Massive foundation cracks
These cracks go clean through a concrete block in the crawlspace. The amount of pressure it takes t crack a block in half is just immense.
Water problems can contribute to foundation cracks
When the water gets into a crawlspace it can loosen the soil under a wall. Settling can happen unevenly and cause cracks.
Dark stains are from standing water in the crawlspace
When you see the dark stains on a crawlspace wall, that means that there has been standing water there. When the water raises it loosens the soil, and then the cracks get worse.
Small hairline cracks are still very bad
Even if the foundation crack is small, it is still a sign of a major foundation problem. Many times DryZone will use Helical and push piers to correct this problem.