wiss20

Yeah going to be skimmed over,, not looked into using foam to fix with actually,, the reason for the osb was to give strength when boarding over battens (300 centers on battens) at least the walls will be solid without the hollows of dat and dab,, so if I do go down the batten route would I be best to put a vapour barrier direct onto the blockwork behind the battens?

Hi, I'm going to be boarding out my extension walls soon,, I'm planning on battening then 9mm osb then 12.5mm plasterboard over that (no insulation) some of the walls are external (100mm cavity, brick/wool/block) do I need a vapour barrier behind the osb at all on the external walls?? I'm not keen on dot & dab, also I'm doing this myself so think this will be easier not to make a mess of !!