plastering over painted walls Ask your questions and find answers on many subjects relating to plastering and dry lining

[barnard]

What mix of pva to water should I use before skimming a wall.I have been using 50/50 but when I skimmed over a wall with gloss paint on (from years ago) I found the plaster wouldn't fix to the wall and peeled off in a few small places.
Could this be the pva mix or would you recommend sanding the painted wall first before pva.
I have seen sanding tools in specialist plasterers suppliers shops is this what they are for?
Please help!

[thedoctor]

Don,t plaster over gloss at all. See our paint stripping project to remove the gloss paint. 50/50 is fine for sealing plaster. To plaster over paint its better to put it on undiluted and then plaster when its tacky.