Malcolm Daniels
New Member
Original plasterboard may not have had mist coat by builder (not on 3 of the 4 walls anyway). When painting we get tiny bubbles in patches, they have not gone when the paint dries (house is 20 years old now & painted 3 times - spare bedroom!).
Clearly something has been wrong all this time, removing a dado & wallpaper over bottom half of room, with the intention to go back to fully painted walls has exposed the fact that the previous coat of paint on 3 walls can be peeled off like skin. We were told to PVA the walls before that coat of paint to help it 'stick', didn't work as it bubbled anyway, but now we can just wash the PVA off.
As we cannot strip it back fully (back to bare plasterboard), would it be wise to put a coat of Zinsser Gardz over all the walls, so we may achieve a good 'key' for a plaster skim. We don't want whatever causes the bubbling to just carry on doing it, even through a new skim of plaster - feels like we'd just be applying the plaster to something that isn't 'sound'??
Trying to minimise further upheaval, can't really re-board & start from scratch altogether! Thanks.
Clearly something has been wrong all this time, removing a dado & wallpaper over bottom half of room, with the intention to go back to fully painted walls has exposed the fact that the previous coat of paint on 3 walls can be peeled off like skin. We were told to PVA the walls before that coat of paint to help it 'stick', didn't work as it bubbled anyway, but now we can just wash the PVA off.
As we cannot strip it back fully (back to bare plasterboard), would it be wise to put a coat of Zinsser Gardz over all the walls, so we may achieve a good 'key' for a plaster skim. We don't want whatever causes the bubbling to just carry on doing it, even through a new skim of plaster - feels like we'd just be applying the plaster to something that isn't 'sound'??
Trying to minimise further upheaval, can't really re-board & start from scratch altogether! Thanks.