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- 1). Cover the ground of your crawlspace with the vapor barrier, which can 6 mil plastic sheeting. Bring the edges of the sheeting up over the concrete block in the crawlspace.
- 2). Overlap the seams of additional pieces of plastic sheeting you need to use to cover the whole crawl space floor.
- 3). Attach the seams with waterproof tape to hold the vapor barrier together.
- 4). Connect the vapor barrier to the concrete block using concrete nails.
- 5). Pound stakes into the ground right over the plastic sheet every few feet to hold it in place and create holes where moisture can drain.
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