Commercial Mold Remediation Company in Saint Louis, MO

Mold growing behind your walls, above your ceilings, or in your ducts ends up in the air your team breathes. We remove it, treat the whole space including the air, and an accredited third-party lab confirms the results. Every job carries a 1-year mold-free guarantee.

Clayton, MO

Ladue, MO

Frontenac, MO

Chesterfield, MO

Creve Coeur, MO

Kirkwood, MO

Webster Groves, MO

Ballwin, MO

Manchester, MO

Wildwood, MO

and surrounding areas

(314) 916-6533

Why Commercial Mold Is So Common In St. Louis

Most commercial mold stays out of sight. It colonizes the paper backing on drywall, the tops of ceiling tiles, and the inside of duct runs, releasing spores the whole time. Nobody sees anything. What people notice is how they feel: congestion that never quite clears, itchy eyes at their desk, a cough that follows them home. By the time someone connects it to the building, the exposure has been going on for months.

St. Louis gives mold plenty to work with. The metro sees around 42 inches of precipitation a year, with the heaviest stretch in spring when thunderstorms roll through, and summers stay muggy for weeks at a time. Sitting at the confluence of the Mississippi and Missouri rivers, the area knows what water damage looks like. Winter adds a quieter problem: freeze-thaw cycles crack mortar and foundations in the city's older brick building stock, letting moisture seep in long after the storm is over.

Once mold takes hold in an occupied building, the HVAC system does the distributing. Spores from a damp mechanical room or a wet basement reach every floor on the system. That's why we inspect & test before we touch anything, treat the whole space including the air, and send post-treatment samples to an accredited lab. Your team's health deserves better than a guess.

Our Commercial mold Removal Process in St. Louis

Inspection And Testing

Every job starts with a full walkthrough of the building. We find the moisture that fed the problem and map every area the contamination has reached. Air and surface samples go to an accredited lab, so the plan we hand you is built on results, not assumptions.

Source Repair And Material Removal

A leaking roof, a cracked foundation, a sweating condensate line. We stop the water first, working with your contractor where needed, then remove the materials too far gone to save. Skip this step and the mold is back within months, so we don't skip it.

Dry Fog Treatment

Once removal is done, our non-toxic dry fog fills the building, including the ductwork and the air itself, and neutralizes the spores removal can't reach. Fogging often takes as little as one day, and it leaves nothing behind on equipment, furniture, or finishes.

Clearance Testing

After treatment we test again, and an independent lab has the final word. You get a clearance report you can put in front of tenants, staff, insurers, or inspectors without explanation.

Who we help

Every commercial building has its own mold story. These are the calls we get most from St. Louis businesses.

Employee Health Complaints

A staff member keeps getting sick, an inspector raised a flag, or a renovation exposed what was hiding in the walls. We contain the affected area, fix the problem, and hand you lab-verified proof it's resolved.

Medical and Dental Offices

Patients with compromised immune systems can't share a building with mold or with harsh chemicals. We treat after hours and on weekends, so appointments stay on the books and the practice stays open.

Large Venues and Event Spaces

Arenas, theaters, and convention halls are too big for wiping down surfaces by hand. We stop the water at its source and fog the entire volume of the space, seats to rafters.

Restaurants

Kitchens generate constant moisture, and walk-ins and refrigeration lines collect condensation year-round. We schedule around your service hours and keep every step of the treatment clear of food storage.

Gyms, Studios, and Wellness Centers

Locker rooms, showers, and sweat-heavy air keep humidity high all year. We treat the space and set up routine air-quality testing, so your members never have a reason to wonder.

Offices and Coworking Spaces

A musty smell or a stained ceiling tile turns into a tenant complaint fast. We handle individual suites and shared HVAC systems without sending anyone home.

Why Choose Claro For Commercial Mold Remediation In St. Louis?

St. Louis has no shortage of remediation companies. A team that keeps your doors open, protects the people inside, and leaves you with proof the job was done right is harder to find.
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That is the standard we hold every job to.

Health-Focused Approach

Our dry fog is non-toxic and our process starts with testing, not chemicals. The people in your building, employees, patients, customers, are never exposed to anything harsh, during treatment or after.

Real Commercial Experience

Restaurant kitchens, medical offices, arenas, warehouses. Each one comes with its own inspection schedule, lease obligations, and tolerance for downtime, and we plan the job around all three.

Documentation You Can Share

When we leave, you get more than a clean building. You get independent lab results and a clearance report you can show to tenants, staff, inspectors, or your insurer.

Minimal Disruption To Operations

Dry fog and targeted removal skip the demolition marathon entirely. Nights, weekends, off-hours: we work when your building is empty so your team never has to stop.

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