Start with conditions, not a product
A crack that opens wider every August and tightens back up by January is telling you something about the ground, not just the wall: Piedmont clay under most Birmingham lots swells when it's wet and pulls away from foundations as it dries, and iron-ore-era fill under some older in-town lots adds another variable worth mapping before any patch job gets specified.
Build a complete scope
- What was measured and across how many months of the wet-dry cycle
- Whether the house sits on ridge fill, in-town masonry piers, or block walls
- How uphill groundwater loading the wall is being handled
- The proposed method, and the alternatives ruled out on the way to it
- Access on a graded lot, restoration afterward, and warranty terms
Birmingham context
Cracking patterns often line up with when a Birmingham block was built: older in-town and mill-village construction from the iron and steel era behaves differently than the ranch houses that filled Vestavia Hills, Mountain Brook, and Homewood during the postwar suburban push along U.S. 31 and 280. Either way, the clay-heavy Piedmont soil beneath the metro shifts enough with the seasons to keep cracking a recurring issue.