Do I need these?

Discussion in 'Roofing and Guttering' started by bluebaron, 28 Nov 2021.

  1. bluebaron

    bluebaron

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  3. RandomGrinch

    RandomGrinch

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    Hi,

    As per the information on the web page, they recommend 12 fixings per 1200 X 2400 board.
    I may be wrong - am only a DIY-er :), but that seems a decent number of fixings to avoid uplift.
    I don't think it would be the best idea to fix the boards just around the edges!

    Edit:
    I just reread the webpage, 'For a 2400 X 600 T + G board we recommend 8 fixings per board'
     
    Last edited: 28 Nov 2021
  4. bluebaron

    bluebaron

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    Yep but I’m assuming that refers to loose sheets not T&G which will in effect when glued forms a large sheet. Hence only requiring fixing at the edges.
     
  5. RandomGrinch

    RandomGrinch

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    I suspect that a 4 X 6 m board 18mm thick would probably be quite flexible and could suffer from uplift!
    And as the manufacturer recommends 8 fixings for a T&G board, I would be happy to go with that.
    But they would say that wouldn't they ;)
     
  6. ^woody^

    ^woody^

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    You don't need them
     
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  8. RandomGrinch

    RandomGrinch

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    Go with the boss! (y)
     
  9. catlad

    catlad

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    There for fixing your insulation down and helping to minimise thermal bridging.
     
  10. bluebaron

    bluebaron

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    Thanks woody, can I assume I don’t need anything then?
     
  11. bluebaron

    bluebaron

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    sent them back, ill screw some 150mm screws through the lot instead, (yes I know slight thermal bridge).

    18mm OSB3/VCL/150mm PIR/18mm OSB3//Edpm
     
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