Foundation leaks, crumbling and cracking.  Weeping tiles, Window wells

 Signs that your home may need foundation repair:

Gaps have appeared between window & door frames
Windows & doors in your home have become difficult to open
Interior walls show cracks in the plaster
Your home's ceilings are covered in nail pops
Walls in your basement are bowed or leaning
Uneven Flooring
Foundation is sinking
Your basement is leaking
Your home's chimney is tilted

 A house foundation can become weakened due to:

Poor drainage
Soil evaporation
Adverse soil conditions
Presence of excessive moisture
Transpiration (Tree roots impinging on the foundation structure)
Poor foundation construction
Poor ground preparation
Leaking plumbing