Hi, Iam attempting to try to do a cheap, diy cellar conversion and wondered if anyone could give me some tips? At moment I have bricks walls in cellar and have sealed with pva, I was going to paint walls with bitumen emulsion and then baton and board out with foil backed plaster board? Is this a good idea? , the walls or floor do not feel wet. Someone said I should not bother with batons and dot and dab plasterboard and maybe use aquaboard on one wall that feels slightly damp in certain places. Anyone got any ideas? thanks, J