Introduction Your basement should be a dry, usable extension of your home—not a damp, musty afterthought. Unfortunately, many homeowners experience basement leaks or moisture without understanding the cause or long-term risks.
What Causes Basement Moisture?
Cracks in walls or floors
Poor exterior drainage
Clogged or misdirected gutters
High groundwater levels
Faulty window wells
Even new homes can suffer from basement leaks if these issues are not addressed correctly.
Why Moisture Is a Problem Beyond the nuisance of a wet floor, excess moisture can:
Cause mold and mildew growth
Rot wood framing and damage drywall
Lead to musty odors
Lower indoor air quality
Weaken your home’s foundation
Common Waterproofing Methods
Interior Sealants: Quick fix for minor leaks, but not a long-term solution
Interior Drainage Systems: French drains or sump pumps redirect water from inside
Exterior Waterproofing: Involves excavating and applying waterproof membranes and proper grading
Crawl Space Encapsulation: Ideal for homes with crawl spaces that suffer from high humidity or standing water
How STL Polyjack Approaches Waterproofing We begin with a full inspection, identify the source of the leak, and propose a tailored solution. No guesswork, no one-size-fits-all approach.
When to Waterproof Your Basement
You see visible water after rain
Musty smell or high humidity
Staining on walls or floor
You plan to finish the basement
Seasonal flooding
The Long-Term Benefits
More usable living space
Healthier indoor air
Stronger home value
Protection against foundation damage
Maintenance Tips
Clean gutters regularly
Extend downspouts at least 6 feet from your home
Check sump pumps annually
Grade soil away from your home’s foundation