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  1. #1
    Join Date
    Apr 2005
    Location
    qld
    Posts
    8

    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
    Join Date
    Nov 2001
    Location
    Parkside - South Australia
    Age
    46
    Posts
    479

    Default

    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.
    Now proudly sponsored by Binford Tools. Be sure to check out the Binford 6100 - available now at any good tool retailer.

  3. #3
    Join Date
    Jan 2003
    Location
    Perth,Western Australia.
    Posts
    64

    Default

    Have a look at stratco .com.au It will give you minimum falls for any iron roof.

    macca

  4. #4
    Join Date
    Nov 2001
    Location
    Parkside - South Australia
    Age
    46
    Posts
    479

    Default

    Or here ..... 5° or 1:12.
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  5. #5
    Join Date
    Apr 2005
    Location
    qld
    Posts
    8

    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
    Join Date
    Oct 2003
    Location
    Romsey Victoria
    Age
    63
    Posts
    2,102

    Default

    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.
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  7. #7
    Join Date
    Oct 2003
    Location
    Kentucky NSW near Tamworth, Australia
    Age
    86
    Posts
    1,067

    Default

    Minimum pitch for corrugated is 5 degrees. Trimdek profile goes down to 2 degrees and kliplock will go down to 1 degree.

  8. #8
    Join Date
    May 2005
    Location
    Cohuna
    Posts
    0

    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
    When reality hits, it hits hard!

  9. #9
    Join Date
    Oct 2003
    Location
    Kentucky NSW near Tamworth, Australia
    Age
    86
    Posts
    1,067

    Default

    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.

  10. #10
    Join Date
    Aug 2003
    Location
    .
    Posts
    4,816

    Default

    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
    Join Date
    Mar 2005
    Location
    Canberra
    Posts
    3

    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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