Florissant has one of the largest and oldest post-WWII housing stocks in the St. Louis metro — most of it built between 1955 and 1975 — and it sits in the Coldwater Creek watershed, which has flooded basements along its banks in 2008, 2013, and again in 2022. Combine 60+ year-old foundations, half-century-old clay-tile perimeter drains, and a creek that flashes hard during summer storms, and Florissant becomes one of the most consistent mold-remediation zones in north St. Louis County. Mold Solutions knows this corridor intimately.
Florissant’s dominant housing type is the post-WWII brick ranch — typically 3-bedroom, 1-bath, around 1,100 to 1,400 square feet, on a poured-concrete or block basement, often with a partial-finished rec room added in the 1970s or 1980s. Notable subdivisions include Paddock Hills and Paddock Forest in 63033, Old Jamestown-area builds in 63034, and Black Jack-edge tracts. The Old Town Florissant historic district is much older — late 18th and early 19th century — with brick homes on stone or rubble foundations.
Coldwater Creek defines the city’s hydrology. It runs the length of Florissant from south to north before joining the Missouri River, and extensive FEMA AE zones run through residential neighborhoods. Coldwater Creek has flooded repeatedly: 2008, 2013, 2015, and 2022 are all on the record. The combination of clay soils, aged drainage infrastructure, and a creek that crests fast means we work this corridor heavily every summer storm season.
Most Florissant basement mold callbacks have one of three sources: the sump pump (often original to the 1960s home), the perimeter drain (clay tile that has shifted, cracked, or filled with sediment), or surface drainage that channels runoff toward rather than away from the foundation. The fix depends on which one is the actual problem — and that’s the diagnostic step homeowners tend to skip.
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 Florissant 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 Florissant 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 Florissant home, these are the places worth checking annually.
We work Florissant 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 Florissant 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 Florissant 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.
Florissant homes are tough, well-built, and worth keeping in shape for the next generation. The right mold and moisture work is part of that — and we’d rather get out ahead of a problem than respond to a finished-basement disaster.
Family-owned, certified, and about 25 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 Florissant, browse our other location pages or visit our main St. Louis service hub.
