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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.
Buy individually or both books together. Delivery is free!


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Building Regulations and Standards: PUR/foil

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    • CommentAuthorTerry
    • CommentTimeApr 20th 2009 edited
     
    The issue of shrinkage was raised a couple of years ago on this forum. Since then I have monitored a cavity batt left out in the open. The only change I have noticed is degradation round the edges of the foam - presumably due to UV?? Other than that, board dimensions dont seem to have changed. Thickness measured with a decent quality vernier, length & width measured with a tape measure - so not necesarily highly scientific. No idea how old the board was before we recieved it.
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      CommentAuthorfostertom
    • CommentTimeApr 20th 2009 edited
     
    Mike, I meant No, the performance would be worse, but Yes, the blowing gas is replaced by air.

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