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Fastening down 150mm flat roof

Discussion in 'Roofing and Guttering' started by Glanmor, 21 Mar 2016.

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  1. Glanmor

    Glanmor

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    Hi all,
    Im nearly ready to lay down 6x6m warm-deck flat roof single story with 150mm insulation sanwiched between 18mm OSB3 T&G sheets. EPDM on top. Having read about wind uplifts and need to secure things down, can I ask for some advice on fastening down 150mm/OSB sandwich please.
    Is it feasible to use very long (200mm-250mm) nails or screws to reach the joists given that there will be some firring on there too?
    If I can get hold of very long screws would it be normal to go this way?
    If not what other ways to fasten this roof down please.
    Seeing that deck will be held down by thik metal roof starps, long thin nails/screws to hold down the insulation part make me think is this right.
    Any recomendation on choice of fasteners if you can also.
    Thanks for taking time to read this.
    Cheers
     
  2. Bilabong007

    Bilabong007

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  4. chappers

    chappers

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    twist fix will work but you will need to pilot the OSB, you won't nail directly through 18mm with them, screws will work fine too.
     
  5. jontop

    jontop

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    9" timberlocks
     
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  7. Glanmor

    Glanmor

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    Bilabong007, chappers and jontop - thanks for all the advice.
    Chappers - thanks for the tip on piloting holes in OSB.
     
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