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minimum pitch for corrugated iron roof?

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  1. #1
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    Talking minimum pitch for corrugated iron roof?

    Evening all,

    I have been looking at replacing the roof on the lounge (it's already stuffed which makes me confident i can't do any worse ).... and extending it out as a deck at the same time.

    my problem is.... all the web searching on minimum falls and pitches for corrugated iron roofing has left me more confused than when i started. ive seen "standards" from 180mm over 9metres up to a whopping 1metre fall over 9metres.

    now it would be great if everyone could go out in the dark and measure their roof pitches for me but i dont think that's going to happen.

    can anyone give me a rule of thumb for calculating the minimum fall of a corrugated iron roof?

  2. #2
    Senior Stinkologist Sir Stinkalot's Avatar
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    Alll depends on the profile .... as little as 1

    Try checking bluescope steel website for the profile you want to use and it will give you the minimum pitch.
    Licence to drill!

  3. #3
    Senior Member macca2's Avatar
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    Have a look at stratco .com.au It will give you minimum falls for any iron roof.

    macca

  4. #4
    Senior Stinkologist Sir Stinkalot's Avatar
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    Or here ..... 5 or 1:12.
    Licence to drill!

  5. #5
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    Talking

    or http://www.stratco.com.au/products/r...corrugated.asp


    thanks everyone - my web searching skills suck, mystery solved though - general consensus is 1:12 for traditional corrugated iron

  6. #6
    I'm proof, there is a Dog Grunt's Avatar
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    From an aesthetics point of view, I prefer a high pitch roof. If you are trying to sell a house in Brunswick with skillion roof on the back, you will get less money than one with a high pitch roof.

  7. #7
    Diamond Member Barry_White's Avatar
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    Minimum pitch for corrugated is 5 degrees. Trimdek profile goes down to 2 degrees and kliplock will go down to 1 degree.
    Regards Bazza

    Skype Username: bazzabushy

    "Experience is a hard teacher because she gives the test first, the lesson afterwards."
    -Vernon Sanders Law

    The views expressed by the poster are general in nature and any advice should be taken in this vein. The poster accepts no responsibility if this advice is used. When undertaking any work personal professional advice should be sought from suitably qualified persons in the field of work being undertaken.


  8. #8
    Apprentice (new member) gasp's Avatar
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    Default pitch of roof

    For corrugated steel roofing where the rafter length can be covered with a single sheet the minimum slope is 1:11 for lapped sheets its 1:8

  9. #9
    Diamond Member Barry_White's Avatar
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    No one uses multiple sheets lengthways on roofs today unless it is over 21 metres which is the maximum length Lysaghts can carry on an extended semi-trailer.

    When I worked for Lysaghts for 11 years it was, and still is 1 in 12 for corrugated.
    Regards Bazza

    Skype Username: bazzabushy

    "Experience is a hard teacher because she gives the test first, the lesson afterwards."
    -Vernon Sanders Law

    The views expressed by the poster are general in nature and any advice should be taken in this vein. The poster accepts no responsibility if this advice is used. When undertaking any work personal professional advice should be sought from suitably qualified persons in the field of work being undertaken.


  10. #10
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    Quote Originally Posted by Grunt
    If you are trying to sell a house in Brunswick with skillion roof on the back, you will get less money than one with a high pitch roof.
    Just as well I dont have one to sell then??

    Al :confused:

  11. #11
    DJM
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    Default roof pitches

    From various manufacturer's technical specs:

    LYSAGHT Trimdeck 2%
    LYSAGHT Klip-Lok 1%
    STRATCO Pro-Dek 1%
    STRATCO Smartspan 2%
    METROLL Metlock 1%
    METROLL Trimclad 3%
    LASERLITE 5%


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