Crawlspaces
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Crawlspace covered with 12 mil white plastic and 1/4" concrete achors. Crawlspace prior to covering-radon level 15.5pCi/L and musty odor. Radon and odor gone with radon system. 12 mil plastic covering sealed to the walls and a vent line under the plastic.
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12 mil cover, excellent for storage and attractive appearance. 6 mil plastic sealed to the wall with radon vent line. Plastic covers are not recommended to walk on or store heavy objects.
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Vent line under 12 mil plastic. Sealed with concrete anchors to the walls. Numerous suction points from a large crawlspace covered with 6 mil plastic. 12 mil white cover with sump suction.
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Vent line with damper control into old crawlspace. Crawlspace and floor suction. 2 floor and 3 crawlspace suction points. Radon levels down to 0.8.
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damper to control air flow to the crawlspace required rubber coupling on vent line by ODH properly sized pipe to vent the crawlspace and floor

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