thinnest plasterboard or other plaster substrate?

Fred · 2010-07-24T20:57:57+00:00

Hi,I've been retrofitting celotex to a room. It's gone well except forone slight problem: the window reveal (I put 25mm celotex inside thereveal). I'm worried that even if I use 9.5mm, rather than 12.5mm,plasterboard on top of the celotex that it might overlap too much ofthe side of the window frame. I'm not sure how much of a problem thiswill be: any overlap will only be cosmetic, it's not going to blockthe window or prevent it opening or anything that drastic but will itlook "odd"?What would you do? Use 9.5mm PB? If there is an overlap (i) it willprobably be hidden by blinds/curtains/whatever SWMBO puts there or(ii) if we do see it, we may grow used to it.Alternatively is there something thinner than 9.5mm PB? I don't expectthere is a plasterboard any thinner because it would be too fragile totransport but can you plaster on top of say hardboard? Does it needany treatment first (primer? undercoat?) or just PVA?Or can you PVA celotex and plaster directly on to that?TIA

Jul 24, 2010 22 Replies

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The Natural Philosopher 9 years ago

you could expanded metal mesh, or lath...

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harry 9 years ago

Or, I have removed the foil and used plaster and PVA to put a thin skim of plaster direct onto the foam. No problems so far, five years ago.

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Andrew Gabriel 9 years ago

Yes, you can even PVA glass and plaster onto that.

It is also manufactured without foil on one or both sides, although finding a reseller might be a challenge.

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