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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Products: Thickness of larch cladding timber?

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  1.  
    • CommentAuthorIDN101
    • CommentTimeApr 14th 2009
     
    Hi,

    Can anyone recommend a thickness of larch cladding timber?

    Many thanks

    Regards,
    Ian
    • CommentAuthortychwarel
    • CommentTimeApr 14th 2009
     
    it depends on the system of overlap

    vertical boards with cover strips 150X19 with 50X19 cover strips

    horizontal shiplap 19-25mm with minimum of 8mm thickness on the overlap

    or horizontal tapered boards 19 tapered to 10.
    • CommentAuthorCWatters
    • CommentTimeApr 14th 2009 edited
     
    Horizontal wany edge board appears to be available in eithet 19/20mm or 25mm. I guess it depends on your budget.

    Some sites I've bookmarked as I've researched for my project....

    http://www.vastern.co.uk/tc-waney-edge.html
    http://www.vastern.co.uk/tc-fixing-advice.html
    http://www.vastern.co.uk/tc-fixing-waney.html
    http://www.northwoodforestry.co.uk/index.php?Itemid=7&id=27&option=com_content&task=view
    http://www.ewtimber.co.uk/exterior_cladding.html

    Scroll down for profile options but I don't think UK Larch is normally profiled as the knots fall out if it's cut thin. I think that's the reason but not sure.
    http://www.cornishwoodland.co.uk/products/architectural/cladding.htm

    Make sure you use nails made of the right material. Not sure what's recommended for larch, possibly Stainless Steel. (I know Iron isn't recommended for oak as it stains the oak)...

    http://www.nail-it.co.uk/
    http://www.inox.ie/acatalog/Ringshank_Nails.html

    Apparently there is a right way around for each board to ensure any cupping is in the right direction.
    • CommentAuthorIDN101
    • CommentTimeApr 15th 2009
     
    Brilliant info. Many thanks.

    Regards,
    Ian
    • CommentAuthorsinnerboy
    • CommentTimeApr 19th 2009
     
    Watch out for proximity to boundaries - there are limits on the amount of combustible material you may use as external cladding

    Assuming you are building a house - read Part B4 carefully - around p45

    http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADB1_2006.pdf
    • CommentAuthorCWatters
    • CommentTimeApr 19th 2009
     
    Good catch sinnerboy. The timber clad outbuilding I'm constructing is going to be > 1 meter away from the boundary so I don't need to involve BC. (It's >15sqm but <30sqm).
    • CommentAuthorsinnerboy
    • CommentTimeApr 20th 2009
     
    CW - continue to check guidance at page 48

    So - if you have 20m2 of cladding - half this is 10m2 . Then add area of windows - lets say another 8m2 giving a total 18m2 of unprotected area

    For 18 m2 - Method 1 ( Diagram 22 ) would require the elevation to be set back 3m from the boundary
    • CommentAuthorCWatters
    • CommentTimeApr 20th 2009
     
    Thanks.

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