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Insulation question

  • 26-08-2011 8:29pm
    #1
    toshy321
    Registered Users Posts: 163 ✭✭


    Built on sunroom just wondering what I should insulate in between rafters with there is no ceiling joists just collar ties putting t and g timber ceiling on it. What should I insulate between the rafters with guessing 50-100mm kingspan 8x4 sheets, any info would be great.


Comments

  • #2
    TopTec
    Registered Users, Registered Users 2 Posts: 1,167 ✭✭✭TopTec


    Yep, Kingspan or equivalent, as thick as your rafters allow leaving a small vent space between the back of the sheet and your actual roof surface.

    TT


  • #3
    slimjimmc
    Registered Users, Registered Users 2 Posts: 7,786 ✭✭✭slimjimmc


    I think the small vent space is supposed to be at least 50mm.


  • #4
    TopTec
    Registered Users, Registered Users 2 Posts: 1,167 ✭✭✭TopTec


    slimjimmc wrote: »
    I think the small vent space is supposed to be at least 50mm.

    Not necessary in a sunroom. Main roof yes.

    TT


  • #5
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,140 Mod ✭✭✭✭BryanF


    toshy321 wrote: »
    Built on sunroom just wondering what I should insulate in between rafters with there is no ceiling joists just collar ties putting t and g timber ceiling on it. What should I insulate between the rafters with guessing 50-100mm kingspan 8x4 sheets, any info would be great.
    http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,27316,en.pdf


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