Foundation Inspection in Southern Indiana
Foundations in the Ohio valley bottomland sit on alluvium — soil deposited by the river over a long period, in layers that vary in composition and density across short horizontal distances. That variability is what makes settlement here look different from settlement in the uplands.
A house spanning a change in the underlying deposit settles unevenly, and because the deposits are irregular the pattern often does not correspond to anything visible on the surface. Cracking can appear in the middle of a wall rather than at a corner, which is counterintuitive if you are expecting the tidy cut-fill signature of a graded subdivision.
The high water table compounds it, since a fluctuating groundwater level changes the effective stress in the soil and can drive movement over years in a house that appeared to have settled long ago.
What We Look At Here
- Floor elevation survey to map settlement that may not follow the building footprint
- Crack patterns read for the irregular support characteristic of alluvial deposits
- Basement or crawlspace walls for combined settlement and hydrostatic effects
- Whether movement appears active, including seasonal correlation with river stage
- Prior underpinning, piering or slab work and whether it has held
- Sump operation and interior drainage as an ongoing factor in soil behavior
More on the service itself: Foundation Inspection. More on the area: Southern Indiana.
Questions
Frequently Asked Questions
Why is my New Albany house cracking in the middle of a wall rather than a corner?
Alluvial soils vary over short distances, so the support under a footing can change mid-wall. That produces cracking away from corners, which is unusual in graded subdivision soils but ordinary in river bottomland.