Basement waterproofing for San Francisco homes, exterior drainage, interior membranes, and sump systems sized for hillside lots and water-prone foundations. We diagnose the moisture source first, then fix it properly.
Most basement water problems in San Francisco trace to one of three things: hillside drainage pushing water into the foundation, failed waterproofing on an older foundation, or plumbing leaks masquerading as groundwater. Patching the wall without finding the source is how homeowners pay for the same problem twice.
We start with a moisture assessment to figure out where the water is actually coming from, then scope the fix accordingly, exterior drainage, interior membrane, sump pump, or a combination.
We identify where the water is entering, grading, drainage, foundation walls, or plumbing, before scoping a fix.
French drains, perimeter drainage, and grading corrections that move water away from the foundation in the first place.
Interior waterproofing membranes and drainage channels for situations where exterior work isn't possible.
Sump pump installation sized to the volume of water you're dealing with, with battery backup where appropriate.
Targeted sealing of foundation cracks that are letting water through.
We don't apply band-aids. The fix is sized to the actual problem and built to last.
Diagnosis comes first. Water can enter from exterior grade, hillside runoff, plumbing leaks, or rising damp. Once the source is identified, the fix gets matched to it: exterior drainage, interior membranes, sump systems, or some combination. Guessing wastes money and rarely solves the problem.
Discuss your project →Send a few details and Michael will reach out to schedule an on-site walk-through. Or call us directly at (415) 218-9270.