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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.

Buy individually or both books together. Delivery is free!


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    • CommentAuthorjules
    • CommentTimeMar 4th 2008
     
    We have moved into a converted barn/stable which is about 100 years old, and which appears to have a cavity wall. The brick walls are over 30cm thick, and have sets of air bricks along the bottom (above the DPC) and above the windows on the ground floor. A stick inserted into the airbrick hits a solid surface at about 17cm.

    We are about to do the place up, and I'm thinking about insulation. For one room in particular, which is exposed on 3 sides (7m, 5m, 7m), internal insulation would be feasible, but I was wondering about filling the cavity with polystyrene beads. I believe that using PS beads should avoid problems with rainwater crossing the cavity, but I am wondering about cold spots inside, as presumably the inner and outer walls will be tied at regular intervals. Above this room is the roof, containing bedrooms. The house is large and appears dry (probably because it's not at all airtight!).

    What do people think?

    Jules

    PS external insulation is a non-starter ("traditional" building in an AONB)
    • CommentAuthorchuckey
    • CommentTimeMar 4th 2008
     
    I insulated a victorian cavity walled nouse with beads about 20 years ago. Very satisfied. Points to look out for :- They don't use enough "glue" so beads will appear and fall out of any holes in the mortar (around waste pipes etc). For the same reason, in one corner of my loft, beads seem to be sucked out of the cavity. the lads did seal the top of the cavity, but not very well in this corner. I fixed it my self with beads bought from sheffield insulation and some glass fibre stuffed in on top of them. Also in my case the relatively large holes in the brickwork (1" diam?) were patched up very well with mortar that was dyed to exactly the right colour.
    Frank
    • CommentAuthortony
    • CommentTimeMar 5th 2008
     
    Yes, go ahead and fill.
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