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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Plaster disaster. Help Please!
Hello all
Has anyone seen plaster do this??? Our internal walls show some cracking 2 years after replastering. The worst has three long cracks up to five foot long, which gives and bends in on pressing. Here's the good bit. I removed a small piece of plaster at the centre of the cracking, and could poke my finger in about 2 inches to the plasterboard underneath. A 6 foot square area of plaster has come right away from the plasterboard underneath!!! No wonder it's cracking, it's supporting its own weight and only gripping the wall at the edge of the area. Presumably it's still coming away and will fall off. Can it be PVA'd back? Some other adhesive? Was there some cheap crap substitute used in the plaster? Should we just have it redone (by someone without a wide hat and stirrups)? Any advice from you experts appreciated! Adam |
#2
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Can it be PVA'd back? Some other adhesive? Was there some cheap crap
substitute used in the plaster? Should we just have it redone (by someone without a wide hat and stirrups)? Pull it all down and redo it. Christian. |
#3
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A wrote:
Hello all Has anyone seen plaster do this??? Our internal walls show some cracking 2 years after replastering. The worst has three long cracks up to five foot long, which gives and bends in on pressing. You *could* carefully drill holes throught it in several places and pump slightly watered-down PVA through them, then fix a large board over the whole lot until it goes off, then fill the holes. I've seen this done on a ceiling and it was successful (unlikely, I know, but it worked), but it would probably be easier to get the whole lot re-plastered - you could then have a look to see if there's any reason it came loose in the first place. Si. |
#4
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A wrote in message om... Hello all Has anyone seen plaster do this??? Our internal walls show some cracking 2 years after replastering. The worst has three long cracks up to five foot long, which gives and bends in on pressing. Here's the good bit. I removed a small piece of plaster at the centre of the cracking, and could poke my finger in about 2 inches to the plasterboard underneath. A 6 foot square area of plaster has come right away from the plasterboard underneath!!! No wonder it's cracking, it's supporting its own weight and only gripping the wall at the edge of the area. Presumably it's still coming away and will fall off. Can it be PVA'd back? Some other adhesive? Was there some cheap crap substitute used in the plaster? Should we just have it redone (by someone without a wide hat and stirrups)? Any advice from you experts appreciated! Adam It begs a couple of questions. Why have you got plaster on top of plasterboard and why is there two inches of it? Unless the walls are desperately out of true plaster should only be about 3/4" thick. If the walls are plasterboarded anyway that should be the top surface with no need for plaster on top of that. It sounds like a bodge to cover up something nasty underneath. As for sticking it back it can sometimes be done with PVA injected into holes but 2 inches thickness is a hell of a weight and I can't see it working. Probably easiest to strip it all off, find out what is wrong with the walls underneath, fix that and then decide whether to plasterboard or re-plaster direct onto the walls. |
#5
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"Dave Baker" wrote in message ... It begs a couple of questions. Why have you got plaster on top of plasterboard and why is there two inches of it? I think he means it is coming away from the plasterboard and there is a 2" gap between the board and the underside of the plaster skim! HTH John |
#6
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"John" wrote in message ... "Dave Baker" wrote in message ... It begs a couple of questions. Why have you got plaster on top of plasterboard and why is there two inches of it? I think he means it is coming away from the plasterboard and there is a 2" gap between the board and the underside of the plaster skim! That's how I read it too. Mary HTH John |
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Dave Baker (NoEmails) wrote:
It begs a couple of questions. Why have you got plaster on top of plasterboard and why is there two inches of it? snipped follow ons from this Just to confirm Dave, there is a 2" gap between the wall and the plaster. The plaster skim itself is less than 1/2" thick. The plaster has bowed out from the wall into a shape like a big dish or plate placed against the wall. The plaster is only in contact with the wall at the edge of the plate. It is cracking no doubt because it is supporting its own weight and only gripping the wall at the plate edge. Again, why should that happen? Why did the plaster lose its grip on the wall? If the problem was with the plaster mix just having it redone should do the trick...??... Thanks to all for earlier replies and any more, Adam |
#8
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wrote in message
oups.com... Dave Baker (NoEmails) wrote: It begs a couple of questions. Why have you got plaster on top of plasterboard and why is there two inches of it? snipped follow ons from this Just to confirm Dave, there is a 2" gap between the wall and the plaster. The plaster skim itself is less than 1/2" thick. The plaster has bowed out from the wall into a shape like a big dish or plate placed against the wall. The plaster is only in contact with the wall at the edge of the plate. It is cracking no doubt because it is supporting its own weight and only gripping the wall at the plate edge. Again, why should that happen? Why did the plaster lose its grip on the wall? If the problem was with the plaster mix just having it redone should do the trick...??... Seen this before with a "bodge" of plaster over old wallpaper and the wallpaper coming away from the wall. Solution was more bodge with PVA and plaster mix in holes, forced behind the lifted plaster and wooden boards propped against the wall hoping the PVA would stick and finally a year or two later pulling the whole lot off, steaming off the wall paper and skimming over properly. |
#9
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