Can I ignore a foundation crack?
If you notice a crack, see if it changes over time. If there’s little or no change over a year, you’re probably safe to ignore it. If there’s significant change over a year (or less), consult with a foundation repair specialist. If the crack is letting in groundwater, take care of drainage problems on the exterior, then patch the crack. It may be helpful to patch any crack so you can more easily track any changes.