Don't know cause of damp 20years ago but there had been a lot of extension and building work.
We had chemical injections into the wall where the skirting boards had been taken off above the solid floors. This did the trick up until now. The affected walls are internal and the damp is...
2 walls are beginning to show a line which we assume is damp exactly where we had the damp problem 20 years ago.
We had the concrete floor drilled out to replace old central heating piping. This involved going through some walls at ground level
We have recently had some underfloor pipework done which appears to have broken our damp proof seal (done about 20 years ago)in some places. As this has happened in the last few weeks will it be necessary to get the walls replastered after the damp is fixed? How long does it take for salts to...