Expert Crawlspace Mold Removal in Saint Louis, MO

Claro’s crawlspace mold solutions
Crawlspaces in St. Louis are exposed to constant moisture pressure. St. Louis’s humid summers, heavy rainfall, and shifting ground conditions create an ideal environment for mold growth beneath homes. When mold develops in the crawlspace, it doesn’t stay isolated. Spores rise into the living areas above, impacting indoor air quality and often triggering health symptoms without visible warning signs.
Beyond air quality concerns, crawlspace mold gradually damages insulation, floor joists, subflooring, and structural components. Left untreated, it can weaken the foundation of the home and lead to costly repairs over time.
That’s why Claro uses a dry fog treatment system rather than sanding, spraying, or removing materials. The fog fills the entire crawlspace, treating the air and every surface at once — including cracks and hidden areas traditional methods miss. It’s fast, non-invasive, and far less disruptive than conventional crawlspace remediation.
Our crawlspace mold remediation process

1
Full inspection and testing
We begin with a comprehensive crawlspace inspection to evaluate visible mold growth, moisture levels, and environmental conditions. When needed, air or surface testing is performed to understand the full scope of contamination before treatment begins.

2
Moisture control solutions
Mold cannot be eliminated long-term without addressing moisture. We identify contributing issues such as drainage problems, leaks, humidity buildup, or ventilation concerns and recommend corrective measures to prevent mold from returning.

3
Dry fog sterilization
Once moisture issues are addressed, we apply our dry fog treatment throughout the crawlspace. The fog penetrates porous materials, cracks, and hard-to-reach surfaces, neutralizing airborne spores and mold colonies simultaneously.

4
Antimicrobal surface shield
After treatment, an antimicrobial coating is applied to crawlspace surfaces. This protective barrier helps inhibit future mold growth, even when humidity levels fluctuate, extending the effectiveness of the remediation.
How Claro crawlspace treatment compares
Focused on health and indoor air quality
Family- and pet-safe treatment compounds
Treats air and surfaces at the same time
Fast turnaround, ideal for real estate transactions
