A home doesn't experience weather evenly. In the Houston area, south- and west-facing walls typically receive the most intense afternoon sun. Those surfaces heat up significantly during the day, then cool after sunset.

Stucco is a strong, beautiful finish—but it’s not waterproof. It’s designed to breathe, to let moisture move through and out. When water gets in faster than it can escape, that’s when you see the telltale signs.