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which insulation for attic matress

  • 11-11-2008 10:42PM
    #1
    bakerbhoy
    Registered Users, Registered Users 2 Posts: 739 ✭✭✭


    Ceilings now slabbed with 50 mm insulated slabs skimming started.
    I am looking for opinions on which insulating substrate to use above , rockwool ,fibre glass ,cellulose ,sheepswool etc. I have a deck 600mm off the top of joists for storage, so not restricted for depth.


Comments

  • #2
    sinnerboy
    Closed Accounts Posts: 5,433 ✭✭✭sinnerboy


    Rockwool because
    1. relatively low embodied energy ( compared to fibre glass not cellulose / sheeps wool )
    2. can be compressed into awkward spaces avoiding air gaps - and is physically easier to do
    3. relatively good value ( compared cellulose / sheeps wool not to fibre glass not )
    4. use no more than 200mm - reason - top statas will get very cold otherwise and you will get condensation forming
    5. excellent fire resistant qualities


  • #3
    bakerbhoy
    Registered Users, Registered Users 2 Posts: 739 ✭✭✭bakerbhoy


    Don't the current regs say 400mm minimum:confused:


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