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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Building Regulations and Standards: Fire resistance of Cob

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    Hello
    I'm having trouble with my local London council regarding using cob bricks and buildings regulations. Because its not on their list of approved materials they are saying that I have to prove that it is sufficiently fire resistant for up to 1 hour.
    I have used the term incombustible and even shown them pictures of cob ovens but they still insist on proof. Has anyone come across this before and is there any proof/tests that you are aware of?

    They are happy for me to use concrete or bricks instead, which, I find astonishing in an age of increasing awareness about lessening our carbon footprint. How can a one government body be so clueless about cob compared to say the Devon councils?

    I would be most grateful if you have any thoughts on the subject

    Regards
    Sasha
    • CommentAuthorjoe.e
    • CommentTimeMay 20th 2008
     
    Is it possible to make contact with a friendly building control officer in Devon? In my experience council officials are very open to their counterparts elsewhere. There may be some documentation available in Devon that they could forward.
    Or, you could just go at one with a blowtorch in their car-park...
    • CommentAuthorbiffvernon
    • CommentTimeMay 20th 2008
     
    Or, less sensibly I suppose, you could name and shame the local London council that is so ignorant of a wonderful building material. I might give someone a laugh.

    You might explain that the cob is the same as brick - or will be after a decent fire has been raging.
  4.  
    Have you considered using a private inspector? You do not have to use Local Authority Building Control
    • CommentAuthorMike George
    • CommentTimeMay 20th 2008 edited
     
    • CommentAuthorRachel
    • CommentTimeMay 21st 2008
     
    Amazonails have successfully fire tested clay plastered straw bales and proved their low combustability.. you could get their results to show the council just to make a point?
    www.amazonails.co.uk

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