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As in the title i've got a good supplier for polystyrene and is it just a case of spray mounting some foil on the top as i'm baulking at the idea of paying £42 a sheet.
Iain
celotex isn't polystyrene. It's polyisocyanurate.
huge difference in thermal values; this might not be an issue?
Also the real celotex is fire retardant. Polystyrene is a bit more like napalm - as anyone has a memory of the fad for polystyrene ceiling tiles in 1970s kitchens will fondly recall. Its raining sticky fire!
Polystyrene also reacts with PVC - so cant have it near any pvc cable insulation or water pipes.
So - [i]apart[/i] from the fact it has a lower thermal rating, is a fire risk and reacts with PVC......
scotroutes - Member
So - apart from the fact it has a lower thermal rating, is a fire risk and reacts with PVC......
There's also the spray mount - does that stay highly flammable when out of the can?
and the release of formaldehyde.So - apart from the fact it has a lower thermal rating, is a fire risk and reacts with PVC...
try kingspan seconds, can't be bothered to look for a link 😉
+1 for the alternative
the tin foil will be fine though - although it can play havoc with your fillings.