Basement & Crawl Space Drainage in Schertz, TX

Water in a basement or crawl space is almost always the result of a drainage problem outside the home. Fixing it properly means addressing where the water is coming from — not just where it ends up. We connect Schertz homeowners with contractors who solve moisture problems in basements and crawl spaces by correcting the exterior drainage that's causing the intrusion.

Schertz sits at the junction of three counties northeast of San Antonio, its growth shaped heavily by nearby Randolph Air Force Base alongside its position along the I-35 corridor connecting San Antonio and Austin. Guadalupe County sits at the edge of the Blackland Prairie where it transitions toward the South Texas Plains, producing clay-heavy soil that shrink-swells through the region's wet-spring, hot-summer cycle, somewhat less dramatically than the deep blackland clay found in the Dallas area but still a real factor for yard drainage, particularly given the base's steady cycle of incoming and outgoing military families and the maintenance patterns that turnover tends to produce. Schertz's predominantly newer slab-built subdivisions, developed from the 1980s onward as the city transformed into a genuine San Antonio-metro suburb, mean the local drainage picture is mostly about subdivision-era engineering quality rather than aging infrastructure. Randolph Air Force Base's own housing turnover cycle here mirrors the same pattern found in Killeen and Harker Heights near Fort Cavazos, just on a smaller scale.

Finding the Source of the Problem

Water entering a basement typically comes from one of three sources: surface water that pools against the foundation and finds its way through cracks or gaps; groundwater that rises and enters through the slab or below-grade walls; or condensation from high humidity in the crawl space. Each cause requires a different solution. A provider assesses the exterior drainage conditions before recommending any interior waterproofing work.

Exterior Solutions First

Interior waterproofing systems manage water after it enters — they don't stop it. Exterior drainage solutions, including french drains along the foundation perimeter, improved grading, and proper downspout routing, address the problem at its source. In many cases, exterior drainage improvements significantly reduce or eliminate moisture issues without the need for interior systems.

This content is reviewed by the Texas Drainage Solutions editorial team and informed by licensed-contractor sourcing, manufacturer documentation, and established industry standards for Drainage. Read our editorial standards.