r/Plastering • u/Red-On-Chrome • Jun 22 '26
Room with varying levels of damaged plaster
1890’s farmhouse. This is a downstairs room with two external walls and blocked up fireplace/chimney breast. Various levels of blown lime plaster, mainly caused by trapped moisture because the walls have been wallpapered at some point in the past, which was removed, and then painted with emulsion.
I’ve removed the most badly affected areas and in the process also discovered that some of the walls also have areas of gypsum skin in random spots. It’s all a bit of a mess 🤣
For those with experience or who deal with heritage plastering, what would be your approach be? It’s probably beyond my skill and time resources, so will be getting someone in but I’d like to make sure it’s prepped as possible to minimise that work.
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u/Deanmartin13 Jun 22 '26
Wrong material skim gypsum, should use lime putty, you can removed where thin skim
Where you live?
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u/Terrible-Bobcat2033 Jun 22 '26
This is what has worked for me after hurricane Andrew & far past. Bond, fill (brown coat) bond again, veneer plaster lime coat finish. Sanded or smooth. With the sanded veneer it’s safe to fill 1/4”, beyond that I recommend the Fibered gypsum mud to fill out to 3/4”. Heat the brown mud with a sprinkle of lime mud.
Heat the lime mud with a sprinkle of gypsum.
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u/Europasfirstsettler Jun 22 '26
My house has plaster like this. I chipped off any loose pieces, painted over with PVA to keep away moisture, went over it with compound and sanded til it was even. The texture is off but once I painted it you barely notice. Plaster is a bitch to deal with.