Damp course and blown plaster

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27 Jan 2023
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I have been quoted a small fortune to damp course all the walls in my dining and living rooms, to tackle rising damp. This would include hacking off the plaster up to one metre, inserting tanking and re-plastering.

But now I’m wondering now about the area above that.

I live in a semi which at a guess is around 1930s and I assume its the original plaster. When I tap the walls downstairs, some areas sound solid, some a bit hollow and some rattle. I assume the latter means that the plaster has ‘blown’?

The wall just above the fireplace seems solid. But when I drilled holes for a TV mount, the plaster was very dry, making it difficult.

What would be the best solution for these two rooms? Should I continue with the damp course and get the area above one meter skimmed (maybe up to the picture rail or coving)? Or would an experienced plasterer be able to identify the ‘hot spots’ and deal with them individually? I know nothing about this subject.

A friend of mine said he got all the plaster in his downstairs, up the ceiling, removed and had it replaced with plasterboard. He spent about half the price of my damp course quote. However, I’m not a fan of plasterboard and would prefer proper plaster. I’m assuming my quote is for proper plaster. At least my friend took care of the whole wall area – maybe I should do the same?
 
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