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?
Pelham crawl space encapsulation — local context
Pelham sits low in the Beaver Brook drainage. Nearly all of the town drains to that brook, which runs south to the Merrimack River at Lowell, Massachusetts (Wikipedia, citing NH GRANIT GIS), so groundwater and runoff collect toward crawl spaces here. The town was settled in 1722 and stayed a farming community until World War II (Town of Pelham, "About Pelham"), which leaves a lot of older homes with dirt or fieldstone crawl spaces, exactly what 603 works on. Pelham has 5,092 housing units at a $552,600 median value (U.S. Census ACS 2024 5-year). Encapsulation here is a 12-mil wall / 20-mil floor vapor barrier plus dimpled drainage matting, a dehumidifier, and a sump; crawl space encapsulation runs $3,000-$25,000. Pelham is in Hillsborough County, which the EPA maps as Radon Zone 2 (moderate). Because crawl spaces are a soil-gas entry path, radon mitigation is a separate add-on if a test calls for it, typically $1,950-$2,250. See our crawl space services or radon mitigation.
What a recent customer said
"Got 2 quotes to encapsulate a dirt floor under my breezeway between my garage and house. 603 explained exactly what they were going to do and the products they were going to use. Pricing was extremely reasonable compared to the other quote that I got. Job was done in a timely fashion. Crew was great. Would highly recommend 603 basement solutions any day." — Brian Dean, Google review
Frequently asked questions
Why do crawl spaces in Pelham, NH hold so much moisture?
Nearly all of Pelham drains to Beaver Brook, which flows south to the Merrimack River at Lowell, Massachusetts (Wikipedia, citing NH GRANIT GIS). The town also describes itself as having abundant bodies of water (Town of Pelham, "About Pelham"). Homes sit low in that drainage, so a high water table pushes moisture up through dirt and fieldstone crawl spaces. 603 encapsulates with a 12-mil wall / 20-mil floor vapor barrier, dimpled drainage matting, a dehumidifier, and a sump.
Does my Pelham crawl space need radon mitigation too?
Pelham is in Hillsborough County, which the EPA maps as Radon Zone 2, a moderate potential with a predicted average indoor screening level of 2 to 4 pCi/L (EPA, "New Hampshire Map of Radon Zones"). That is not the highest zone, but crawl spaces are a direct soil-gas entry path, so a test is still worth doing. If your level comes back high, radon mitigation is a separate add-on, typically $1,950-$2,250.
Are older Pelham homes more prone to crawl space problems?
Pelham was settled in 1722, incorporated in 1746, and stayed a farming community until World War II (Town of Pelham, "About Pelham"). A lot of that older housing predates modern foundation drainage and includes dirt-floor or fieldstone-era crawl spaces, the historic New England construction 603 specializes in. Encapsulation seals those spaces against the high water table the Beaver Brook drainage feeds.
Crawl Space Encapsulation in nearby New England towns
More 603 services in Pelham
- Basement Waterproofing in Pelham, NH
- Basement Finishing in Pelham, NH
- Foundation Crack Repair in Pelham, NH
- Radon Mitigation in Pelham, NH