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cold deck insulation board wool

  1. S

    Warm Flat Roof?

    Hi, hope I have posted in this in the right section of the forum.. i'm getting a loft conversion built - the builder has put 25mm of insulation above the joists and 120mm inbetween the joists in the flat roof. he's said this makes it a warm roof therefore it doesnt need any ventilation.. is...
    • Steve111222
    • Thread
    • cold deck insulation board wool flat roof roof warm deck
    • Replies: 11
    • Forum: Building
  2. D

    Cold Deck Insulation - Insulation Board vs Rolls

    Hi, We're cracking through our extension, I just need a little advice if that's ok. We have a 5x4m single story extension with a slightly pitched roof. I'm just wondering how to insulation it without it costing the earth with insulation board. We have EPDM, hardboard and 200mm rafters, making...
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