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Insulate Loft

Discussion in 'Floors, Stairs and Lofts' started by digitalquill, 27 Sep 2011.

  1. digitalquill

    digitalquill

    Joined:
    13 Sep 2010
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    Location:
    Hull
    Country:
    United Kingdom
    Hi all

    I am sure this has been covered before and from my research I think I am on the right lines but I have a specific question...

    I plan to insulate between the rafters in my loft, rafters are 6 inches deep so I thought I would put 100mm Kingspan between, leaving a 2 inch gap behind, I was then going to put some 50mm across the whole lot attached to the edge of the rafters as I have some 50mm left over and this will give some extra insulation value.

    My question is am I ok doing this, the roof does not have any lining/felt under the rosemary tiles. The kingspan will be foil backed so this will provide a vapour barrier? or do I need to put a breathable membrane across first?

    Any comments or thoughts welcome

    Matt Houldsworth
     
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