Understanding Basement Waterproofing
Basement water intrusion is one of the leading causes of structural damage, mold growth, and poor indoor air quality, especially in moisture-heavy areas like Seattle, Redmond, Bellevue, Kirkland, and the Eastside. Effective basement waterproofing protects your home by addressing the root causes of moisture, including hydrostatic pressure, foundation cracks, failed footing drains, and poor exterior drainage. The process often includes installing interior drainage systems, sealing cracks, redirecting groundwater, and applying moisture barriers to keep your basement permanently dry. By waterproofing your basement, you prevent costly repairs, stop mold before it spreads, improve your home’s air quality, and increase long-term property value. At Wet Basement Services, our specialists deliver proven, permanent waterproofing solutions using our proprietary Extreme Water Abandonment (EWA) System, engineered to keep your basement dry for life.
Signs You Have Water In Your Basement


Do you see any of these basement water intrusion signs? Schedule a free inspection and quote now.
Main Causes of Water Intrusion In Your Basement
Clogged Footing Drains
Heavy Rain
Soil Settling
Hydrostatic Pressure
Basement Waterproofing Solutions
Basement Sump Pump
A sump pump is one of the most important components of a basement waterproofing system. It removes standing water before it reaches your floors or walls and helps prevent flooding during heavy rain or rising groundwater. For homes in Seattle, Redmond, Bellevue, and surrounding areas, a properly installed sump pump provides essential protection against recurring moisture and long-term water damage. If you are planning any type of basement waterproofing, a sump pump should be included in the overall solution.
Interior French Drain
If water collects around the edges of your basement or you notice damp spots along the perimeter, an interior French drain may be needed. This system creates a hidden drainage channel along the inside foundation wall that redirects water into the sump pump basin for safe removal. Adding a professionally installed interior drain helps keep your basement dry, prevents mold, and relieves hydrostatic pressure beneath the slab.
Exterior French Drain
When water pools around the outside of your foundation or the soil becomes saturated, an exterior French drain can help move groundwater away from your home. This system is placed around the outside perimeter and captures water before it reaches your foundation walls. Including an exterior drain as part of your waterproofing strategy provides an extra layer of protection against basement leaks and moisture intrusion.
Before and After Images







