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  1. #1
    Join Date
    Jul 2007
    Location
    reservoir
    Posts
    39

    Default zincalume roofing screws question

    hi all,
    Glad to report have just passed structural inspection!!! phew......


    Getting ready to clad roof and will be using roofing blanket and zincalume. I am told that the roofing blanket is 55mm thick. I was intending on using 14-10 x 65mm self drilling Buildex Type 17 hexagon head Screws with seal but am concerned about how much the screw will go into the trusses. The suppliers of the roofing material tell me that they usually use 50mm screws with a blanket so does this mean that the blanket can be compressed?

    thanks
    greg

  2. #2
    Join Date
    May 2004
    Location
    Melbourne, Australia
    Posts
    0

    Default

    Yep.

  3. #3
    Join Date
    May 2003
    Location
    Kuranda, paradise, North Qld
    Age
    63
    Posts
    2,026

    Default

    Quote Originally Posted by gg23 View Post
    .........but am concerned about how much the screw will go into the trusses...........
    I hope you mean batten or purlin rather than trusses.

    Mick
    "If you need a machine today and don't buy it,

    tomorrow you will have paid for it and not have it."

    - Henry Ford 1938

  4. #4
    Join Date
    Sep 2007
    Location
    Sydney
    Age
    62
    Posts
    133

    Default

    Is the roofing corry or trimdek (square lock) profile? The reason I ask is they have a different profile height and so need different length screws.

    If it is corry, 12-11x50 type 17 hygrip screws are perfect, even with blanket. If you have trimdek or equiv. then 12-11x65 is the one to use.

    Also, unless you have an unusual requirement, you don't need to spend the extra (lots) for 14g screws, 12g is fine for non cyclonic areas, they are cheaper and easier to use.
    Cheers

    Alan M

    My Daughter's food blog www.spicyicecream.com.au

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