Underground structures face permanent hydrostatic pressure. The water table doesn’t stop. Neither does the pressure on every joint, crack, and penetration in the structure.

Underground waterproofing is not retrofit-friendly. If the system fails, access for repair is often impossible or prohibitively expensive. It must be right the first time.

Systems We Specify

Pre-applied membranes: bonded to the concrete during pour, creating an integral barrier. Used on raft foundations and retaining walls before backfill. Post-applied membranes: crystalline, cementitious, and flexible sheet systems applied after structural completion. Injection grouting: polyurethane and acrylic injection for active leak remediation in existing structures. Waterstop systems: PVC, hydrophilic, and injectable waterstops at construction joints.

Design Approach

We specify based on the water table level, soil chemistry, structural movement classification, and design life. For metro and infrastructure projects, we follow the belt and braces principle: primary and secondary barriers with drainage management between.

Reference Projects

DMRC metro stations (multiple lines). Pune Metro underground sections. Deep basements for commercial developments in Delhi NCR.