Quote:
Originally Posted by mhennessy
In my cellar, I've had good results with spruce ply - available for about £30 (4' by 8' sheet, 18mm thick) in B&Q, so presumably much cheaper anywhere else. It won't finish brilliantly, but is easy to cut and machine, and putting that under the plasterboard should work well structurally. I don't know if it would be any better than OSB though...
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No it wouldn't be better than OSB3. OSB3 is structural, regular ply isn't.