Air sealing of the crawlspace ground is considered a “passive” method of controlling soil gasses, and should be done in advance of Radon testing.
Air sealing is a difficult proposition in a crawlspace. Standard plastic and tape are generally not enough due to the inherent flaws of plastic and tape systems. The Nu-Crawl System can be used under the guidance of licensed Radon mitigation provider or simply as part of a passive system.
· Nu-Crawl liners are seamless and durable.
· Concrete is porous and does not stop soil gases.
· Plastic and tape systems are easily compromised.