Start with conditions, not a product
On Charleston's low, flat ground, drainage and structural planning are really one problem: standing water against a foundation accelerates the same settlement that soft marsh soil is already causing on its own.
Build a complete scope
- Existing conditions and likely cause
- Preparation and protection
- Materials, compatibility, and installation details
- Permits, testing, cleanup, and restoration
- Exclusions, warranty terms, and change-order process
Charleston structural and drainage context
Tidal proximity and a high water table mean drainage choices near Charleston carry more weight than they might elsewhere, since there's less margin before water reaches the foundation again.