Signs of Foundation Problems in Louisiana Homes

A foundation rarely fails all at once. It moves a little, and the house reports it in small ways — a door that needs a shoulder, a crack that wasn’t there last spring. This guide groups those signs by where you will notice them and sorts them into “keep an eye on it” and “get it looked at.”

Why Louisiana houses show these signs

Clay soils common in parts of south Louisiana can swell as they take on water and shrink as they dry. A house sitting on that soil rides along. When the soil changes evenly under the whole house, the house mostly moves as one piece and nothing cracks. When one side gets wetter or drier than the other — a downspout that empties at one corner, a big tree pulling water from one side, a low spot where rain sits — the house moves unevenly, and uneven movement is what produces the signs below.

Most Baton Rouge-area housing is slab-on-grade. Pre-1960s housing stock is often pier-and-beam. The construction type matters, because a slab and a raised house report movement differently. A slab is one rigid piece, so it tends to crack or tilt. A pier-and-beam house sits on many separate supports, so it tends to sag, bounce, or drop at one pier. The pier-and-beam vs. slab guide explains how to tell which one you have.

Signs inside the house

• Doors that stick, drag, or swing on their own. A door that rubs at the top of the latch side, or that drifts open when you let go, is hanging in a frame that is no longer square. One door can be humidity or a loose hinge. Several doors in the same part of the house that changed around the same time point toward the floor under them.
• Diagonal cracks off door and window corners. Openings are the weak points in a wall, so stress collects at their corners. Cracks that run diagonally up and away from a corner tell you which way the wall is being pulled.
• Sloping floors. If a room feels like it runs downhill, or furniture rocks on one leg, the floor has moved relative to the rest of the house. Slope toward an outside wall suggests settlement along that side; a dip in the middle of a raised house suggests sagging between supports.
• Bouncy or soft floors. Mostly a raised-house sign: floors that flex under your step can mean shims have crushed, piers are too far apart, or framing has softened.
• Cracked tile and ridges under carpet. On a slab, a crack that runs in a straight line across a tiled room often follows a crack in the concrete underneath.
• Gaps at trim. Baseboards pulling away from the floor, crown molding separating from the ceiling, or a gap opening where a wall meets a cabinet are signs that two parts of the house are no longer moving together.

Signs outside

• Stair-step cracks in brick. Brick veneer is rigid and follows the foundation under it. A crack that steps diagonally through the mortar joints, especially near a corner, is one of the more reliable outside signs. If the bricks themselves are cracked, not just the mortar, the movement has been larger.
• The slab edge. Walk around a slab house and look at the exposed edge of the concrete. Cracks that run up from the ground, or a section that sits lower than its neighbor, are worth noting.
• Water that stands near the house. Not a sign of damage by itself, but a sign of a cause. Puddles that sit against the foundation a day after rain, or a corner where a downspout empties, mark the places where the soil is cycling hardest.

Signs under a raised house

On a pier-and-beam house, the clearest evidence is in the crawlspace: piers that lean or have cracked, shims that have crushed or slipped, sills and beams that look dark or soft, and standing water. A specialist should look as part of any evaluation. The pier-and-beam repair page explains how each of those is usually corrected.

What each sign can point to

No single sign diagnoses a foundation. This table is a way to sort what you are seeing before you call, not a substitute for elevation readings taken at the house.

Signs that come and go with the seasons

One pattern is easy to miss: a door that sticks through a wet stretch and closes fine in a dry one, or a crack that seems to open in late summer and tighten after a rainy winter. Soil that swells and shrinks with moisture can move a house a little in each direction over the course of a year. That back-and-forth is worth tracking. A house that moves a little and returns may be living with normal seasonal movement; a house that moves a little further each cycle without coming back is the one to have evaluated.

Keeping a simple foundation log

A note on your phone works. Each time you check, write the date and the weather — “after a week of rain,” “dry for a month” — and then:

1. List which doors and windows stick, and how badly.
2. Photograph each crack you are watching from the same spot, with something for scale.
3. Note any new cracks, and where.
4. Walk the outside after heavy rain and note where water stands.
5. For a raised house, note any change in how the floors feel underfoot.

A few entries over a few months show whether things are holding steady, cycling, or getting worse. The foundation crack repair page explains how to read the cracks themselves — which ones are shrinkage, and which ones show displacement.

Cosmetic, or worth an evaluation?

Usually fine to watch

• A single hairline crack that has looked the same for a long time.
• Thin drywall cracks along tape seams, with no sticking doors nearby.
• One door that sticks only in humid weather and has done so for years.
• Fine, even shrinkage cracks in a garage or porch slab.

Worth getting evaluated

• Several signs that showed up around the same time in the same part of the house.
• Any crack that is wider at one end, has an offset edge, or keeps growing.
• Floors you can feel sloping, or that bounce when you walk.
• Brick pulling away from windows or doors.
• Anything under a raised house: leaning piers, slipped shims, soft wood, standing water.
• Signs that keep getting worse from one season to the next instead of cycling back.

A good evaluation measures the whole floor and says in writing what is moving and why. Water is covered on the drainage and moisture correction page, a settled slab on the slab foundation repair page.

Published ranges put crack repair alone at roughly $400 to $1,500; the foundation repair cost guide has every job type.

After a flood, read the signs differently

After high water, some cracks may date from the flood or the rebuild rather than new movement — see foundation repair after flooding.

When you are ready, call (225) 535-8057 or send a request with what you are seeing. Your log, if you have started one, is the most useful thing to have on hand.