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  • #30836
    Peter Bayer
    Participant

    I have an oak framed roof which I would prefer to leave exposed ,hence I am looking at
    over rafter insulation but as the rafters are somewhat banana shaped in both planes
    I need a solution that will accommodate this less than ideal base.The materials I have
    found so far are too rigid or require too great a thickness .Am I going to have to in effect construct a new roof structure over the top?
    Any suggestions?

    #34827
    Anonymous
    Inactive

    Hi
    on page 40 of green building magazine volume17/2 theres a article covering a similar problem , they used T&G wood fibreboard
    I think this might be the product

    http://www.natural-building.co.uk/ir.htm

    #34828
    Peter Bayer
    Participant

    Jim
    thanks I'll have a look when I get hold of a copy!
    Peter
    The exposed rafters are an aesthetic choice not an economy!I am trying to retain the
    period features and achieve modern performance ,what I hope to avoid is the soulless
    box inside an old building (plasterboard finishes etc)I know I'm making life difficult for
    myself but if the period housing stock of this country is to be brought up to scratch a way of reconciling these requirements will have to be found.

    #34829
    bill butcher
    Member

    I think you are right Peter.

    It is easier to replace the rafters to get a flat working surface and allows the installation of a continuous vapour barrier over the purlins.

    This gives choice for insulation methods.

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