I have made a deep chasing into a wall to take 2 copper pipes for CH. If I fill this with expanded foam will plaster stick to the foam. I had thought about putting plaster board over the void and filling with foam as a backing for support but I might be able to dispense with the PB.
Kevin
No it wont,why put PB over the void? why not just slap the plaster in there when you're plastering it?
I didn't think that cement direct to copper pipe was acceptable so I am guessing that plaster direct onto copper might be frowned upon, plus the amount of plaster it would take.
Kevin
plaster will stick to expanded foam, but it's a pain in the arse, if the chasing is deep enough, cover the two pipes with fibreglass insulation and plaster over - the pipes will have room to expand and contract and the plastering will be easier. Failing that, it's ex-foam *then* strips of plasterboard set into it, then plaster.
Tony
Or more precisely Expamet Exmet on page 17
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