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Dormer Insulation

  • 11-01-2014 10:53pm
    #1
    Mikejo
    Registered Users, Registered Users 2 Posts: 3 ✭


    Hi

    I live in a dormer bungalow, which is 8 years old. In the attic I can see fiberglass insulation between the rafters. Also in the eves I can see fiberglass between the rafters. I therefore presume all the roof is insulated like this.
    When I checked under the fiberglass today I noticed alot of condensation against the felt. Appreciate any advice on what I should do.


Comments

  • #2
    MicktheMan
    Registered Users, Registered Users 2 Posts: 2,880 ✭✭✭MicktheMan


    There needs to be a 50mm continuous ventilation channel between the roof felt and the top of the insulation. Do you have this?


  • #3
    Mikejo
    Registered Users, Registered Users 2 Posts: 3 ✭Mikejo


    Thaks for replying MicktheMan.
    I don't have a ventilation channel. The fiberglass/wool is pushed right against the felt. I presume I should have rigid insulation instead, which would facilitate the channel? I could take down the fiberglass and fit the rigid stuff. I have a small attic and can get at part of the rafters from here. Also I have access to the eaves from the upsatirs rooms so again I can get at another part of the rafters. However part of them are not visible i.e. Plasterbord over them - part of room ceiling. Not sure how I will be able to re-insulate this area.

    Have I anyother options?


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