How Long Does Radon Mitigation Take, and What Happens on Install Day?

Most installations are finished in one visit. This guide separates time on the job from the quote visit, the wait for an installation date, and the follow-up afterward.

From First Call to Scheduled Install

Bill first visits the home to explain the plan and give you the price. New-system installation is usually scheduled within a week or two; we confirm availability with you. That calendar wait is separate from the time the installation itself takes.

If you are working toward a closing deadline, say so when you call. We can confirm whether we can meet the date before you commit, and we will work around it if we can.

What Happens on Install Day

Most residential installs take two to four hours. The timeline varies by foundation type and how the pipe needs to be routed, but a straightforward job on a slab-foundation home is often done in under three hours.

Here is the general sequence:

• A quick assessment of the slab and foundation before drilling
• One or more suction points drilled through the slab
• PVC pipe run from the suction point through the home and to the exterior
• Fan mounted and connected to the pipe
• Visible slab cracks and gaps sealed
• Manometer installed and baseline reading confirmed

Before leaving, the crew walks you through how to check the manometer and what normal operation looks like. There is not much to it. The reading should stay consistent, and if it changes noticeably, that is the signal to call.

How Quickly It Works

The system starts working as soon as the fan is on. Radon levels in the living space typically drop within 24 to 48 hours.

If post-mitigation documentation is required for a real estate transaction, the test starts after the system has run at least 24 hours, and EPA says it should be done within 30 days of the install. EPA recommends a two to seven day measurement. Your contractor can coordinate the timing with whoever is handling the testing.

What to Have Ready

Not much preparation is needed on your end. If there is storage or shelving directly against the planned pipe route, moving it beforehand speeds things up. Otherwise the crew handles the rest.

Make sure someone is home for the install. The crew will need access to the basement and attic or exterior wall depending on the route.

For Buyers and Sellers

Radon mitigation comes up often in real estate transactions, and the timing question matters more in that context. If you are buying and need a system installed before closing, call as early in the process as possible. Getting on the schedule early leaves more flexibility if something shifts.

More on the real estate side: buying or selling a home with elevated radon.