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Flush eaves detail

  • 21-12-2013 12:39pm
    #1
    lownhard
    Registered Users, Registered Users 2 Posts: 167 ✭✭


    Planning a build. Do not want a soffit. Want a flush eaves detail.

    See this link for the detail the architect has designed and the questions I have...

    All help appreciated

    http://img560.imageshack.us/img560/1182/91j3.jpg


Comments

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


    Why not just cut the rafter shorter, bring the regular outside block leaf up another course.

    With that detail you are guaranteed to get cracking externally where the cement board meets block work.


  • #3
    dfader
    Registered Users, Registered Users 2 Posts: 120 ✭✭dfader


    Most wide cavities use double wall plates these days for cut roofs.


  • #4
    sydthebeat
    Subscribers Posts: 42,581 ✭✭✭✭sydthebeat


    dfader wrote: »
    Most wide cavities use double wall plates these days for cut roofs.

    Again, not needed when the rafter is cut short.


  • #5
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    any cavity closer?


  • #6
    lownhard
    Registered Users, Registered Users 2 Posts: 167 ✭✭lownhard


    BryanF wrote: »
    any cavity closer?

    No! But there should be. I have seen PIR board cut with expanding foam to seal. Is this a good detail?


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  • #7
    lownhard
    Registered Users, Registered Users 2 Posts: 167 ✭✭lownhard


    sydthebeat wrote: »
    Why not just cut the rafter shorter, bring the regular outside block leaf up another course.

    With that detail you are guaranteed to get cracking externally where the cement board meets block work.

    Seems to make a lot of sense. Thanks

    Would it make a difference if using a truss roof vs a cut roof?


  • #8
    lownhard
    Registered Users, Registered Users 2 Posts: 167 ✭✭lownhard


    In the image below the cavity is closed with PIR. Is that expanding foam of the plantinum bead coming through?

    Would there be a batten either side of the cavity to secure the insulation?

    What fills the gap between the PIR between the rafters and the cavity closer?

    http://imageshack.us/photo/my-images/202/gfj4.jpg/


  • #9
    fclauson
    Registered Users, Registered Users 2 Posts: 1,691 ✭✭✭fclauson


    lownhard wrote: »
    In the image below the cavity is closed with PIR. Is that expanding foam of the plantinum bead coming through?

    Would there be a batten either side of the cavity to secure the insulation?

    What fills the gap between the PIR between the rafters and the cavity closer?

    http://imageshack.us/photo/my-images/202/gfj4.jpg/[/QUOTE]
    that's MINE !!

    That's expanded foam to seal the cavity ready for bead to be pumped later

    No batten used to support PIR bit it probably was sitting on a wall tie in the top of the cavity

    Filling the gap - we stuffed this junction with rockwool to ensure good thermal protection

    On cutting short your eves - have you done a PHPP - you will need summer shading potentially and the best way of achieving this is to get the right level of overhang


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