Damp problem ??

[kevin_robson]

Anyone got any ideas what could be causing this?
Thanks

 

[Nige F]

yes blocked cavity.....ie."snot on a walltie"...........that`s snot a solid wall. take your pick ..believe or doubt

 

[Nige F]

Survey I could survey it better sitting here

 

[Static]

As NigeF rightly says it has the look of cavity bridging. I wouldnt think its a solid wall as suggested as there is block internally and brick externally. I would suggest clearing out the rubble by the wall externally, next time it rains heavy go outside and check if the guttering is working properly (you may have water running down that wall from the guttering corner above). Then if all else fails remove a brick outside the damp patch and see what is hidden behind.

 

[kevin_robson]

Thanks. I'm assuming you mean breeze block above the black brick that is shown here, as obviously this is presumably a brick?

http://kjpublic.dynalias.com/damp25.jpg

If I do start taking bricks out what am I looking for? I've tryed googling for the terms you both mention but not a lot is coming back.

Finally, if there is a cavity and it is blocked, where exactly does the damp come from?

Sorry to go on, just I am hearing so many different things from different people and I want to make sure I get the problem sorted.

 

[Static]

Difficult to get a sense of scale from the photos.
Easiest way to tell if you have a cavity wall is go find an external door, perferably on the same wall and measure the distance from the internal side to the external face. If it is about 230mm then it may well be solid, if its 250mm-350mm then its most likely cavity.

 

[kevin_robson]

I have measured the outside wall to my patio window - 902mm.
I have them measured inside wall from patio window to plastered wall - 687mm.

Width of bricks is therefore 902-687=215mm ish. It is actually less by the time I take into account approx 10mm of plaster.

I'm therefore assuming it is a solid wall by what you said earlier.

With this in mind, any ideas what the problem could be?

Thanks

 

[Static]

Hmm, check the black brick course outside the damp area for signs of cracking along the mortar joints.