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?
Hampton crawl space encapsulation — local context
If your Hampton crawl space stays damp, encapsulation is the fix: we install a 12-mil wall and 20-mil floor vapor barrier, dimpled drainage matting, a dehumidifier, and a sump. Hampton sits on the coast, and the town's own planning shows why a sealed crawl space matters here. The Rockingham Planning Commission "Tides to Storms" vulnerability assessment for Hampton found 75% of the 100-year floodplain is sensitive to flooding at just 1.7 feet of sea-level rise, and flags rising groundwater as the sea rises. The Town's Floodplain Management Ordinance maps coastal high-hazard VE and AE zones per the 2021 Rockingham County Flood Insurance Study. A dirt or fieldstone crawl space is also a radon pathway: EPA places Rockingham County in Radon Zone 2 (moderate), and we can add sub-membrane depressurization. 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. Alex discussed what was to be done, using what materials, and how long it would take to complete. He answered our many questions, and when completed, Gerald, the lead on the project, provided a thorough explanation. I'd hire this company again in a New York minute.
Frequently asked questions
Does my Hampton crawl space need radon mitigation along with encapsulation?
It can. EPA places Rockingham County, which contains Hampton, in Radon Zone 2 (moderate potential, a predicted 2–4 pCi/L average), and a dirt or fieldstone crawl space is a direct entry path because radon moves up through the ground into cracks, joints, and gaps in the foundation. EPA recommends fixing your home at 4 pCi/L or higher. We can install a sub-membrane depressurization system under the new vapor barrier. Radon mitigation is a separate add-on, typically $1,950–$2,250.
Why does encapsulation matter for a coastal Hampton home?
Hampton is a low-lying coastal town with a high water table. The Rockingham Planning Commission's "Tides to Storms" assessment for Hampton found 75% of the 100-year floodplain is sensitive to flooding at just 1.7 feet of sea-level rise, and it specifically flags rising groundwater as the sea rises. A sealed crawl space, with a 12-mil wall and 20-mil floor vapor barrier, dehumidifier, and sump, keeps that ground moisture out instead of letting it sit under your floors.
Is Hampton in a FEMA flood zone?
Parts of it are. The Town of Hampton's Floodplain Management Ordinance designates Special Flood Hazard Areas as Zones A, AO, AE, and VE (VE being the coastal high-hazard zone) based on the Flood Insurance Study for Rockingham County, NH dated January 29, 2021. Check your specific address against the Town's flood maps, but a high-groundwater, flood-mapped setting is exactly why a fully encapsulated and sump-drained crawl space pays off in Hampton.
Crawl Space Encapsulation in nearby New England towns
More 603 services in Hampton
- Basement Waterproofing in Hampton, NH
- Basement Finishing in Hampton, NH
- Foundation Crack Repair in Hampton, NH
- Radon Mitigation in Hampton, NH