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  1. #1
    A. Seth Teicher's Avatar
    A. Seth Teicher Guest

    Default Crawlspace ventilation

    I have a 16 x 30 addition with a filled block insulated foundation. The crawlspace has no vents on the exterior walls and a good vapor barrier, and in 7 years I've had no moisture problems. There are 2 large openings, into the basement, on the interior wall for ventilation. We recently had a mouse infestation, with some of them apparently coming in through the openings. I've purchased a Tjernlund VD2 for one of the openings, and will screen the other. Is this an acceptable way to ventilate the crawlspace?

    Thanks

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  2. #2
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
    Posts
    5,005

    Default Re: Crawlspace ventilation

    Why not just cover each opening with screens on wood frames?
    You have passive ventilation currently and you have no problems with moisture so why do you feel you need a power vent?

    Find any exterior holes and pack them with steel wool and caulk over. Mice do not eat through steel wool.


  3. #3
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,478

    Default Re: Crawlspace ventilation

    Quote Originally Posted by A. Seth Teicher View Post
    I have a 16 x 30 addition with a filled block insulated foundation. The crawlspace has no vents on the exterior walls and a good vapor barrier, and in 7 years I've had no moisture problems. There are 2 large openings, into the basement, on the interior wall for ventilation. We recently had a mouse infestation, with some of them apparently coming in through the openings. I've purchased a Tjernlund VD2 for one of the openings, and will screen the other. Is this an acceptable way to ventilate the crawlspace? Thanks
    Seems to me with only one vent opening and a fan, either the crawlspace will be experience positive pressure (pushing air from the crawl into the house) or negative pressure (pulling air from the house into the crawl). Neither sounds good.

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