ive bought some 22mm jotoba off ebay and want to fit it in my bathroom. i will lay tiles round bath. i can either screw down existing floor boards and lay over this, or rip up and lay jotoba onto joists. question which would you recommend if former existing floor boards a little domed but i could plane off in which case float (what membrane?), glue down or screw? if later should i just scre jotoba to joists.
cheers jon
cheers jon