Damp on wall

max84

Hi Everyone

I am after some advice on damp walls, i have a semidetached house and the chimneys were taken out by the previous owner, both ground and first floor. on the ground floor when i bought the house it had damp and I got a local damp expert to come in and apply the damp course to the wall. i waited a month before painting the wall but after a few months the paint has been peeling off and some black mould has grown. I got the same person to come back and he advised this is not damp, its salt and other stuff coming out the wall ( the wall is linked to my neighbours property). he advised i sand the wall and paint again, I don’t think this will get rid of the problem, i have attached some pictures of the wall. can anyone advise on the best solution to this problem?

max84

how can i post pics?

SG27

Host them elsewhere and post the link with spaces put in.

Have you checked the roof? Is the chinmey stack still there? Sounds to be like water getting in from the top and building up at the base of the internal wall below.

Injecting damp proof courses dont work and are a waste of money.

TheCyclingProgrammer

Are you sure it isn't condensation? The DPC salesman you invited round won't tell you that because he won't be able to flog you a new DPC.

garrysibbald

It does take months for walls to dry out if the brickwork has become saturated from damp so it may just be a matter of waiting longer.
However, we often find that recurring internal damp is due to cavity wall insulation which has become saturated from leaks and remains wet inside the cavity. If this isn't removed the internal wall won't dry out and the problem will not go away.
Ask the guys who fitted the damp proof course whether the cavities were checked for wet cavity wall insulation and/or any other debris that could cause a breach of the cavity.