Crawl Space and Basement Waterproofing in O’Fallon, IL
Protect your health and your home with expert crawl space encapsulation, basement waterproofing, vapor barriers, and dehumidifier installs in O’Fallon, IL.
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Trusted Waterproofing for O’Fallon Homeowners
O’Fallon, IL is one of the fastest-growing communities in the Metro East—and with that growth comes a range of homes, from newer subdivisions to older properties that may lack proper foundation protection. Whether you’re facing humidity in your crawl space or seepage in your basement, the area’s clay-heavy soil and rainfall patterns create the perfect environment for moisture problems.
At Crawlspace and Basement Medic, we help O’Fallon homeowners stop those problems at the source. Our systems—ranging from vapor barriers and dehumidifiers to sump pumps and structural repairs—are designed specifically for Illinois soil, weather, and construction types.
Your home is an investment—don’t let hidden moisture chip away at its value.
Basement & Crawl Space Services in O’Fallon
We provide comprehensive moisture protection services for homes of every size and style:
- Interior French drain and trench systems
- Sump pump installation with optional battery backup
- Wall and floor vapor barrier solutions
- Foundation sealing and water redirection
- Floor-to-wall 20-mil vapor barrier systems
- Airtight vent, pier, and access door sealing
- Dehumidifier installation for air moisture control
- Drainage matting and sump system integration
- Designed for Southern Illinois humidity
- Maintains RH below mold-growth thresholds
- Energy-efficient, quiet, and auto-draining
- Installed in crawl spaces or basements
- Backup systems for storm readiness
- Discharge routed away from foundation for safety
- Custom-fit poly liners to block ground moisture
- Enhances indoor air quality and HVAC efficiency
- Ideal for vented or unsealed crawl spaces
- Replace damaged insulation and subfloor framing
- Joist, beam, and pier reinforcement
- Crawl space leveling and long-term stabilization
- Interior and exterior wall sealing
- Stops hydrostatic pressure and seepage
- Perfect for both finished and unfinished basements
Address
8204 Exchange Way, St. Louis, MO 63144
Phone Number
Serving Every Part of O’Fallon
We proudly serve neighborhoods and areas across O’Fallon, including:
Thouvenot Lane & Old Collinsville Road
Where crawl spaces benefit from encapsulation and humidity control
O’Fallon Downtown Historic District
Where older basements need sump pump systems and foundation repair
Thornbury Hill & Windsor Creek
Where newer homes still suffer from vented crawl spaces and poor drainage
Highway 50 Corridor & Seven Hills Road
Where sloped terrain requires full basement waterproofing systems
Why O’Fallon Homeowners Choose Us
New and Old Home Solutions
Whether your house is 100 years old or newly built, we design waterproofing systems to match
Air Quality and Comfort
Moisture in your crawl space travels into your living space—we stop it before it gets there
Protection That Lasts
Our work defends your structure, your air, and your long-term peace of mind
No High-Pressure Sales
We provide clear inspections and honest plans without scare tactics
Know the Signs of a Moisture Problem
- Damp or musty smells indoors
- Warped or cold floors over crawl space areas
- Water stains or white residue on basement walls
- Visible mold or mildew in crawl space
- Pooled water near the foundation after rain
- Allergy symptoms or poor HVAC performance
Are newer homes in subdivisions like Windsor Creek still at risk?
Yes—many newer homes have vented or unfinished crawl spaces that allow humidity and pests inside.
Can I just do one service now and expand later?
Absolutely—we offer phased services from vapor barriers to full encapsulation systems.
Will encapsulation help reduce energy bills?
Yes—sealing the crawl space stabilizes air temperature and eases HVAC strain.
How long does a full installation take?
Most O’Fallon-area projects are completed in 2–4 days.
Do you service nearby towns like Fairview Heights and Shiloh?
Yes—we serve the entire St. Clair County region.