Waterproofing & Leak Detection

Liquid-applied waterproofing membranes for decks, foundations, walls, and windows. Protect against the wet Northern California winter.

Our crews bring decades of hands-on experience to every waterproofing project. We work clean, we communicate with the GC and adjacent trades, and we deliver scope on schedule.

Every project starts with a careful site walk and a written estimate. We assess substrate condition, coordinate with framing/sheathing/window trades, and call out any prep that needs to happen before our crew mobilizes. We handle the entire stack in-house: lath, mesh, scratch coat, brown coat, finish coat — and any specialty system called out by the architect.

"Just wanted to let you know your One Stop crew did a fantastic job applying the stucco over here at the new kitchen bump-out. As usual they were efficient and clean, and those whimsical trowel swoops match the existing really well!"