Check the Simple Causes First
Inspect hinges, screws, strike alignment, swelling, and obvious local damage before assuming the foundation is responsible.
Changes Across Multiple Openings
Several doors or windows changing operation in the same period can be more meaningful than one isolated opening.
Look at Nearby Finishes
Cracks, trim separations, visible racking, or floor changes around the same area provide additional context.
Evaluate the Whole Pattern
When sticking openings appear alongside other movement, a foundation or structural evaluation can help determine whether the issues are connected.