Horizontal Wall Crack
A horizontal wall crack by the window is one of the first signs of a failing wall.
Stair-step Wall Crack
Stair-step wall cracks are the second stage of in bowing walls.
Cracking Bowing Wall
Here you can see a wall that is almost at the stage of collapsing.
Pushing-in at the Bottom of the Wall
This is a definite sign that your wall is failing and you should have it seen to as soon as possible otherwise it will become a serious danger.
Cracks in Corner of Wall
The corners of the house are the strongest parts of the structure. Here you can see the cracks in the corner, meaning that the structural integrity of the house is compromised.