Crawl Space Radon Mitigation in Johnstown
Crawl spaces are mitigated with sub-membrane depressurization: a sealed plastic membrane laid over the soil and a fan drawing from beneath it. Ohio's standards set the membrane at 6 mil polyethylene or heavier where the crawl is used for storage, with 12-inch sealed overlaps and mechanical fastening to walls and piers. Split-levels and ranch additions often pair it with sub-slab suction under the basement or slab. Johnstown sits within our service area for Greater Columbus and Central Ohio, with same-week scheduling typical for routine jobs.
Typical pricing in Johnstown
$1,800-$3,500
Pricing varies by job specifics. Free phone or on-site quotes; fixed pricing once the technician has assessed the job.
Crawl Space Radon Mitigation in Johnstown: small Licking County village core with modest exurban growth pushing out from it foundations and Columbus-area geology
Crawl Space Radon Mitigation in Johnstown involves sub-membrane depressurization: a 20-mil polyethylene liner sealed to the crawl walls with an inline fan drawing soil gas from beneath, working on the crawl-space envelope where ground-source soil gas enters through bare earth. The service is the right scope for any crawl-space-foundation home testing above 4.0 pCi/L, in place of sub-slab depressurization which does not apply to crawl spaces.
Johnstown's older village houses sit on shallow stone or early poured foundations close to grade, while the newer homes built on the exurban lots around town in the last two decades rest on full poured basements. Licking County falls in EPA radon Zone 1, and the till-plain soils over shale bedrock common to this part of the county mean soil gas is present regardless of which foundation type a given house has. Johnstown sits on geology that drives elevated regional radon exposure across the Columbus metro, including Licking County.
Licking County crawl-space work is tied to the county's older rural stock away from the newer subdivisions built at village edges since the 1980s, where till-plain soils over shale keep ground moisture present regardless of foundation type, and a sealed membrane is standard before any suction system is added.
ANSI/AARST SGM-SF-2023, the standard for existing homes, calls for a sealed membrane and a system monitor, typically a manometer, showing continuous negative pressure beneath it. The Ohio Department of Health Radon Licensing Program oversees radon program compliance for Johnstown, and Ohio licensure under ORC 3723.02 applies to any contractor performing mitigation work in the state.
- County
- Licking, OH
- Geology
- Regional radon-bearing soils
- EPA action level
- 4.0 pCi/L on long-term average
- Service category
- Mitigation