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drainage & ventilation cavity question

  • 06-01-2017 3:32pm
    #1
    Corinne
    Registered Users, Registered Users 2 Posts: 13 ✭


    Hello,

    I'm wondering if anyone can shed any light on some discrepancies between different people I am talking with re: a new build house.

    The builder is putting in a two-storey bay window. He and one of the construction workers have given 2 different measurements for the drainage and ventilation cavity between the rib lath and plywood. Builder says its 25 mm but from seeing it ourselves and what a construction worker said its about 12 mm, and there is no vent from the cavity.

    The builder says he doesn't need to put in a vent because the cavity area is small (between the ground and first floor bay windows). So if isn't really a drainage and ventilation cavity, so what is the point of it? Does it have any purpose without a vent?

    If anyone could shed light on this it would be much appreciated!


Comments

  • #2
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Cavity should be vented.
    Otherwise things will rot

    Is there an architect checking these things on your behalf?


  • #3
    Corinne
    Registered Users, Registered Users 2 Posts: 13 ✭Corinne


    We had organised one to visit the house but he said he would not comment on anything to do with rot - so, we are looking for someone else who will actually comment as this is the main issue (feel free to PM any recommendations!)


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