York crawl space encapsulation — local context
York sits in York County, which the EPA's Map of Radon Zones — Maine places in Zone 1, the highest tier (predicted average indoor screening level above 4 pCi/L, the level at which EPA recommends a fix). That matters here: a dirt-floor or fieldstone crawl space is a direct soil-gas pathway. Per Maine's Radon Coordinator (reported by WGME), the statewide average is 4.3 pCi/L — already over EPA's 4 pCi/L action level and roughly triple the ~1.3 national average — and more than 50% of tested homes in southwestern Maine, which includes York, read elevated. York is also old: the Maine Historic Preservation Commission notes it was settled c.1630 and incorporated in 1652, the second-oldest town in Maine after Kittery, with much pre-1820 clapboard housing prone to crawl-space moisture. And it's coastal — on the Gulf of Maine, draining into the York River. Our crawl space encapsulation means a 12-mil wall / 20-mil floor vapor barrier, dimpled drainage matting, a dehumidifier and a sump — sealed seams, no exposed soil. Crawl space encapsulation runs $3,000–$25,000. Radon mitigation, if needed, is a separate add-on, typically $1,950–$2,250.
What a recent customer said
"After obtaining three estimates for crawl space encapsulation + sump pump installation, we (and our neighbors) landed on 603 Basement Solutions. They were, by far, the most professional and communicative during the estimation process — because we could not be present when the work was done, this was very important to us. Alex discussed what was to be done, using what materials, and how long it would take to complete. He answered our many questions. After signing on, the communication with Isabel at the home office was outstanding, from start to finish. All went as planned, and when completed, Gerald, the lead on the project, provided a thorough explanation. I'd hire this company again in a New York minute, although the work was done in Maine." — KARO, Google review
Frequently asked questions
Is radon a concern for crawl spaces in York, Maine?
Yes. York is in York County, which the EPA's Map of Radon Zones places in Zone 1 — its highest tier, meaning a predicted average indoor radon level above 4 pCi/L (EPA's action level). Maine's Radon Coordinator (via WGME) reports a statewide average of 4.3 pCi/L versus a national average near 1.3, and more than 50% of tested homes in southwestern Maine, which includes York, show elevated levels. An unsealed crawl-space floor is a direct soil-gas pathway, so we pair encapsulation with a sub-membrane radon system where needed — a separate add-on, typically $1,950–$2,250.
Why are York's older homes more prone to crawl-space moisture?
York is one of Maine's oldest towns. The Maine Historic Preservation Commission notes it was settled around 1630 and incorporated in 1652 — the second-oldest town in Maine after Kittery — with much of its housing stock built before 1820 (clapboard-sided, gable-roofed). Homes of that age often have fieldstone or unsealed crawl-space floors that predate modern moisture control, which is exactly what encapsulation addresses.
Does York's coastal location affect crawl-space humidity?
It can. Per Wikipedia's geography of York, the town sits on the Gulf of Maine with four sandy beaches and five villages — Bald Head, York Village, York Harbor, York Beach and Cape Neddick — and its land drains into the York River watershed. Coastal, low-lying ground near the water table tends to push humidity and moisture into crawl spaces, which a sealed 12-mil wall / 20-mil floor barrier plus a dehumidifier is built to control.