119 x 19mm TG&V boards to car port roof - advice please

Discussion in 'Roofing and Guttering' started by Sam Maguire, 31 May 2020.

  1. Sam Maguire

    Sam Maguire

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    Total car port size = 9.6m x 3.6m
    Roof pitch circa 9 degrees and will be fitted to and between main house and boundary wall.
    Main frame to be 175 x 44 @ 600 ctrs on hangers on ledgers both sides.
    For aesthetics we are going with treated 119mm x 19mm t&g boards onto the joists and exposed below. Cost a bit more and labour intensive but that's the finished look we want.
    Just a couple of queries:
    I plan to top fix the t&g boards to the joists with 2 no. 50mm lost head nails per joist. I don't need to hide the fixings so though this would be easiest as opposed to secret nailing. With 4.5m lengths of treated t&g I think I might struggle to get all the interlocking joints good and tight so was avoiding secret nailing via the tongue. I am reading that ratchet type clamps might help - are they worth considering ?
    Do I need allow for expansion of the t&g sheeting anywhere particular close to walls ?
    EPDM roof to be bonded to to t&g sheeting. Firestone 1.14mm.
    Open to all suggestions please about any aspect of the above.
     
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  3. catlad

    catlad

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    Never seen those boards! whats wrong with using the normal 2400x600 0sb3 TG boards?
     
  4. Sam Maguire

    Sam Maguire

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    We like the look of the boards from the underside which will be exposed. Purely aesthetics.
    Not unlike alot of the carport / garden rooms that can be purchased online.
    I see from online videos that board installation starts on the lower side and work upwards ?
     
  5. datarebal

    datarebal

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    sounds more like a french train
     
  6. Sam Maguire

    Sam Maguire

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    See photo
     

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  7. catlad

    catlad

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    It that's the look your after then use floor boards.
     
  8. Sam Maguire

    Sam Maguire

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    I guess they are floor board sizes except they are treated which I thought would be wise with the underside exposed and open ends to car port.
    Any advice on the queries raised ?
     
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