Buildings in Orange County never sit still. Daily temperature swings drive expansion and contraction, intense UV breaks down exposed sealant, and frequent storms push water against every seam. When a joint loses its movement capability, gaps open at expansion joints, window perimeters, and envelope penetrations.
The result shows up as water stains, interior mold, corroding steel, and rising HVAC costs from air infiltration. Proper joint sealing, specified to the right movement class under ASTM C920, accounts for how much a joint actually flexes. That difference is why professional installation outlasts a typical maintenance re-caulk.
