On Apr 23, 11:51 am, "George" wrote:
"Kev" wrote in message

ps.com...

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