Mark

[mark hamilton]

I have boarded out my laundry room with celotex, do I have to board over it or can I just leave it

[The Natural Philosopher]

If you have sealed and foiled it, that is all you need to do from the insulating point of view, but seriously, you want a tinfoil coloured room?

[John Rumm]

So long as its vapour tight (i.e. foil faces, ali tape on all the joins etc), then you don't need to do more. However it is rather vulnerable to damage like that, so a skin of ply or plasterboard would help protect it and leave you a surface that could be decorated.

[Andrew]

I wouldn't. You should overlay it with plasterboard, or if money is no option, Fermacell. The former ought to be skimmed because it is a wet room. The latter can be sealed with their proprietory smooth-finish stuff that is ready-mixed, painted on, squeegeed off and fine-sanded when dry.

[Brian Gaff (Sofa]

Great, that would be amazing man.... Brian

[GB]

If it catches fire, it releases cyanide. Plasterboard it.

[GB]

Incidentally, some tumble dryers catch fire when they get full of lint. Our Miele one switched itself off and displayed an error code saying what the problem was. :)

[Andrew]

Celotex will not catch fire until it is exposed to temperatures much higher than a domestic fire. It will char and pong a bit (hopefully) but that's it. Still a bad idea to leave it unprotected though.

expanded and extruded polystyrene is a different animal, this really will burn furiously and give off lots of deadly smoke.

[jon]

...add petrol and you get napalm