Not all foundation cracks are emergencies — but knowing which ones are serious can save you thousands.
Types of Foundation Cracks
Hairline cracks (under 1/8 inch): Usually cosmetic, caused by concrete curing shrinkage. Seal with epoxy to prevent water intrusion. Cost: $500-$800.
Vertical cracks (1/8 to 1/4 inch): Often from settlement or soil movement. Can be repaired with epoxy injection. Cost: $800-$2,000.
Horizontal cracks: The most serious type. These indicate soil pressure against foundation walls. Requires carbon fiber reinforcement or wall anchors. Cost: $1,000-$5,000+.
Stair-step cracks in block foundations: Usually from differential settlement (one side sinking more than another). Cost: $2,000-$8,000 depending on cause.
When to Worry
Call a professional immediately if: cracks are wider than 1/4 inch, doors/windows are sticking, floors are sloping, or you see horizontal cracks. These are signs of structural movement.
For a free foundation inspection in Murrieta, call 951-633-9149.