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Flat warm roof fixing insulation and top board

Discussion in 'Roofing and Guttering' started by thomp1983, 24 Sep 2021.

  1. thomp1983

    thomp1983

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    Hi,

    I'm building a flat warm roof, got the timbers and firrings on with 11mm osb glued and screwed on top, next will be a layer of vapour barrier followed by 120mm insulation, 18mm osb then the membrane.

    What do I use for securing the insulation and 18mm osb to the roof? Do I get some type of 150mm screw and screw down through the osb, insulation and vapour barrier into the 11mm osb?

    Thanks
    Chris
     
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  3. RandomGrinch

    RandomGrinch

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