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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.

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    • CommentAuthormarsaday
    • CommentTimeAug 23rd 2018
    Does anyone know where i would go to get info on a stronger glass to use in my roof light install.

    I am at the stage of building the roof joist structure and enclose a photo of it so far.

    I have positioned the three lights with a 300mm gap between them and i don't want to make this any bigger.

    So when all built i realise i may have some issues with getting up to the gutter above this flat roof extension to do maintenance.

    So i was thinking could i get a stronger glass. Glass which would accept some timber batons laid on them and then some small scaffold unit built off these ?

    I have spoken to pilkington technical and they say the "proper walking glass" would need to be specified which is about 35mm thick, but this cannot be used on a 12 degree pitch roof anyway.

    So she said i would need an engineer to specify for me.

    It may be too complicated to solve this and it isn't the end of the world, but i thought if i could use a stronger laminated top pain of glass which i have designed for these windows already (double glazed unit 2 x 4mm plus outer 6mm pane).

    So has anyone had any experience of this with windows and any pointers on where to have a chat with someone in the know ?

    • CommentAuthorbarney
    • CommentTimeAug 23rd 2018
    Build some up stands between the windows - on the rare occasions you need to get up there, you can put a Youngman deck across these to stand on, without ever touching the glass.

    The sorter span suggests you put them at the wall of the existing house and at the transition to the new building

    Failing that, you could simply lay timbers on the roof until you exceed the height of the glazing (allowing for a bit of bend in the temporary deck and again use a Youngman deck

    Construction Design and Management Regulations !!


    • CommentAuthortony
    • CommentTimeAug 23rd 2018
    For me it is a 3g unit, bottom pane 6.4mm laminated, middle 4mm toughened and top 6mm toughened stepped 50mm bigger and don’t walk on it, bridge something over them for gutter cleaning ot use can long stick.
    • CommentTimeAug 23rd 2018
    If you're working above the rooflights, you'll also want to put a cover over them anyway, to protect them against dropped tools, or people etc.

    I expect that glass that's strong enough to deal with point impact loads without damage is going to be way too expensive. Barney's plan sounds like a winner.
    • CommentAuthormarsaday
    • CommentTimeAug 23rd 2018 edited
    Thanks for the info. Yes i am not going to bother with the glass option. I will look into the Youngman deck as Barney mentions.
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