Start with conditions, not a product
A Charleston slab dealing with pluff mud, tidal groundwater, and hurricane-season humidity needs moisture testing, a contamination check, crack and joint condition, surface profile, cure temperature, UV exposure, and traffic load verified before any coating system gets chosen.
Build a complete scope
- Existing condition and likely cause of the problem
- Protection measures before any work starts
- Materials chosen for a Lowcountry coastal climate
- Permitting, testing, cleanup, and restoration
- Exclusions, warranty terms, and change-order pricing
Charleston context
A high water table under a flat coastal city is the condition that decides this work, and it is why Charleston is a harder place to coat a floor than the product literature assumes. Groundwater sitting close to the surface keeps a slab supplied with moisture year-round, and that moisture moves upward through the concrete continuously -- so a coating applied over a slab that has not been moisture-tested is the most common way this work fails, blistering or releasing months later with nothing visibly wrong on the day it went down. Persistent humidity compounds it from above by narrowing the temperature and dew-point window in which a coating will cure properly, which is why timing the application matters as much as selecting the product. Slabs in older construction frequently went down with no vapor retarder at all, and a garage or ground-floor slab in an area subject to tidal flooding may have been wet repeatedly.