Concrete Crack Repair vs Replacement: How to Decide

Homeowners almost always want to repair, and contractors almost always want to replace. The honest answer usually sits between those two impulses. Here's what actually matters when deciding.

The three-question test

• How wide are the cracks? Under 1/4 inch is usually repairable. Over 1/2 inch usually isn't.
• How deep? Hairline surface cracking is cosmetic. Full-depth cracks running through the slab are structural.
• Has the slab moved? If sections have settled or heaved more than 1/2 inch, the base underneath has failed.

Repair options that actually work

Polymer-modified crack injection

For hairline to 1/4-inch cracks that aren't moving. Bonds the two sides together and prevents water intrusion. $8–$15 per linear foot in the Prescott area.

Grinding and resurfacing

For surface spalling or minor unevenness. A polymer-modified overlay is applied over the prepared slab. Not a permanent fix, but it can buy 5–10 years on a slab that's cosmetically ugly but structurally sound.

Slab jacking (mud-jacking or foam)

For settled slabs where the concrete itself is fine but the base has washed out. Foam is faster and less messy than mud-jacking; both work when the slab hasn't cracked apart.

When replacement is the honest answer

• Multiple full-depth cracks that keep growing year over year
• Any section that has heaved or settled more than an inch
• Rebar visible at the surface from spalling
• Water pooling on the slab that won't drain
• The slab is 30+ years old with visible failure across multiple areas

We'll always tell you when repair is the right call — even when it's a $600 job instead of a $10,000 replacement. The best long-term customer is one you didn't oversell.