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  1. #1
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    dave 62 pb is offline

    Question for any roofers on here

    Q, Why do big 6 roofing sheets have a chamfer on one side , is this for adjustment ?

    I am replacing the asbestos sheets with new cement fibre , should I cut chamfer the same or leave alone


    Don't worry on the asbestos removal as I deal with it every day at work so know how to handle it

    Cheers

    Dave

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  3. #2
    My name is Martin 30psi's Avatar
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    30psi is offline
    If I was to guess, I'd assume the chamfered edge to be the overlapping side of the sheet. It won't have a noticeable step then.

    But I could be talking bollock
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  4. #3
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    stonefree is offline
    More for alignment

    If we were sheeting a large tank say 10m x 5m dia with flat sheet , we would put a kink on one side to give the metal a sealed edge, even if no sealant was applied.
    It also put a bit of pressure on that joint, the next sheet put pressure on the other end, the end or ends would have similar fabricated in to lock the whole thing up
    If Corrugated Big 6 Sheeting the shorter "peak" goes over the longer peak on the next sheet, I would try to go over 2 peaks, but that can be difficult with cement sheets, it's not a problem with metal

    I didn't generally do roofs, But did a good few large Oil Tanks like you get in refineries

    Storage tank.jpg


    Cut it off ? personally I wouldn't

  5. #4
    Official RnS Addict 29stude's Avatar
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    If you’re referring to the corner mitre, then these are required to allow overlapping layers and rows of sheets to sit flat.


    I’m not a roofer, but was advised by one when I did my workshop in cement fibre.



    https://www.roofingsuperstore.co.uk/...t-roof-sheets/

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