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well thats it, theres no writing. any other info? there is no markings whatsoever.

silly question but which way up should my breathable felt go? the label says coloured side up, it has a black slightly shinier side and a white holey side. it makes sense to me that the shinier side is more water resistant, whereas the porous looking side lets the moisture through. i was...

ok thanks noseall. so can i fix plasterboard straight onto the celotex? do i need an air gap at all? sorry real beginner here.

also i am looking to hide all the pipework within the stud

ok thanks, so is this all i need to use? i work for a timber merchant so timber, celoxtex and plasterboard, etc is cheaply available so would ideally like to go down this route.

hi i am converting a single skin (3 sides) coal shed with pre cast concrete flat roof into a bath/shower room. what is the best way to insulate the walls, floor and ceiling to insure no damp, etc. i figured for the walls making a 100m stud inside, filling with 100mm celotex, etc...