Waterproofing in San Francisco, CA

San Francisco building conditions rule out the straightforward approach more often than not. Zero-lot-line construction, steep grades, protected facades, and shared walls mean exterior excavation is frequently off the table. That is exactly where our interior and injection work earns its place: polyurethane crack injection, curtain grouting, negative-side coatings, and interior perimeter drainage.

Garages built into the slope below the living space are a recurring call. Water moving downhill collects against the rear wall, and the first sign is usually efflorescence or a persistent damp patch. We identify whether the source is hydrostatic pressure, surface water that is not being directed away, or a failing cove joint, then design around the answer.

In multi-unit buildings, leak diagnosis matters more than anywhere else — a stain in one unit often originates two floors up on a shared deck or planter. We use electronic detection and controlled water testing to isolate the real source before anyone opens a wall.