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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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Products: Rockwood Insulation Question

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    • CommentAuthorTriassic
    • CommentTimeApr 26th 2015 edited
     
    I've got the opportunity to buy 158 Packs of 100mm Rockwool External Wall Duel Density Slab insulation for£300, could I use it for the exterior insulation of my timber frame New build? If so, how would you fix it and could I render over it?
    • CommentAuthorowlman
    • CommentTimeApr 27th 2015
     
    "ROCKWOOD" Could that be the new Glastonbury, Who's gonna headline, maybe " The Insulators" tell us more Steve? :bigsmile:
    • CommentAuthorTriassic
    • CommentTimeApr 27th 2015
     
    An insulation firm has gone bust and there are around1000 packs of rock wool slabs going for around £300 for 200 packs. Insulation has never been so cheap, well not since the B&Q Eco days.
    • CommentAuthorCerisy
    • CommentTimeApr 27th 2015
     
    I used 75 mm semi-rigid glass fibre slabs on the exterior of our frame. I fixed horizontal timbers at 60 cm centres, fitted the insulation between, then covered it all with breathable fabric and then the battens / cladding. Tedious, but it will keep the frame warmer! Not sure how you would use 100 mm slabs as the timber would be quite deep and be difficult to fix without them being pulled downwards by any cladding?? Can you use it for the roof space?
    • CommentAuthorEd Davies
    • CommentTimeApr 27th 2015
     
    (Owlman, if you're going to be picky about Triassic's spelling/typing you could also point out it's likely “dual density”, not “duel density”. Mineral wool slabs at dawn. Glastonbury Tor rising out of the early morning mist. Kubrick ought to have made a film about it.)

    I keep saying it but Larsen truss? Do you need to render over it (planning requirement or something) or would a ventilated cavity and rainscreen not be another option?
    • CommentAuthorHairlocks
    • CommentTimeApr 27th 2015
     
    Where abouts are you Triassic, could you get me some for my shed?
    • CommentAuthorJC48
    • CommentTimeApr 27th 2015
     
    Hi the rockwool detials are in their Facade range see this link http://www.rockwool.co.uk/technical+resources+centre/downloads/brochure+library#change.nodeFilter.Facade+Systems
    Looks an option to me - If the price is right
    • CommentAuthorMike George
    • CommentTimeApr 27th 2015 edited
     
    Needs to be the right 'rockwool' for EWI I think. and there are many variants...

    Not an insulation I would choose for EWI myself for lots of reasons - not least the thickness require to hit the target u-vale is greater than rigid insulants which by definition are more robust
    • CommentAuthorTriassic
    • CommentTimeApr 27th 2015 edited
     
    • CommentAuthorJC48
    • CommentTimeApr 30th 2015
     
    Well I bought some were we all bidding against each other ??? just need to sort collection and delivery to Oxford now
    • CommentAuthorHairlocks
    • CommentTimeMay 1st 2015
     
    Not me, it was too far away for the small amount I would like.
    • CommentAuthorTriassic
    • CommentTimeMay 1st 2015 edited
     
    Looks like you got a real bargain.
    • CommentAuthorJC48
    • CommentTimeMay 2nd 2015
     
    Just for info I bought 158 packs which is 13 pallets for £500 plus VAT and delivery from Newcastle to Oxford is £500 plus Vat shame it wasn't closer but haulage isn't that bad so Bidspotter Auctions are a good place to look

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