It says on their website you can’t screw these direct to joist. I can’t see why not. Surely I shouldn’t have to chipboard all the walls as Well? They also say to tile the smooth side of the 12mm board, is this the side with hardie backer barcode etc?
Have you understood the instructions correctly? Joists will be on floors and ceilings. Walls will be studs and noggins. There's an installation guide you can download iirc.
Think there may be a technical jargon issue here. As Willy says. Joists are floor/ceiling. Studs are walls.
Yeah I see now. I have 6mm for floor anyway which is already chipboard. So anyone know what side to tile on for walls, is it the side with barcode?
James Hardie have got a great website with all the info ur gonna need, plus loads instal videos both on website and YouTube Think you’ve misunderstood somewhere as wall boards ‘should’ be fixed direct to studs and not over plaster board, etc Boarding a floor can go over chipboard or floorboards, after laying a bed of cement based tile adhesive Or Hardie do a thicker board ‘Hardie Floor’ which replaces the timber and is fixed direct to joists 6mm board is tiled on grid side 12mm board is tiled on smooth Grab yourself a cuppa and spend some time looking through the website, all info at ur fingertips