Start with conditions, not a product
A damp Roswell basement can start from grading, gutter overflow, a cracked wall, slab humidity, or backpressure against the footing -- the symptoms overlap even when the underlying fix doesn't.
Build a complete scope
- Which wall takes water, and whether it arrives from uphill on the lot
- Whether a stream buffer or floodplain limits what may be dug outside
- Grading, downspout discharge, and drainage corrected before interior work
- The interior system, sump capacity, and where the discharge is sent
- Reinstating finished rooms, and the exclusions written into the guarantee
Roswell context
Below-grade water here is a slope problem before it is a wall problem. Roswell climbs the rolling Piedmont above the Chattahoochee, so a below-grade wall on one of these lots is loaded from the uphill side rather than evenly around the structure, and the thunderstorm-heavy summers common to the river corridor deliver the water in short intense bursts. Red clay is what makes it persist: it holds water for days rather than draining, so the uphill face stays loaded long after the rain stops. Heavy tree canopy slows drying further. The mechanism explains why so many repairs here fail when they are attempted only from inside the wall.