I have an old barn/garage that has mason block walls. The entire foundation is a concrete slab with footings for the exterior walls. For some reason, about 6 inches from the exterior walls, the concrete is cracked, and is sticking upwards.
Why is this happening and is it something I need to worry about?
I plan to frame a wall across this, however, the crack makes the flooring uneven, so how do I even out the floor?