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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.

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    Recommended washer to hold PIR to timber?

    I have seen ones specific for concrete and masonry but nothing for timber specifically? Is it just the screws that are different? Something like this okay:

    I only need say two washers per board to hold my PIR boards in place while I screw the PB on top of it. I could just use screws and no washers but I have found it rips through the foil an doesn't give a firm hold...

    • CommentAuthortony
    • CommentTimeNov 26th 2017
    Ordered. Thanks Tony

    Would you use 2 per sheet and allow the PB screws to take the main weight combined? Or use quite a few per board?

    • CommentAuthortony
    • CommentTimeNov 27th 2017
    4 or 6 per board, have done it with Just careful screws
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