Radon Detection (Testing)
Short-term and long-term radon testing that tells you your actual indoor level, not a guess, so you know whether mitigation is even necessary.
See detailsAbout
About Capitol Radon
A locally owned radon detection and mitigation company working Des Moines and the rest of Polk County.
Quick quotes
Send us your details and we get back to you fast with a written quote.
Quick scheduling
We do not make you wait weeks for a test or an install date.
Locally owned
One shop, one service area, no franchise call center.
Built around one service area
PLACEHOLDER: the origin story. Who started the company, when, and why they stayed in Des Moines instead of chasing work out of the area. Two or three paragraphs, written like a person talking, not a brochure.
PLACEHOLDER: what the crew looks like today. Number of crews, how long the leads have been with the company, what kind of work fills the schedule — residential, GC work, property management.
How we quote and how we work
PLACEHOLDER: the process from first call to final walkthrough. Site visit, measurements, written scope, schedule, cleanup, follow-up.
How a mitigation system gets built
Four steps, in order, no shortcuts
Radon mitigation is a system, not a single fix. Each step depends on the one before it, which is why we test first and verify last instead of just installing a fan and calling it done.
STEP 01
Test and diagnose
A short-term or long-term test tells us your actual radon level, not a guess. We place the device, let it run the full recommended period, and read the result before recommending anything.
STEP 02
Design the system
If the test comes back at or above the EPA action level, we look at your foundation type, sump location and layout to design a sub-slab depressurization system that actually fits your house instead of a one-size-fits-all setup.
STEP 03
Install
The vent pipe, fan and sealing work go in, routed to be as unobtrusive as possible and finished so the discharge point meets code clearances from windows and grade.
STEP 04
Verify
A manometer confirms the system is pulling negative pressure under the slab, and a post-mitigation test confirms your indoor radon level actually dropped, not just that the fan is running.
What to expect
How working with Capitol Radon actually goes
A real written quote
Tell us about your home and you get a written quote back fast, not a number guessed over the phone or read off a photo.
A technician who explains the plan
Before anything gets installed, you will know why the system is laid out the way it is for your specific foundation, not a generic setup.
A result you can verify
We do not just tell you the fan is running. A post-mitigation test confirms your actual indoor radon level came down.
Services
Radon work we take on in Des Moines
Everything from a same-day test to a full sub-slab mitigation system on new construction. If it involves radon, it is what we do all day.
Radon Detection Device Installation
A permanently installed continuous radon monitor that tracks your indoor air over time, instead of a single snapshot reading.
See detailsQuick Quotes
Send us a few details about your home and get a written quote back fast, whether you need a test, a full mitigation system, or just want to know what it would cost.
See detailsRadon Mitigation System Installation
A full radon mitigation system, typically sub-slab depressurization, designed and installed to bring your indoor level back under the EPA action level.
See detailsSub-Slab Depressurization
The standard radon mitigation method for basement and slab-on-grade homes: a fan-driven system that pulls soil gas from under the foundation before it enters the house.
See detailsCrawl Space Radon Mitigation
A vapor barrier and sub-membrane depressurization system designed specifically for homes with a crawl space instead of a full basement.
See detailsRadon System Repair & Maintenance
Fan replacement, pipe repair, and system checks for an existing radon mitigation system, whether we installed it or someone else did.
See detailsPost-Mitigation Radon Testing
A follow-up test after mitigation system installation that confirms your actual indoor radon level dropped, not just that the fan is running.
See detailsReal Estate / Home Sale Radon Testing
Radon testing built around real estate timelines, for buyers who want to know before closing and sellers who want the number ahead of listing.
See detailsNew Construction Radon-Resistant System Installation
A passive radon-resistant system installed before the slab pour on new construction, far easier and less expensive than adding one after the home is finished.
See detailsCommercial Radon Mitigation & Testing
Radon testing and mitigation for offices, schools, retail space and multi-tenant buildings, where HVAC systems and multiple zones make the job more involved than a single-family home.
See detailsGet a straight answer on your wall
Free on-site estimates across Des Moines and Polk County. We look at the actual wall, measure the elevations and send a written scope — no charge and no sales pitch.