Concrete expansion joint failing — Los Angeles, California
Expansion joints are the flexible seams cut into driveways, sidewalks, and patios that let concrete slabs expand and contract with temperature changes without cracking. When the filler material dries out, crumbles, or pulls away, water seeps into the gap, erodes the sub-base, and accelerates slab movement and cracking. A concrete mason cleans out the old filler, applies a backer rod for proper depth control, fills the joint with a self-leveling polyurethane sealant, and tools the surface flush to restore long-term flexibility.
Who to call
For this problem in Los Angeles, call a: Betonwerker
Vind een Betonwerker in Los AngelesSymptoms to look for
- Gray or black filler material is crumbling or missing from the joint
- Weeds or grass growing up through the gap between slabs
- Water pools along the joint line after rain instead of draining
- Adjacent slabs are shifting or becoming uneven at the joint
- Cracks radiating outward from the ends of the deteriorated joint
Spoeddienst in Los Angeles
Emergency services in Los Angeles typically respond within 30–60 minutes during business hours, but traffic can extend response times to 2+ hours across the metro area. After-hours emergency plumbing and electrical services run $125–$250/hour. California law requires contractors to be licensed for work over $500.