Put a record together first
Note where you're seeing it, when it started, whether it lines up with rain or humidity, whether it's changed over time, and anything already tried. A few photos and rough measurements make the first call more useful.
Read the local context
Rock Hill pairs textile-era streets and modest cottages with postwar brick ranches and rapid Charlotte-region growth. Rolling Piedmont terrain, clay soils, mature hardwoods, and intense summer rain make foundation movement, roof runoff, and site drainage practical inputs.
Plan for what gets closed back up
A patch of discoloration rarely tells the whole story once a wall gets opened. Stronger plans deal with how water is actually entering, the humidity level inside the space, the condition of the framing, how the work zone gets isolated, and confirmation once finished. Ask the provider to spell out in writing what prep and post-work checks won't be visible once everything's closed up.
Weigh full proposals, not just the number
Check that each proposal covers protection of surfaces and contents, how the crew will access the area, the actual materials specified, any City of Rock Hill permits needed, post-work testing, cleanup, finish restoration, exclusions, warranty terms, and how change orders get handled.
What official local sources add
Rock Hill provides historic-preservation guidance and a municipal stormwater program. Textile-era properties, mapped drainage, easements, and any local designation should be verified for the specific parcel.
Sources were reviewed June 20, 2026. Citywide preservation and stormwater guidance can't tell you one address's actual flood zone, drainage behavior, or historic-district status -- confirm those specifics, plus current permit rules, with the City of Rock Hill before authorizing anything.