Google Rating
4.9
78 reviews

St Louis'
‍Health-focused
Crawlspace company

Eliminate mold & bacteria
Seal out the moisture
Ensure the crawlspace stays dry
Restore healthy air quality
everywhere

Call or text our owner Dave for help with your mold problem

(314) 916-6533

Request a call back

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As featured on

Is Your Crawlspace Causing Problems in Your Home?

We address crawlspace moisture at the source to help protect your home above.
01
Debris Removal & Prep
We remove contaminated insulation, debris, and rot to create a clean, sterile foundation for your home.
02
Medical-Grade Encapsulation
We install a heavy-duty reinforced liner that completely seals off your home from soil gases, pests, and groundwater.
03
Active Humidity Control
We install a commercial dehumidifier to maintain dry air, starving mold of the moisture it needs to survive.
04
Patented Dry Fog Sterilization
Finally, we treat the entire space with our non-toxic dry fog to eliminate 99.9% of remaining mold spores and bacteria.

1,000s of life-changing stories

Dave who owns and runs Claro is the most amazing person. I called him as I was struggling with sinus issues and migraines. He tested many areas in our house. He has helped us endlessly to resolve our problems. Thanks Dave for your kindness and intelligence and your care and concern. You are the BEST!!

Candace C

St. Louis, MO
I had a great experience with Claro St. Louis. Their team was professional, thorough, and explained everything clearly. I’m really grateful for the quality of their work and highly recommend them to anyone dealing with mold issues!

Monica A

St. Louis, MO
I can’t say enough good things about Claro! The team is patient, knowledgeable, and genuinely invested in helping me understand everything. They managed to come out the SAME day I called, completed air testing on the spot, and I had official independent lab results back within just a few days. Absolutely recommend!

Amy B

Kirkwood, MO
We’d noticed a faint mildew smell around the HVAC vents and weren’t sure if it was worth digging into. Dave at Claro told me about their “test first, treat only if needed” approach — no pressure, just honesty. They ran the air test, found elevated spores, then scheduled fog treatment. A few hours later we were done. The smell disappeared within a day!

Grant S

St. Charles, MO
The first of its kind here in town. So great to have a safe mold remediation option in STL. There is nothing better you can do for the health of your family than making sure your house is mold-free! They offer mold inspections and make it easy.

Margaret H

Brentwood, MO
Basement had damp patches after a rain leak last summer. We cleaned it up, but the air still felt stale with patches of visible mold. Called Claro. Dave came, tested the air, confirmed elevated spores, but said fogging only makes sense once the leak was fixed — which it was. They treated the house the next afternoon, re-tested — and everything was clean. No drama, no mess. Just a safe, fresh home.

Michael B

St. Louis, MO
I lean toward skepticism when I hear about "one-day mold fixes," but Claro proved me wrong. Dave was honest about what could and couldn't be done. They tested the air, confirmed there was an issue, then fogged the house in one afternoon. By the next day air tests were clear and the stale odor was history. House feels cleaner, fresher -- I sleep better now.

Joe P

St. Louis, MO
Dave who owns and runs Claro is the most amazing person. I called him as I was struggling with sinus issues and migraines. He tested many areas in our house. He has helped us endlessly to resolve our problems. Thanks Dave for your kindness and intelligence and your care and concern. You are the BEST!!

Candace C

St. Louis, MO
I had a great experience with Claro St. Louis. Their team was professional, thorough, and explained everything clearly. I’m really grateful for the quality of their work and highly recommend them to anyone dealing with mold issues!

Monica A

St. Louis, MO
I can’t say enough good things about Claro! The team is patient, knowledgeable, and genuinely invested in helping me understand everything. They managed to come out the SAME day I called, completed air testing on the spot, and I had official independent lab results back within just a few days. Absolutely recommend!

Amy B

Kirkwood, MO
We’d noticed a faint mildew smell around the HVAC vents and weren’t sure if it was worth digging into. Dave at Claro told me about their “test first, treat only if needed” approach — no pressure, just honesty. They ran the air test, found elevated spores, then scheduled fog treatment. A few hours later we were done. The smell disappeared within a day!

Grant S

St. Charles, MO
The first of its kind here in town. So great to have a safe mold remediation option in STL. There is nothing better you can do for the health of your family than making sure your house is mold-free! They offer mold inspections and make it easy.

Margaret H

Brentwood, MO
Basement had damp patches after a rain leak last summer. We cleaned it up, but the air still felt stale with patches of visible mold. Called Claro. Dave came, tested the air, confirmed elevated spores, but said fogging only makes sense once the leak was fixed — which it was. They treated the house the next afternoon, re-tested — and everything was clean. No drama, no mess. Just a safe, fresh home.

Michael B

St. Louis, MO
I lean toward skepticism when I hear about "one-day mold fixes," but Claro proved me wrong. Dave was honest about what could and couldn't be done. They tested the air, confirmed there was an issue, then fogged the house in one afternoon. By the next day air tests were clear and the stale odor was history. House feels cleaner, fresher -- I sleep better now.

Joe P

St. Louis, MO
Great customer care and service, when you call this company, you will be speaking to the owner. in today's world where there is no customer care any longer these guys rank a 10 out of 10. I cannot say enough about them. Highly recommended.

Bryan G

Franklin, TN
After the treatment, our family’s mold-related illnesses got better and air quality tests came back great!

Thomas D

Nashville, TN