Loading this page…
A crawl space with bare soil
A sealed barrier over the soil and a small fan keep soil gas under the house instead of in it.
Cover the soil, then move the air
In a crawl space the soil is open to the air under the house, so radon can rise straight into the rooms above. The fix is to cover the soil with a heavy plastic barrier and pull air from under it.
We seal the barrier to the walls and piers, set a pipe under it and add a fan that vents the air outside. The result also helps keep the crawl space drier.
Good time to call if
- The house sits on a crawl space with bare soil
- A test on the main floor came back high
- The crawl space smells musty or feels damp
- There is old plastic that is torn or lifting
How the work goes
- 1Inspect the spaceWe check access, moisture and the condition of any plastic already there.
- 2Lay the barrierHeavy plastic over the soil, sealed to the walls and piers.
- 3Set the pipe and fanA pipe under the barrier and a fan that vents outside.
- 4Test againA follow-up test confirms the system is doing its job.
What the work includes
Vapor barrier
Heavy plastic over the soil, overlapped and sealed.
Suction pipe
A pipe under the barrier that carries soil gas out.
Fan and vent
A quiet fan and a vent above the roofline.
Sealing and test
Gaps closed and a follow-up test.
Questions about this job
Does the whole crawl space have to be covered?
Yes, bare soil is where the gas comes from, so we cover all of it.
Does it help with moisture?
A sealed barrier cuts moisture coming up from the soil, which is a good side effect.
Can I still get into the crawl space?
Yes. We leave access clear and show you how the system works.
Related radon work
Book the free estimate
Tell us about the house and whether it has a basement, slab or crawl space. We come out and send a written quote.
(319) 403-6594
Free estimate and a written quote