Start with conditions, not a product
A crack that widens every dry August and closes back up in a wet spring is showing classic clay behavior, and that seasonal pattern shows up often on Rock Hill's Piedmont soil.
Build a complete scope
- What was measured, and whether it spanned a full wet and dry cycle
- Whether the house sits on shallow mill-era piers, block, or newer fill
- How water reaching the wall from uphill is being dealt with
- The chosen repair and what was ruled out before settling on it
- Access, finish restoration afterward, and exactly what is warranted
Rock Hill crack-repair context
Because clay along the Catawba corridor keeps cycling with the seasons, a crack repair near Rock Hill that ignores that movement tends to reopen within a year or two.