Foundation Warning Signs: What's Normal and What's Not

Every House Settles a Little

Almost every home shifts slightly in its first few years as the soil under it adjusts to the weight of the structure. A hairline crack here or there, especially near a door frame or window corner, is usually part of that normal settling and not a sign of a bigger problem.

The difference between normal settling and a real foundation problem usually comes down to degree and whether it's getting worse. A crack that showed up once and hasn't changed in two years is a different situation than one that's visibly wider than it was last month.

Cracks: Size and Shape Matter

A vertical hairline crack you can barely see is typically low concern. A crack wide enough to fit a coin into, one that runs diagonally, or a stair-step crack zigzagging through brick mortar joints are all signs worth having looked at.

Pay attention to whether a crack is on the outside of the house, the inside, or both in the same spot. Cracks that line up on both sides of a wall are more likely to be structural than a crack that only shows up on one finished surface.

Doors, Windows, and Floors

A door that's always been a little tight isn't new information. A door or window that used to open and close easily and suddenly started sticking this year is. The timing of the change matters more than the fact that it sticks at all.

Floors are similar. Walk a straight line across a room and pay attention to whether it feels level. A slight, long-standing dip in an old house isn't necessarily urgent, but a new slope, or a spot that feels soft or bouncy, is worth checking.

Signs Outside the House

Check where your yard slopes relative to the foundation. Water should move away from the house, not pool against it. Standing water near the foundation after rain, especially if it's a new pattern, often points to a drainage issue that can eventually affect the foundation itself.

Also look at exterior brick or siding for the same stair-step cracking pattern you'd check for inside, since outdoor cracks are sometimes easier to spot than indoor ones.

When to Actually Call Someone

If you're seeing more than one of these signs together, cracks plus sticking doors, or a sloped floor plus visible water pooling outside, it's a good time to get a local contractor to take a look. Most offer a free first visit, so there's little downside to asking.

If you're only seeing one mild sign and it hasn't changed in a while, it's reasonable to keep an eye on it for a few months before calling. Measuring a crack's width now and checking again later is an easy way to track whether it's actually getting worse.