Many homeowners search for signs of foundation problems after noticing something odd: a crack above a door, a door that has started to stick, or a floor that feels off. The tricky part is that almost every house shows some of these signs, and most are not emergencies. This guide helps you tell what is probably normal from what is worth a professional look. It is general information, not a diagnosis, and only an inspection of your house can say what is going on.
Inside the house
- Doors and windows that stick or will not latch. Especially when several do it at once, or the gap above a door frame is wider on one side than the other.
- Diagonal cracks in drywall. Cracks that start at the corner of a door or window and run at an angle are more concerning than a straight hairline crack along a seam. Wide cracks, or ones you can slip a coin into, deserve attention.
- Sloping or uneven floors. A marble that rolls across a room, a visible dip, or furniture that rocks. Slopes can also come from construction, so context matters.
- Gaps between walls and floors, or between walls and ceilings, and trim or baseboards that separate from the wall.
- Cracked or lifting floor tile. Tile follows the slab, so a crack that continues across several tiles or along a line can mean movement underneath.
- Bouncy or soft spots in the floor in pier and beam houses, which can point to sagging beams, deteriorated supports, or moisture in the crawl space.
Outside the house
- Stair-step cracks in brick, following the mortar joints, or brick that is separating from window and door frames.
- Visible cracks in the slab edge or garage floor. Many are shrinkage cracks from curing, so look for cracks that are wide or offset, where one side is higher than the other.
- Gaps around windows and doors, with caulk that keeps splitting.
- Pulling away of porches, chimneys, or garage slabs from the main structure.
- Water pooling next to the house, missing or clogged gutters, downspouts that dump near the foundation, or soil that has pulled away from the slab. These do not prove foundation damage, but they can contribute to it.
What is often harmless
- Hairline cracks in drywall or paint, especially in a house within its first few years as it settles.
- Small vertical cracks in a slab or garage floor that have not changed.
- Seasonal sticking of doors that eases when humidity changes.
- Minor cracks in mortar joints that are not growing.
The point is not that these are never a problem. It is that a single small sign is rarely enough on its own. Patterns across several rooms, growth over time, and signs on both the inside and outside are more convincing.
Why foundations move around Lubbock
Soils on the South Plains commonly include clay that swells when wet and shrinks when dry, so a foundation can move as moisture in the soil changes. Dry stretches followed by heavy rain, water that collects near the house, poor grading, leaking plumbing or irrigation lines, and construction issues can all play a part. Because these factors vary from one lot to the next, two neighbors can have very different experiences. A good inspector looks at the grading, gutters, and plumbing as well as the foundation.
How to track what you see
- Take dated photos of cracks, with a ruler or coin beside them.
- Mark the ends of a crack with a pencil and a date. See whether it grows past the marks.
- Note which doors and windows stick and whether it changes with the weather.
- Walk the outside after a rain and look for pooling water, downspouts that dump near the house, and low spots.
- Write down when you first noticed each sign. This helps an inspector, and it matters if you later sell the house.
When to get an inspection
Consider an inspection if cracks are widening, doors and windows are sticking in several places, floors are visibly uneven, brick is cracking, or you are buying or selling the house. An inspection does not commit you to a repair. Get more than one opinion if you can, and consider an independent engineer if the stakes are high. Our guide to choosing a foundation repair company explains how, and the cost guide gives planning ranges. Not sure whether you have a slab or a pier and beam foundation? See slab vs pier and beam repair.
If you see water coming into the house, a gas smell, a rapidly widening crack, or a floor or wall that seems to be moving, treat it as urgent. Call the appropriate emergency or utility service, and have a professional look at the house promptly.
Frequently asked questions
Are all cracks a sign of foundation failure?
No. Hairline cracks in drywall, paint, or brick mortar are common in most houses. Cracks that are wide, growing, diagonal from door or window corners, or paired with sticking doors and sloping floors deserve a closer look.
How can I tell if a crack is getting worse?
Mark the ends of the crack with a pencil and date it, measure its width, and photograph it next to a ruler. Check again every few weeks, and across wet and dry weather. Growth over time is more telling than the crack itself.
Do sticking doors always mean the foundation moved?
No. Humidity can swell wood doors, and hinges can loosen. But when several doors and windows start sticking at once, or the gap at the top changes shape, it can point to movement.
Can foundation problems fix themselves?
Sometimes seasonal movement is temporary and reverses as soil moisture changes. But a foundation that has moved because of ongoing drainage or plumbing problems typically does not fix itself. An inspection can tell the difference.
Who should I call first?
That is up to you. You can call a foundation repair company for a free inspection, an independent structural engineer for an unbiased report, or both. Many homeowners get more than one opinion.