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Community and Q&A

Should I use Cor-A-Vent?

Roy Brohaugh | Posted in Green Building Techniques on

I’m using wood siding and rainscreen vent over closed cell spray foam/OSB/felt/3/4″ furring. Cor-A-Vent seems quick and easy but expensive. I haven’t seen any similar alternatives. Insect screen alone seems labor intensive and not very durable.

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Replies

  1. Expert Member
    Dana Dorsett | | #1

    The spun polypropylene (?)roll mesh used in ridge vents works great for rainscreens too, eg:

    http://www.deerso.com/product/d13345/cobra-rolled-ridge-vent?gclid=CLf5-ZGr-7kCFcZ9Ogod9AsA7g

    http://www.amazon.com/Flex-vent-Ridge-Vent-Material/dp/B0099XFIVA/ref=pd_sim_sbs_hi_4

    The 9-12" stuff you can cut down to 4-6" width. Most of it is 3/4" or so thick, and springy enough that you won't have big gaps with 1x furring.

  2. Expert Member
    Malcolm Taylor | | #2

    Roy, Here on B.C.s coast where rainscreen is mandated insect screen has been supplanted by U shaped perforated flashing. Most lumberyards here stock it but any sheet metal supplier or builder with a break could bend some up for you.

  3. Roy Brohaugh | | #3

    Thanks for the input Dana and Malcolm. What is the size and spacing of the perforations in the flashing, Malcolm?

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