The familiar signs of the foundation problems include:
Small or hairline cracks on the exterior walls of the foundation.
Several wall cracks in the internal walls of the foundation.
Any sagging, squeaking, or bouncing floorboards in your space.
Uneven floors and walls.
Persistent mildew smell from your basement or crawlspace.
Cracks or gaps between the planks and exterior walls.
Sloppy, sinking, uneven doors and windows.