Common questions about crawl spaces
- Can ‘dormant’ mold spores appear and affect a crawl space?
- Can I use plastic sheeting as a vapor barrier?
- Can you build a pole barn house with a crawl space?
- Crawl space is infested with mold, how do we go about properly fixing it?
- Does crawl space encapsulation increase home value?
- Does encapsulating a crawl space really work and is it worth the money?
Hingham crawl space encapsulation — local context
Hingham crawl spaces fight a high water table. The town wraps the tidal Weir River estuary, a state-designated Area of Critical Environmental Concern with extensive salt marsh draining into Hingham Bay (Weir River, Wikipedia, citing the Commonwealth of Massachusetts) — coastal ground that keeps soil damp against foundations. Hingham also sits in EPA Radon Zone 2 for Plymouth County, where indoor screening averages 2–4 pCi/L (U.S. EPA, Map of Radon Zones), and crawl spaces are a documented soil-gas entry path. Roughly 23% of Hingham housing predates 1940 (Town of Hingham Master Plan) — the older fieldstone-foundation homes we specialize in. Our encapsulation seals the space with a 12-mil wall / 20-mil floor vapor barrier, dimpled drainage matting, a dehumidifier, and a sump. Crawl space encapsulation runs $3,000–$25,000. Radon mitigation, if needed, is a separate add-on, typically $1,950–$2,250. See our crawl space services and radon mitigation.
What a recent customer said
Gerald and his crew did an excellent job, first cleaning out all the debris and the dislodged insulation in the crawlspace. they were very communicative and understood my concerns and handled them professionally. When they were finished laying the sublayment and the top vinyl covering, carefully taping all the seams they put insulating foam around the perimeter, sealing the top of the vinyl. Gerald communicated two issues that were not part of the contract that I will subsequently take care of myself. Great job, very satisfied.
Frequently asked questions
Is radon a concern for crawl spaces in Hingham, MA?
Yes. Hingham is in Plymouth County, which the U.S. EPA classifies as Radon Zone 2 — predicted indoor radon screening levels of 2–4 pCi/L, with EPA's action level at 4 pCi/L. Crawl spaces are a recognized soil-gas entry path, so encapsulation helps control moisture while reducing that pathway. Full radon mitigation is a separate add-on, typically $1,950–$2,250.
Why do Hingham crawl spaces stay so damp?
Hingham wraps the tidal Weir River estuary, a state-designated Area of Critical Environmental Concern with salt marsh draining into Hingham Bay. That coastal setting drives a high seasonal water table and damp soil against foundations — exactly the moisture load a sealed vapor barrier, dehumidifier, and sump are built to manage.
Do you handle older homes with fieldstone foundations in Hingham?
Yes — that's our specialty. The Town of Hingham Master Plan notes roughly 23% of housing units were built before 1940, many with fieldstone or older foundations and dirt crawl spaces. We encapsulate these with a 12-mil wall / 20-mil floor vapor barrier, dimpled drainage matting, a dehumidifier, and a sump. Encapsulation runs $3,000–$25,000.
Crawl Space Encapsulation in nearby New England towns
More 603 services in Hingham
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- Radon Mitigation in Hingham, MA