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To counter batten or not?

  • 19-10-2012 9:10am
    #1
    Rushy Fields
    Registered Users, Registered Users 2 Posts: 224 ✭✭


    Anyone have opinions?
    I am ready to felt and batten the roof in my new build but unsure if there any real advantages in doing so? Advice/help/past experience required to make the decision.


Comments

  • #2
    sydthebeat
    Subscribers Posts: 42,581 ✭✭✭✭sydthebeat


    warm roof or cold roof construction?


  • #3
    Rushy Fields
    Registered Users, Registered Users 2 Posts: 224 ✭✭Rushy Fields


    Its a small attic and will never be changed to rooms therefore it will only be used for storage.
    The front elevation is a story and a half and the rear is a full two storey if that helps.
    Considering spray foam between the rafters but but concerned about moisture/ventilation.
    Maybe just go with insulated slab on the underside of the ceiling joists and then 400mm of fiberglass insulation between and on top of the joists.


  • #4
    olympicweights
    Registered Users, Registered Users 2 Posts: 198 ✭✭olympicweights


    nealger wrote: »
    Its a small attic and will never be changed to rooms therefore it will only be used for storage.
    The front elevation is a story and a half and the rear is a full two storey if that helps.
    Considering spray foam between the rafters but but concerned about moisture/ventilation.
    Maybe just go with insulated slab on the underside of the ceiling joists and then 400mm of fiberglass insulation between and on top of the joists.

    If you have a story and a half to the front you would be best using a breathable membrane and counterbatten. This will keep the ventilation above the membrane, allowing you to use full fill insulation between your rafters. Otherwise you will lose 50mm of this space to ventilate the roof and possibly invite air into the house. Look at the possibility of using cellulose between the rafters, great for heat retention and reducing external noise, rain/traffic etc..


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