Your radon test came back at or above 4 pCi/L. Now you want the problem fixed, and you want to know how much of your week it will take.
The question we hear most is simple: how long does radon mitigation take? In Columbus and across Central Ohio, the answer is shorter than most homeowners expect. Most crews finish the installation in a single day.
This guide walks through the full timeline, from your first quote to your retest. It also covers what can add time to a job.
The Short Answer: Most Radon Mitigation Installs Take One Day
Ohio Radon Control completes most residential installs in a single day. A typical job runs four to six hours, depending on the number of suction points and the pipe route.
Multi-day installs are rare. They usually involve larger commercial systems or extensive crawlspace work.
The install is only one step in the project. A full timeline also includes a quote, a home assessment, and a post-installation test.
How Soon to Retest After Installation
The EPA sets the testing window for a radon system. Test within 30 days of installation, but wait at least 24 hours after the fan starts running.
The EPA recommends a two to seven day measurement to check the system’s effectiveness. Its Consumer’s Guide to Radon Reduction also says a contract should state the time needed for the work.
What Can Add Time to a Radon Mitigation Job
Most Columbus homes follow the one-day pattern. A few features can stretch the schedule.
More Than One Suction Point
Larger and split-level homes often need two or three suction points to pull the whole footprint below 4.0 pCi/L. The number of suction points affects how long the job runs.
Franklin County’s bedrock and soil vary between neighborhoods, which is why Columbus has high radon levels in the first place. Two homes on the same street can need different setups.
Vent Pipe Routing
Finished space adds work to pipe routing. There, the crew may box in the pipe, paint it to match, or route it through a closet.
Sealing Sump Pits, Drains, and Cracks
Sump pits, floor drains, and slab cracks all need sealing so the system holds suction. Older Columbus homes with settled or cracked foundations sometimes need extra sealing, which adds labor time.
Crawlspaces
The EPA calls submembrane suction the most effective method for crawlspace homes when applied properly. This method covers the dirt floor with a plastic sheet. A vent pipe and fan then pull radon from beneath it.
A crawlspace with exposed dirt usually needs a vapor barrier at minimum, and some need full encapsulation. Extensive crawlspace work can run longer than one day. Our crawlspace encapsulation service covers the details.
Radon Mitigation Timing During a Home Sale
When a sale turns up a high radon test, the EPA says the buyer and seller should discuss timing and costs. That advice comes from the EPA’s Home Buyer’s and Seller’s Guide to Radon.
The EPA recommends that sellers test before listing and lower radon levels if needed. It says fixing a problem before listing gives you more time to address it.
Buyers can also put timing in the contract. The EPA suggests provisions that state when radon mitigation measures will take place and who will pay for them.
If a sale turns up a high radon test, contact Ohio Radon Control at (614) 560-0297. Share your closing date and ask for the expected timeline for your home.
Frequently Asked Questions
Most residential installs take one day, usually four to six hours. Extra suction points, finished-space pipe routes, and extensive crawlspace work can add time.
The EPA says to wait at least 24 hours after the fan starts running. Test within 30 days of installation. Keep windows and doors closed for 12 hours before and during the test, except for normal entry and exit.
It can. A crawlspace with exposed dirt usually needs a vapor barrier at minimum. Extensive crawlspace work can run past one day.
Multi-day installs are rare. They usually involve larger commercial systems or extensive crawlspace work.
Yes. The EPA lists the time needed to complete the work among the items a mitigation contract should include. Ask your contractor to put the timeline in writing.
Schedule Your Radon Mitigation in Columbus
Most residential installs take about one day. The next step is a quote for your own home.
Call Ohio Radon Control at (614) 560-0297, or request a free quote. Ask for the expected timeline for your home when you call. Our working hours are Monday through Friday, 9:00 am to 6:00 pm.
Ohio Radon Control is based in Marysville and installs throughout Columbus and Central Ohio, including these communities: Dublin, Hilliard, Westerville, Gahanna, Upper Arlington.
Learn more about our radon mitigation services. If you have not tested yet, schedule a radon test first.
