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Green Building Bible, Fourth Edition
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Housing - New Build: Suggest SIP, cassette, volumetric suppliers?

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      CommentAuthorfostertom
    • CommentTimeAug 23rd 2007 edited
     
    Anyone suggest favourite suppliers of alternative ways to prefabricate the little one-room Office, pictured? The cols and beams supporting the unit form a garage space, to be board-clad on site. Upper wall finish is feather-edge cedar boarding; roof is slate - unfortunately can't use shingles as it's built right on the boundary.

    a) SIPs
    b) framed cassettes, i) stud framed, b) I-joist frames
    c) volumetric i.e. completely pre-finished in a factory and craned in, in one piece

    The last would allow us to do without scaffolding, but would have to be slated in the factory. Width incl. slate eave overhang is within the magic 4.2m max for volumetrics.

    http://i30.photobucket.com/albums/c301/fostertom/sk002.jpg
    http://i30.photobucket.com/albums/c301/fostertom/sk.jpg
    http://i30.photobucket.com/albums/c301/fostertom/sk001.jpg
    • CommentAuthortony
    • CommentTimeAug 23rd 2007
     
    Why ever not build it where you want it. Don't be afraid of scaffolding costs they are very cheap compared to prefabrication of a special one off ( guess 10x the cost). If you must use a crane then build it in the driveway or garden and crane it into position.

    I hate to sat this but it is almost an ideal build fir timber frame. Whole thing over and done in a week easily. I hate SIP's so wont even consider them as an option.
  3.  
    Tony, can I ask why you hate SIPS?
    • CommentAuthortony
    • CommentTimeAug 23rd 2007
     
    Because I do not agree with the notion of combining insulation with structure. I even think that aerated concrete blocks ware a big mistake.

    SIP's are near impossible to repair and difficult to alter, extend or upgrade/renovate.
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      CommentAuthorfostertom
    • CommentTimeAug 24th 2007
     
    tony, by timber frame you mean prefab panels, not timber framed on site (which is another option)?
    • CommentAuthorSaint
    • CommentTimeAug 24th 2007
     
    SIPS are sandwich panels. Sandwich panel technology based on a simple structural I-beam theory is possibly one of the greatest advances in structural manufacturing ever leading to tremendous advances in whatever industry utilises them. Obviously the core of a sandwich panel can be made from many different materials. The fact that for most constrruction purposes the required structural performance of the SIP can be achieved using a foam insulation as a core between standard timber sheets is a tremendous bonus.Structural strength and good thermal. If you've had problems with SIPS I suggest you change your supplier
    • CommentAuthortony
    • CommentTimeAug 24th 2007
     
    Tom, not prefab - fabulously expensive for a one off like that -- framed on site is the only way to go for that job unless someone is very rich.
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      CommentAuthorfostertom
    • CommentTimeAug 24th 2007
     
    tony, you mean simple stud and ply (supplied uninsulated) prefab'd panels wd be faBULOUSLY EXPENSIVE?
    • CommentAuthortony
    • CommentTimeAug 24th 2007
     
    yes compared to making them on site with the parts -- try for a quote if you dont believe me.

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