Andrew0122
New Member
Hi all. I've just bought a 1930's house in the north of England anc currently stripping the wallpaper in the bedroom. In a couple of patches, lumps of black grainey "plaster" is falling off. This black material is coated with what appears to be a thin skim coat of light plaster (like icing). From reading various things on the internet, I am tending to think this is Ash Plaster/mortar. There appears to be conflicting repair info. Can I just remove the loose patched and fill with modern all purpose plaster and what should I prepare the black sutfae with prior to filling , PVA 1:1 mix ?? Your expert advice would be appreciated......