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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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    • CommentAuthorlesp
    • CommentTimeAug 24th 2017
    I am about to slate the roof on a new build and have received some conflicting advice regarding the verge slates. We are using Spanish pre-holed 250x500 slates with a head lap of 90mm. The roof angle is 35 deg. and we are using a continuous plastic dry verge. My query is this: can I use a half slate on the verge or do I use a slate and a half? The roof is N – S facing and we are in South West Wales. I would be grateful for any advice that anyone could offer.
    • CommentAuthorowlman
    • CommentTimeAug 24th 2017
    I used Cambrian man made slates on my sunroom and used their 1.5s, alternating with whole tiles at the verges, but then I had to get it exact for the interlock. It certainly made a neat job. Personally I would think that splitting a 250mm tile wouldn't look as good, but that's just an opinion.
    P.S. I'm not a roofer.
    • CommentAuthorCWatters
    • CommentTimeAug 24th 2017 edited
    Normally tile and a half for natural slates... Page 19..

    • CommentAuthorCWatters
    • CommentTimeAug 24th 2017
    • CommentAuthorJamster
    • CommentTimeAug 24th 2017
    Tile and a half - make sure your roofers fix the dry verge properly (he says from bitter experience)...
    • CommentAuthortony
    • CommentTimeAug 24th 2017
    Building regs may let half slates by but if you are getting warranty insurance they won't.
    • CommentAuthorlesp
    • CommentTimeSep 3rd 2017
    Thank you all for the useful info. We have decided to go with the slate and a half
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