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foam spray insulation for the attic

  • 18-11-2015 12:35am
    #1
    faolteam
    Registered Users, Registered Users 2 Posts: 1,826 ✭✭✭


    Spray foam insulation for the attic - thoughts?


    Anyone ever get the attic sprayed with foam insulation?

    If so, where you happy with the job, anyone recommended and did you notice an improvement in heat retention?


Comments

  • #2
    faolteam
    Registered Users, Registered Users 2 Posts: 1,826 ✭✭✭faolteam


    thanks


  • #3
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Don't bump threads, thanks


  • #4
    faolteam
    Registered Users, Registered Users 2 Posts: 1,826 ✭✭✭faolteam


    about that


  • #5
    Wegian
    Registered Users, Registered Users 2 Posts: 220 ✭✭Wegian


    Despite the fact that it is recommended I have been warned about the risks associated with Dry Rot over time with foam insulation as the timber will not be exposed to air. Thoughts?


  • #6
    Gumbo
    Moderators, Society & Culture Moderators Posts: 40,339 Mod ✭✭✭✭Gumbo


    Wegian wrote: »
    Despite the fact that it is recommended I have been warned about the risks associated with Dry Rot over time with foam insulation as the timber will not be exposed to air. Thoughts?

    I have been seriously looking into doing this for the attic portion of my extension when I get the funding to do my project.

    Most spray foam installers come in and spray the hell out of the voids. You still need to let the timber and the roof space breathe. There is one company that I have been looking at that harp on about the fact that they fit a breathable layer in between the joists/rafters first before spraying, thus leaving a 50mm gap to allow for the timber to breathe.

    https://www.facebook.com/cpifoam/photos/a.357425204331176.80617.138983776175321/950965104977180/?type=3&theater


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  • #7
    horse7
    Registered Users, Registered Users 2 Posts: 3,829 ✭✭✭horse7


    Has anyone had it done,im interested in the breathable with card type.


  • #8
    [Deleted User]
    Posts: 21,179 ✭✭✭✭ [Deleted User]


    I thought the foam these days was breathable ?


  • #9
    Jupiter21
    Registered Users, Registered Users 2 Posts: 1 ✭Jupiter21


    Dont do it.......
    I bought a house that had spray on foam insulation under the roof tiles. 15 years later I am about to spend a ridiculous amount of money to do a full roof replacement due to wet rot caused by the spray on foam.
    Unless there is a 50 mm gap between the foam and the under side of the felt or tiles you will get the same problem over time. The timber in the roof must have air to breathe.
    There are a lot of contractors out there who dont understand how this should be done. Try going after them in a few years not to mention 15 years time.
    I can share photos of the resultant damage if interested.


  • #10
    [Deleted User]
    Posts: 21,179 ✭✭✭✭ [Deleted User]


    But isn't there breathable foam these days ?


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