Waterproofing in Mill Valley, CA

Mill Valley's homes sit in steep, wooded terrain where surface water and subsurface flow are constant concerns. Water moves downhill through the hills, collects against retaining walls and below-grade walls, and enters through cold joints, cracks, and failed membranes. The symptoms often show up far from the actual entry point, so diagnosis comes before any repair.

Many properties here have finished basements, subterranean garages, or hillside additions where excavation would disturb mature redwoods, hardscape, or steep slopes. In those cases we work from the interior with injection grouting, negative-side waterproofing, and drainage systems designed around the specific topography.

Decks and terraces over living space are exposed to heavy rainfall, shade-related moss growth, and tree debris that can clog drains. We install coating systems with reinforced detailing at every penetration and recommend a maintenance rhythm that keeps drains clear and membranes intact.