I have a mate who is Plasterboarding a room out, he is erecting studding both on the walls and the ceilings. He wants to be able to fix the plasterboard wherever he wishes, not just along the joists. For the walls he plans to put Tongue&groove Chipboard up first, but he is not sure what to use on the Ceiling. I dont think there is anything on the market that is specific for this but was just wondering if anyone had any recommendations or had done it themselves? Thanks.