Radon Mitigation in Brentwood, MO

Radon mitigation in Brentwood, MO fixes a home that tested at or above the EPA action level of 4.0 pCi/L. Air Sense Environmental installs sub-slab and sub-membrane depressurization systems across St. Louis County, routes the fan outside the living space, and retests to confirm the number came down.

Does a Brentwood home need radon mitigation?

Mitigation follows measurement. If a Brentwood home tests at or above 4.0 pCi/L the EPA recommends a system, and readings between 2 and 4 pCi/L are worth discussing. St. Louis County is in EPA Radon Zone 2, where the predicted average indoor radon level is 2 to 4 pCi/L, and individual Brentwood homes routinely test well above the 4.0 pCi/L action level. Missouri’s Department of Health and Senior Services reports that roughly one in three homes tested through its statewide program between 2003 and 2023 came back at or above 4.0 pCi/L.

Brentwood is an inner-ring St. Louis County suburb of 1920s to 1950s brick homes on small lots, nearly all with basements that have had decades to develop cracks and open floor drains. If the home has not been tested yet, start with the St. Louis radon testing page.

Which radon mitigation system fits a Brentwood home?

The system follows the foundation:

• Basement slab: sub-slab depressurization, the most common system in Brentwood
• Crawl space: sub-membrane depressurization under a sealed vapor barrier
• Sump pit: a sealed sump lid tied into the system, covered in the sump pump radon mitigation guide
• Slab-on-grade: a suction point routed through a garage, closet or exterior wall
• Mixed foundations: multiple suction points balanced on one fan

The Brentwood homes Air Sense Environmental mitigates most often:

• 1920s to 1950s brick homes with full basements
• Homes with finished basements used as offices or bedrooms
• Tear-down rebuilds on poured foundations, which still need a baseline test
• Condominiums and townhomes with ground-level units

How is a radon mitigation system installed in Brentwood?

1. Assessment and diagnostics. The foundation, sump, cracks and pipe route are checked during a free in-home estimate.
2. Suction point. A core hole through the slab, or a sealed membrane in a crawl space, gives the fan something to pull from.
3. Pipe and fan. PVC pipe runs to a fan mounted outside the living space, in the attic, garage or on an exterior wall, and vents above the roofline.
4. Sealing. Cracks, the sump lid and other openings are sealed so the fan can hold suction.
5. Manometer and verification. A U-tube manometer shows the system is running, and a post-mitigation test proves the result.

Most Brentwood installations are completed in a single day. The full walk-through is on the radon mitigation system installation page.

How much does radon mitigation cost in Brentwood, MO?

Air Sense Environmental quotes each Brentwood job after seeing the foundation, because suction points and fan size drive the cost. For current ranges by system type, see the St. Louis radon mitigation cost guide.

How do you know the radon mitigation system worked?

A post-mitigation radon test is the only proof. Air Sense Environmental includes it, designs Brentwood systems to a target well below the 4.0 pCi/L action level, and recommends retesting every two years. When a fan eventually wears out, radon fan replacement restores the system.

Brentwood neighborhoods and nearby communities

Air Sense Environmental works across Brentwood, MO, including the Brentwood Boulevard corridor and the neighborhoods around Brentwood Park, in ZIP code 63144. Nearby communities with their own service pages:

• Radon mitigation and testing in Maplewood, MO
• Radon mitigation and testing in Richmond Heights, MO
• Radon mitigation and testing in Rock Hill, MO
• Radon mitigation and testing in Clayton, MO
• All Air Sense Environmental service areas