DPC failed is it too high?

[davidm1969]

If the damp is not just on external walls but also internal/party wall and most near the chimney breast then that could be at least part of source of problem ... doesn't suffice to cap a chimney - if no ventilation you can apparently get condensation. If there was a chimney breast that's been removed or sealed off and no ventilation bricks you'll have a problem...Google 'ventilating an unused chimney'.

You say the other walls also have the problem.. on external walls often the problem is if the dpc has been bridged by render so damp goes over/round it. If there's damp on neighbours side of the party wall then your dpc (unless it went all the way to other side of the bricks) isn't ever going to stop the damp up that side and then over the top of your dpc. Def worth checking if neighbours also have a problem.

Damp proofing companies usually don't just inject dpc and replaster.. normally they use a dpm or damping slurry on the bricks to 'tank' the wall..otherwise the damp will just spread up the new plaster from below the dpc wont it? Did they just miss that out and hope you wouldn't notice because takes time for new plaster to deteriorate?

Last.. damp and condensation especially at ground level caused by tenants who don't open windows and dry clothes indoors, lack of air bricks when people insulate and furniture against walls so no air circulation.

Tend to agree with Woody tho... find source of problem is key, even if your dpc had lasted 10 more years you still have the problem..

 

[johnny2007]

No mention of all walls , party wall around chimney stack .

Please, try to read past the first 3 words.
This is from page 1:

the wall which is where most of the damp is it seems to stop in line with where the alcove would be. I have been inside the property for a couple of minutes and all walls are covered in damp to about 1m high.