- Joined
- 30 Oct 2021
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- 43
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1950s house, old skim was in a bad way so got builder to remove all the loose stuff. Some quite large patches were hacked off and we could see places that had been filled and sanded over by someone in the past.
Walls were then thistle bonded and plastered over. Was allowed to dry without heat on for a couple of weeks. I've just gone round the walls tapping to check them and there are quite a few small spots here and there where it sounds hollow These patches are not very large, on average about the size of a beer mat or smaller. I'd say there are about 20 or so such spots in one room, in random places.
The new skim feels as though it has swollen ever so slightly in these places but it also feels strong and does not move when pushed, nor is there any cracking except for in once place where we had some bricks replaced behind - just some hairlines over the mortar joints.
By the way, the plaster went on more than six weeks ago now. Heat has been on regularly during the last three weeks.
My guess is the old skim, once moistened when the new skim was applied, delaminated in a few places.
I know that one option is to hack the whole lot off, go back to brick and start from scratch but I would like to know if people feel this is really necessary. We spent a good bit on the skim and just don't have the budget for more right now, though I suppose it's something we could do some years from now if the new skim turns out to be unstable.
Walls were then thistle bonded and plastered over. Was allowed to dry without heat on for a couple of weeks. I've just gone round the walls tapping to check them and there are quite a few small spots here and there where it sounds hollow These patches are not very large, on average about the size of a beer mat or smaller. I'd say there are about 20 or so such spots in one room, in random places.
The new skim feels as though it has swollen ever so slightly in these places but it also feels strong and does not move when pushed, nor is there any cracking except for in once place where we had some bricks replaced behind - just some hairlines over the mortar joints.
By the way, the plaster went on more than six weeks ago now. Heat has been on regularly during the last three weeks.
My guess is the old skim, once moistened when the new skim was applied, delaminated in a few places.
I know that one option is to hack the whole lot off, go back to brick and start from scratch but I would like to know if people feel this is really necessary. We spent a good bit on the skim and just don't have the budget for more right now, though I suppose it's something we could do some years from now if the new skim turns out to be unstable.