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Does anyone have experience ventillating a flat roof through the inside face of the parapet?

Jennifer Reilly| Posted inGeneral Questionson

I have a flat roof assembly that consists of a green roof on top of TPO, on plywood that spans sleepers (for slope) filled in with rigid insul, followed by structural sheathing, cellulose insulation and TJI’s @ 16″ oc. I’m holding a 1″ air space above the rigid for ventilation, but I’m not quite sure how the ventillation at the parapet will work to maintain a weather seal and adequate ventillation. Cor-a-vent makes a strip vent that I’m thinking of using. Does anyone have information on this flat roof venting?
Thanks!
Jennifer

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  1. GBA Editor
    Martin Holladay||#1

    Jennifer,
    I have no experience in venting a flat roof with a parapet. But here is an online discussion on the topic:
    http://forums.jlconline.com/forums/showthread.php?t=46211

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