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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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    • CommentAuthorgravelld
    • CommentTimeMay 9th 2018
    I need a solution for my cavity! :shocked:

    As part of a wider project I need to sort the partial fill masonry cavity walls. They are about 55-60mm with about 20-30mm fibrous/wool type insulation. That's obviously paltry, but on top of that I guess it isn't installed well.

    PU foam looks like a good solution to fix it. Inject it to compress the existing insulation, and also gain some air tightness benefits.

    My first quote is in: £63/m3

    If you're pricing in terms of labour rather than insulant volume, it's almost £2k per day per worker... this seems quite high! But obviously both approaches to pricing include both elements. Note the installers are very approachable and we have discussed ways to ensure a good install, e.g. finishing the top from the eaves.

    Anyone else had this done and have a price to compare to?

    Obviously could go the self pour route but wouldn't be getting any AT benefit, higher conductivity and it's questionable whether the pour would be that successful in terms of leaving gaps etc.
    • CommentAuthortony
    • CommentTimeMay 9th 2018
    I would pour or blow eps beads in instead
    • CommentAuthorgoodevans
    • CommentTimeMay 10th 2018
    do you mean £63/m3 or £63/m2 - I suspect the latter (Insulation at £63/m3 is a reasonable ball park value without fitting).
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