Foundation Crack Repair for Charlotte Brick and Block

Filling one foundation crack typically costs $250–$800 (This Old House, 2026). That fixes the crack, not its cause. If a basement wall has bowed, the job becomes reinforcement at $4,000–$12,000 for about a dozen strips; if a corner has dropped, steel piers at $1,000–$3,000 each. Hairline cracks that stay put often need only sealing.

Which cracks need foundation crack repair?

• Hairline vertical cracks in a poured wall or slab usually come from concrete shrinking as it cured. Seal them if they leak; otherwise keep an eye on them.
• Stair-step cracks in brick or block follow the mortar joints. Thin and unchanging, they are often old news. Wider at the top or bottom, they suggest one end of the wall is dropping.
• Horizontal cracks in a block or poured basement wall mean soil pushing in from outside. Treat these as structural.
• Cracks through the bricks themselves, not only the mortar, mean a lot of force has passed through the wall.
• Cracks that open after a wet spell and close again in a dry one point to clay swelling and shrinking under that corner.

Brick veneer is not the foundation

Many brick houses are wood-framed, with a single layer of brick tied to the outside. That veneer rests on the foundation wall but carries little of the house's weight. A crack in it is a clue about the footing below, not the damage itself. Cracked veneer can be repointed for looks, but if the footing beneath keeps moving, fresh mortar splits again along the same line.

Ways a crack gets fixed

Routing and sealing widens a dry crack slightly and packs it with a flexible sealant. Injection forces resin through the full thickness of a poured wall; epoxy glues the two sides back together, and polyurethane foam is the choice where the crack weeps water. Tuckpointing rakes out broken mortar joints in brick and block and refills them. Reinforcement with carbon fiber strips or steel braces holds a basement wall that has started to bow, and steel piers under the footing lift and hold a corner that has dropped.

Why Charlotte cracks open and close

Cecil, the county's most common soil, has firm red clay with low shrink-swell, but about 18% of Mecklenburg County's soil acreage is in soils rated high or very high for it (USDA NRCS). With more than 3 inches of rain in every month at Charlotte Douglas Airport (NOAA) and hot summers drying the ground between storms, a footing on those soils can rise and fall a little each year. Before anyone fills a crack, fix the gutters and grading that feed water to that spot. Costs for each method are in the 2026 Charlotte foundation price table.