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Old 10-15-16, 03:27 PM   #3
tinco
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Join Date: Jan 2016
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Oh I should have been more clear, I'm putting the polyiso on the *inside*. So there'll be plasterboard cladding.

I found this:

Insulation Fixings for wood fibre boards

Which are nylon screws, I guess that would be better than metal for starters.
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