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Hi All
I posted about this issue at the start of the year (here), but was unable to sort the issue as family circumstances forced me to make the room usable again. Anyway, now is the time to sort it out...
There is damp in the alcove to the side of the fireplace (on the party wall) and on the external wall on my 1890 mid terrace house.
There has previously been damp proofing work around the whole of the back on the house, in 1994 - this location is the only area that is now affected. This work consisted of:
The damp on the external wall started off reappearing over my hastily painted wall from below/around the socket and expanded outwards (I scrapped off a bit of plaster where it is damaged). The photo below shows this:
Based on the advice I received back in January I was going to knock off the plaster and then re-render the wall. Does this still stand?
I was wondering if I should also tank again the bottom 150 mm?
Other potentially important points:
Thanks in advance for any advice, I really appreciated all the advice last time.
Doug
I posted about this issue at the start of the year (here), but was unable to sort the issue as family circumstances forced me to make the room usable again. Anyway, now is the time to sort it out...
There is damp in the alcove to the side of the fireplace (on the party wall) and on the external wall on my 1890 mid terrace house.
There has previously been damp proofing work around the whole of the back on the house, in 1994 - this location is the only area that is now affected. This work consisted of:
- An 'injection mortar' being injected into the masonry from the inside. As in this corner the outside floor level is approximately the same as the internal and also the neighbours floor level is a course of bricks higher this was done at 150 mm above floor level.
- The walls below the new dpc were painted with a tanking solution.
- The walls were then re-plastered with a 'damp proofing specification plaster'.
The damp on the external wall started off reappearing over my hastily painted wall from below/around the socket and expanded outwards (I scrapped off a bit of plaster where it is damaged). The photo below shows this:
Based on the advice I received back in January I was going to knock off the plaster and then re-render the wall. Does this still stand?
I was wondering if I should also tank again the bottom 150 mm?
Other potentially important points:
- Solid floor with a DPM, although this has been bridged at some points, it looks as if it didn't stick up enough and therefore the concrete met the walls.
- Chimney is in use as a flue for a gas fire.
- The work was done by what appears to be a reputable company (specialist, still going today). It is under guarantee but they want money to change the name and then to come and inspect, and I suspect it may be cheaper just to sort it myself.
- The outside wall appears to be damp at a higher level, maybe coming from the garden wall (photo below and plan of how the garden wall meets my and my neighbours houses). I'm not sure if this could be related or a red herring, or how this could possible be solved?
Thanks in advance for any advice, I really appreciated all the advice last time.
Doug