Homes with dirt or gravel crawl spaces need a different approach: a heavy membrane sealed over the exposed ground, with suction drawn from beneath it. Without the membrane there is nothing to pressurize against — the fan would just pull room air.
Reasons to schedule this service
This service may be the right fit when one of these situations sounds familiar:
- part of the home sits over a crawl space
- testing shows elevated radon
- crawl-space air connects to living areas
What matters for Des Moines properties
Older Des Moines neighborhoods are full of houses where a basement meets a crawl-space section under an addition or porch, and those hybrids are where radon jobs get designed badly. Both zones usually need to tie into one fan, and the crawl membrane's seams and edge sealing determine whether the whole system works.
What affects the estimate
- crawl height
- soil exposure
- vapor barrier
- moisture
- access
How the work usually goes
Crawl-space work has its own order:
- Test Result Review: Review the radon test result, test date, foundation layout, basement use, and any real-estate deadline.
- Foundation And Sump Check: Check slab areas, sump pits, drain tile, crawl spaces, pipe routes, fan locations, and discharge options.
- System Design Planning: Plan the mitigation system, sealing details, electrical needs, fan placement, and retest timing.
- Pipe Fan And Sealing Work: Install or repair the pipe, fan, suction point, sump cover, crawl-space barrier, or sealing work.
- Retest And Maintenance Guidance: Review manometer readings, labels, maintenance notes, and when the home should be tested again.
