Foundation Uneven, old home
The danger of post and pier construction is that, if posts or piers start to fail, it can be very dangerous. In perimeter and slab foundations, the weight is distributed very evenly, so a partial failure or crack is an issue, but not an immediate safety problem. In post and pier homes, the weight is concentrated on the individual spots, so if something breaks, rots, or shifts, that area of the house may start to sag. In extreme cases, a house may even crack open as the weight shifts across the remaining posts and piers,if i were you i'd have a civil engineer look at it,and whatever you do don't try repairing it yourself,it's just too dangerous.