Signs of Foundation Damage: What to Look For
This guide explains the common signs of foundation damage in Oklahoma City-area homes, how to tell cosmetic cracks from structural movement, and when to get a free inspection.
Foundation movement rarely shows up as one big crack. It usually appears as a pattern of small signs inside and outside the home.
- Stair-step cracks in brick or block
- Diagonal drywall cracks over doors and windows
- Doors or windows that stick or won't latch
- Sloping, uneven or bouncy floors
- Gaps between walls and ceiling or around frames
- Water pooling near the foundation after rain
Outside the Home
- Stair-step cracks in brick or block, especially near corners.
- Gaps where brick meets window or door frames.
- Soil pulling away from the slab edge in dry weather, or water pooling after rain.
- Leaning chimneys or porches separating from the house.
Inside the Home
- Diagonal drywall cracks from the corners of doors and windows.
- Doors that stick, swing open or won't latch, and windows that bind.
- Sloping, uneven or bouncy floors.
- Gaps between walls and the ceiling or floor, and cracked tile.
Cosmetic or Structural?
Thin hairline cracks that stay the same size are often from concrete shrinkage and are usually cosmetic. Cracks that are wider at one end, keep growing, come back after patching, or appear together with sticking doors and sloping floors point to movement and are worth an inspection.
Why Signs Come and Go in Oklahoma
Clay soils swell when wet and shrink when dry, so cracks can open in drought and partly close after rain.[2] USDA data shows shrink-swell clay limiting slab homes on about 21% of Oklahoma County's mapped land.[16] Read more in the clay soil guide.
What to Do Next
- Photograph cracks with a ruler or coin for scale and note the date.
- Check gutters, downspouts and grading.
- Get a foundation inspection. For major or disputed movement, see when to call a structural engineer.
For Home Buyers
- Foundation red flags checklist for OKC home buyers
- Inspection report found foundation issues? Next steps
Related Services
More: all guides.
Frequently Asked Questions
Which foundation cracks are serious?
Cracks wider at one end, stair-step cracks in brick, cracks that keep growing or return after patching, and cracks combined with sticking doors or sloping floors are worth having inspected. Thin, stable hairline cracks are often cosmetic.
Why do my cracks get bigger in summer?
Clay soil shrinks as it dries, so foundations on clay can drop and cracks can widen during hot, dry periods, then partly close after rain.[2]
Should I patch cracks before an inspection?
No. Leave them visible so the inspector can see their size and pattern. Patching can seal a cosmetic crack but won't stop movement.
How does your free quote service work?
OKC Foundation Repair Experts is a free quote and referral service that connects Oklahoma City-area homeowners with local foundation repair companies. You fill out the short form, and a local foundation repair company serving your area contacts you to schedule an inspection and give a written quote. The request is free, and you are never obligated to hire anyone.
Last updated 2026-10-29.
Sources
Figures are third-party published estimates, not quotes. Retrieved 2026-10-29.