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Hope someone can help. I moved into a property A couple of years ago with an extension that was built in 2013 so not old.

In the corner of the wall there was a bulge and when I dug down I realised it was like a grey plaster that was cracked.

So I patched it up with plastering tape and a ready mixed filler. Now a year later I’m decorating and I found it’s buckling out and cracked on the surface in about the same area and when I opened up the crack it took off a layer of plaster exposing wood underneath which I assume is the plaster it’s frame?

I’m not sure what caused the bulge in the first place but should I be concerned and what would be the best way to repair it?

See pictures attached. Many thanks for any help. (Apologies I couldn’t rotate the last picture So it’s on it’s side.)

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Plaster doesn't stick well to wood in the long run. On an old time plaster wall, the base coat was spread over lath boards so that it oozed out the other side and locked in the wall as a whole. When that starts cracking, problems result. This is too new of a house for that, so it's probably just some not-so-well thought out wall finishing.

The go-to product for sticking plaster to other things, including old layers of itself, is "Plaster Weld" It's a pink thick latex that will bond to the substrate and let the new plaster stick to it.

I have an old quart, I've been nursing for years. Seems it's not that easy to find these days. Plaster Weld quart

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  • Great thank you for this. I was starting to worry that the wall had been compromised in some way. So do I literally just paste this stuff on and the when it’s dry use layer of plaster? – Kirstie May 31 '20 at 11:22
  • Yes, that's how it works. You may have problems finding it, ask around. – DaveM Jun 1 '20 at 3:40
  • Thanks for your help. I’ll try and find some. All the best – Kirstie Jun 1 '20 at 14:17

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