After drought or heavy rain in San Antonio
San Antonio's clay soil swells when wet and shrinks when dry, so big swings in weather can show up in your walls and doors. New cracks after a drought or a wet spell are a good reason to get it checked.
What to look for
- New cracks after a long dry stretch
- Doors that change fit after heavy rain
- Soil pulling away from the slab edge
- Water pooling near the foundation
Why San Antonio homes show it
Most Bexar County soil is Blackland Prairie clay that expands when wet and shrinks when dry. That shrink-swell is the primary reason for foundation issues in the county (Texas Master Naturalist, Alamo Area Chapter).
Symptoms alone don't diagnose a foundation. It may be cosmetic or a drainage fix. A professional inspection tells you which.
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