What counts as foundation repair
A foundation does two jobs: it carries the weight of the house down to the ground and it keeps the house level. Repair is needed when the part that does that, whether a footing, pier, wall or slab, has moved, cracked or deteriorated enough to compromise one of those jobs.
In Charlotte the job usually falls into one of three groups.
| Group | What’s typically wrong | Where to read more |
|---|---|---|
| Crawl space structure | Sagging joists or girders, settled or tilted piers, rotted framing | Sagging floors, joists and girders |
| Slab and masonry | Cracks that widen, uneven slab, stair-step cracking in block or brick | Crack repair |
| Soil and water around the house | Poor drainage, gutters dumping at the wall, drying or saturated soil | This page and the soil guide |
Angi reports that basements are rare in Charlotte and slab foundations are popular, so most repair work here is on slabs and crawl spaces.
Why the cause matters more than the method
Two houses with the same crack can need different repairs. One moved because a downspout soaked the soil beside it. Another moved because the footing was shallow when it was built. A third has a crack that stopped moving years ago and only needs sealing. If the repair doesn’t address the cause, the problem tends to come back.
Charlotte’s ground varies. The county soil survey rates its major soils from low to very high for shrink-swell, and the largest unit, Cecil, covers 41% of the county. Some parts of the county sit on Iredell soil, which the survey rates very high. A rating on a map isn’t a diagnosis; a contractor still needs to inspect your lot. The NC Geological Survey notes that shrink-swell movement can produce cracked walls, uneven floors and foundation cracks, and those same signs can also come from poor drainage or a plumbing leak.
Call to schedule an inspection
Common repair methods
Piers and supports. Where a house or span has settled, a contractor can add piers under it or reset existing ones to carry the load. Crawl space support piers covers how this works under a floor. Pier count and spacing should follow where the house actually moved.
Underpinning. Underpinning extends or deepens a footing so that the structure rests on more stable material. It is among the most expensive repairs: HomeGuide puts it at $10,000–$30,000+.
Framing repair. In a crawl space, rotted or overloaded joists are often sistered (bolted alongside) or replaced, and girders are repaired or supplemented. HomeGuide lists sistering at $150–$325 per joist and joist replacement at $350–$1,000 per joist.
Wall stabilization. For a bowed or leaning masonry wall, contractors may brace it from inside or reinforce it before correcting the pressure that pushed it.
Cracks. Hairline cracks are sealed to keep water out. Cracks that are moving first need the movement explained. See foundation crack repair.
Drainage and moisture. Gutters, grading and sometimes a crawl space drain are part of a repair that lasts. The EPA recommends grading soil to slope away from the foundation so water doesn’t collect. Damp crawl spaces are covered separately under encapsulation.
How a repair gets planned
A sound plan follows the same order every time.
- Find what moved. The contractor measures floor levels, checks crack widths, looks at piers and framing, and notes where water goes around the house.
- Find why it moved. Drainage, plumbing leaks, rotted wood, soil that dried out, a footing that was too shallow. The reason decides the fix.
- Choose the smallest repair that addresses the cause. Sometimes that is a few piers and a regraded yard. Sometimes it is underpinning a corner. Sometimes it is a monitoring period before anything is done.
- Put it on paper. The plan lists the work, where each support goes, what the price includes and how long the job takes.
- Permit, work, inspection. Where a permit applies, the county inspects before the work is covered up.
A contractor who skips to the price without explaining steps one and two hasn’t given you enough to compare.
Call to schedule an inspection
What to expect during the work
Most crawl space and exterior work happens without moving out. Expect workers using the crawl space access, some digging beside the house, and noise. If part of a house is lifted, new hairline cracks or a sticking door upstairs can appear while the structure settles into its new position, so ask beforehand how the contractor handles cosmetic damage. Keep pets and children clear of the work area, and ask for a clean-up walkthrough at the end.
What repair can and can’t promise
Repair can stabilize a section, restore support, and slow or stop movement at the point it addresses. It cannot guarantee the whole house will never move again. Soil keeps shrinking and swelling with the weather, and Mecklenburg County has been through a serious drought this year. Treat any promise that movement will never happen again as a reason to ask more questions.
It also can’t make a floor perfectly level. Lifting is limited by what the framing and finishes can take, and a contractor may stop short of full correction to avoid new cracks upstairs. Ask what result to expect before you agree to a plan.
Call to schedule an inspection
When a structural engineer helps
If one contractor says piers and another says drainage, an independent opinion has value. HomeGuide lists a structural engineer’s foundation inspection at $300–$750, and Homeyou’s Charlotte page puts evaluations at $250-$600. An engineer you hire works for you rather than for a repair company. Read the comparison of inspection types.
Before you sign
- Ask what was found, where, and for photos and measurements.
- Ask how many piers or supports, what type, where, and on what footings.
- Ask whether the price includes the permit, drainage, cleanup and any letter from an engineer.
- Ask what happens if more rot or movement turns up.
- Get the scope, cost and completion date in a written contract.
- Pay nothing before a written contract and be wary of cash.
- Ask what the warranty covers, for how long, and whether it transfers to a buyer, and get it in writing.
Charlotte Foundation Guys runs this site and the phone line. Work is done by independent local contractors, and pricing and availability are set by the contractor serving your area.
Want a contractor to look at it? Call to schedule an inspection.