Homes with a crawl space need a different approach than slab homes. The standard fix is sub-membrane depressurization — a sealed barrier over the soil with a fan drawing gas out from beneath it.
In a crawl space there's no slab to depressurize, so a durable plastic membrane is laid over the exposed soil and sealed at the seams and walls. A vent pipe pulls air from beneath that membrane and a fan pushes it outside, so soil gas is captured before it rises into the crawl space and up into the home. Done well, the same barrier also helps with ground moisture. Every crawl space is shaped differently, so the layout is fit to your home.

Serving Anchorage and nearby Eagle River, Wasilla, and Palmer. Other services: radon testing, sub-slab depressurization, crawl space mitigation, repair & fan replacement.
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