We have a house full of artexed ceilings which obviously aren't staying. Today a plasterer came round to quote for the first room we're dealing with and he basically said plastering over artex (after sealing it) usually doesn't last properly so the only sensible way to deal with it is to put up plasterboard instead then plaster that. We'd lose a centimetre or two of room height and it costs more. I'm not sure what the best course of action is-we have a LOT of ceiling that needs sorting over time. Does anyone have any wisdom to share?