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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.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthortony
    • CommentTimeNov 11th 2013
    No and I know someone who has done it with a small agricultural grain blower fan, worked like a dream.
    • CommentAuthorDarylP
    • CommentTimeNov 11th 2013
    My mum did it with an extension, albeit a fairly small one, poured them in from above, and blocked up the 'evidence' holes as the level rose.

    If you can get in from above gravity does the rest, providing you have a clear cavity....

    • CommentAuthorlineweight
    • CommentTimeJan 3rd 2019 edited
    **5 year thread bump**

    Just to clear up potential confusion about full fill insulation and whether it's allowed in the UK: the relevant bit of building regs (for England & Wales) is in Approved Document C (currently last amended in 2013) and it says:

    5.15 A full or partial fill insulating material may be placed in the cavity between the outer leaf and an inner leaf of masonry subject to the following conditions:
    a. The suitability of a wall for installing insulation into the cavity should be determined either by reference to the map in Diagram 12 and the associated Table 4 or following the calculation or assessment procedure in current British or CEN standards. When partial fill materials are to be used, the residual cavity should not be less than 50mm nominal; and
    b. A rigid (board or batt) thermal insulating material built into the wall should be the subject of current certification from an appropriate body or a European Technical Approval and the work should be carried out in accordance with the requirements of that document;

    The map and table shows for example that a (newbuild) 100mm full fill cavity with facing brick and recessed joints would be fine in zone 1 (eg London) but not in more exposed zones. But flush joints would make it ok up to zone 3, and that plus increasing the cavity to 150mm would allow you to use such a build-up in any zone including zone 4, the most severe.

    Of course all subject to products having certification, etc etc.

    That said: any potential downsides of using full fill rigid boards or any reason you wouldn't use them when you want a cavity wall with the best insulation value for a given overall thickness? More liable to bad installation than mineral fibre batts I guess?
    • CommentTimeJan 3rd 2019
    We're discussing Andy's suggestion
    Posted By: andy-cheshireI'm not sure what people think of it on here, but as I didnt "trust " the brickys with insulating the walls properly I had polybead platinum balls blown in afterwards

    Then he said
    Posted By: andy-cheshireMines brick outer skin so had it blown in pre plasterboard from the inside! I was a little sceptical as to how full the fill would be and how stuck together the balls would be, but I had a few areas I could "check" afterwards and I was very impressed!

    Sounds to me like not a masonry cavity wall, but brick skin on timber frame inner. That wd be different.
    • CommentAuthortony
    • CommentTimeJan 3rd 2019
    No, better to drill from the inside and inject from there with masonry construction, better still is to install batts properly as you go
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