Chesterfield homeowners deal with a unique mix of mold risks: 1980s and 1990s subdivisions with deep unfinished basements built on heavy clay soils, post-1993-flood drainage that reshaped the entire valley, and a generation of original sump pumps and clay-tile drains that have now passed their service life. Mold Solutions has been the trusted certified mold remediation team for Chesterfield families since 2008, and we know exactly where the moisture in your home is most likely coming from before we ever set foot in your basement.
Chesterfield’s housing inventory is dominated by mid-to-large two-story homes built between 1980 and 2005, with newer construction continuing in the far-west 63005 corridor. Most of these homes sit on full unfinished or partially finished basements, with a meaningful share of walkout basements on the rolling terrain north of Clarkson Road. Walkouts have a particular mold-risk profile: their below-grade walls hold moisture against finished surfaces in ways slab-on-grade homes never deal with.
South of I-64, the Chesterfield Valley sits in the Missouri River floodplain. The 1993 Great Flood put more than four feet of river water across the Valley and rewrote local drainage expectations. The Monarch-Chesterfield Levee was completed to a 500-year standard in 2014, but the lessons of 1993 are still stamped into every Chesterfield basement remediation we do — the homes that stayed dry that year often did so because of perimeter drains and sump systems that are now 30+ years old and reaching the end of their service life.
North of Highway 40, the housing sits on the Ozark plateau bluffs. Bonhomme Creek and Caulks Creek drain through the residential corridors, and clay-rich soils hold water aggressively against foundations after extended rain. That combination — old sump pumps, aging clay-tile drains, and clay soils — is behind a large share of the finished-basement mold calls we get from Chesterfield homeowners every spring.
Whatever brought you to this page — a smell in the basement, a stain on the ceiling, a recent water event, or a real-estate inspection that flagged something — here’s what we do for Chesterfield homeowners.
Visual inspection, infrared moisture imaging, surface sampling, and third-party-lab air quality testing. We identify what species you’re dealing with, where it’s coming from, and how widespread it is — before any remediation begins.
Full IICRC-aligned remediation: containment of the affected area, HEPA filtration, removal of contaminated porous materials, antimicrobial treatment of remaining surfaces, and clearance air testing to confirm remediation success.
Specialized remediation for the three most common mold-impacted spaces in Chesterfield homes: attic sheathing blooms, finished and unfinished basement growth, and crawlspace vapor-barrier failures. Each requires its own containment and treatment approach.
Emergency water extraction, structural drying with daily moisture monitoring, and full restoration of finishes. Done right, water mitigation prevents the mold problem from happening in the first place — which is always cheaper than remediating after.
Across every St. Louis County ZIP we work in, the same five spots produce the majority of our mold-remediation calls. If you have a Chesterfield home, these are the places worth checking annually.
We work Chesterfield top to bottom — and we know each pocket of the city has a slightly different housing pattern and risk profile. Here’s what we see most often, by area:
Every Chesterfield mold project follows the same proven workflow. The order matters — skip the moisture diagnostic and you’ll be back in six months.
We come to your Chesterfield home, perform a full visual inspection, run infrared imaging to find hidden moisture, and confirm with moisture meters. If air quality testing is warranted, we collect samples for an accredited third-party lab.
Before we touch anything, we isolate the affected area with poly sheeting, negative-pressure HEPA filtration, and dedicated entry/exit airlocks. This keeps spores from spreading to clean parts of your home during the work.
Porous materials that can’t be salvaged — drywall, insulation, carpet pad — are removed and bagged inside the containment. Salvageable materials are HEPA-vacuumed and damp-wiped with EPA-registered antimicrobial products.
All remaining structural surfaces are treated with antimicrobial products selected for the specific substrate. Affected areas are dried below pre-loss moisture thresholds with monitoring data we share with you.
We perform clearance air-quality testing to confirm spore counts are at or below outdoor baseline. You receive a full report with all data and photos. We can coordinate with reconstruction trades or hand off to your contractor of choice.
Whether you’re in a 1980s walkout in Kehrs Mill or a newer build in Wildhorse, the right time to call us is the moment you notice the smell, see the staining, or hear the sump pump cycling more than usual. We’ll come out, find the moisture source, and fix the actual problem — not just the symptom.
Family-owned, certified, and about 20 minutes from your door. Same-day response for active water intrusion or major mold discoveries.
Mold Solutions · 12154 Lackland Rd, St. Louis, MO 63146
We serve homeowners across the St. Louis metro. If you’re outside Chesterfield, browse our other location pages or visit our main St. Louis service hub.
