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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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    • CommentAuthorArmchair
    • CommentTimeAug 13th 2007
    My terraced house has party walls made of chalk rubble - a sort of cob-type construction. I have recently had the place plastered in lime to allow the walls to breathe. A small portion of wall has been left exposed in the living room as a feature. I would like to seal this with a clear sealant to prevent dust coming off the wall but I'm struggling to find a suitable product to use. PVA would be ideal if it was breathable - are there any breathable alternatives out there?

    Thanks in advance for your help.
    • CommentAuthorbiffvernon
    • CommentTimeAug 13th 2007 edited
    If it's a small portion it's not going to really make much difference, but from the purist view it would be a shame to use pva. How about seeing if a few coats of linseed oil does the trick? Alternatively use wall paper paste or any other starchy glue such as watered down mashed potato or flour and water, or a protein based glue such as casein (aka skimmed milk) or rabbit skin size. All the above are eminantly breathable, but the potato and flour suggestions are the most likely to result in mould growth if it's damp. Have fun.
    • CommentAuthorRachel
    • CommentTimeAug 14th 2007
    Biff,I thought that linseed oil prevents the breathability?
    Try rabbit skin size. It's the key ingredient in many distempers, which are breathable, and should bind the surface enough to prevent dusting.
    • CommentAuthorbiffvernon
    • CommentTimeAug 14th 2007
    Posted By: RachelBiff,I thought that linseed oil prevents the breathability?

    No, it's very vapour permeable - But Gervase is probably right for a first choice.
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