loft insulation in bedroom with flat top and pitched sides

Discussion in 'Floors, Stairs and Lofts' started by JOZ, 1 Feb 2009.

  1. JOZ

    JOZ

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    trying to find best way to retro-insulate a loft bedroom. I was told that if I insulate between rafters I must put a layer of insulating board on the ceiling before re-plasterboarding to stop the joist becoming a cold spot. ..this means removing all existing plasterbaord and insulating from inside. Completely different expert told me I should instead remove roof tiles and insulate from outside, but if I do that how can i deal with the cold-spot joist issue without still having to remove existing plasterboard ceilings?
    Outside or inside which is best? Also building control said if I couldn't get enough insulation in to comply with building regs, I could use less only if I reduced floor space of room by 5%!! anyone else come accross this?
     
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