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Covering cabin crawlspace for winter

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Posted by: from Winnipeg
10/11/2018 at 10:53:46 AM

We have poured the foundation for our cabin and used ICF's for our crawlspace walls. We have sheeted the floor with plywood. We are were planning on continuing the project next spring. Would covering the crawlspace with a tarp be sufficient? We are worried about mold. Do we need to use a dehumidifier or a fan to keep it dry?

REPLIES (3)
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Date/Time10/11/2018 at 3:10:35 PM

If the entire floor is sheeted I would visit the site often over the winter and snowblow or shovel all snow off of your floor. If it's an osb floor it could easily be damaged by water. Framing something up over winter is best if possible.

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Date/Time10/12/2018 at 10:14:03 AM

You should have an air vent at opposite ends of your crawl space, without continuous air flow you could get mold. If you're leaving your floor for the winter I would recommend framing a little wall up in the middle 5 feet tall or so and then tarp it off so it has a pitch. Used to by force attached to that knee wall to strengthen the tarp.

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Date/Time10/12/2018 at 1:02:48 PM

Venting with two grills on opposite sides is necessary now and in future.

If you puncture and throw several bags of mothballs in the crawl space, it will discourage animals from nesting there.

I find that most tarps are not waterproof.

Two layers of 6 mm poly would be best. Use the red Tuck tape on the joints and tape it very well, leave flat. Painting the plywood will help seal it.

Best,

Andrew Parker

Par-Tek Design Build Ltd.

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