up water like a sponge (but slightly slower).
 
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Does this mean that a sponge immersed in a bucket of water will soak up water like a brick (but more quickly)? ;)
 

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