Flat warm roof - which vapour barrier

Joined
26 Nov 2010
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Location
Yorkshire
Country
United Kingdom
Hi
I am replacing my flat felt roof with a fibreglass warm roof. I was initially recommended to use visqueen fully bonded vapour barrier beneath the insulation as it is self adhesive and there is no need to prime the OSB. However, I need 26 meters and it comes in 20m rolls for £198.

What other options do I have where I won't get as much wastage?

Thanks
 
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exotic

Well if you could find another way to bond it, then there is this for a fraction of the price.
 
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