On Fri, 3 Jun 2011 23:12:42 +0100, newshound wrote:
It doesn't say but I wouldn't be happy at much over a foot. I guess
you actually put them along the joints in the 22mm chipboard loft
boards so that's every 400 odd mm. There will be movement in those
They would also have to be fixed to the ceiling joists and how do you
fix the loft boards down? Screw into the tops of these things?
Any why 175mm? OK on top of your standard 100mm ceiling joist you get
275mm, just a little less than the recomended 280mm of insulation but
boarded over you don't need 280mm as the boards also provide
I did some vague maths on this the other week. 100mm glass fibre
covered with 22mm chip is not that far short of the recomended level,
certainly as good as 200mm glass fibre and not worth the agro of
fitting say 50 or 100mm cross joists IMHO.
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