Water intrusion is one of the most costly threats to multi-unit properties. ALP Construction offers professional waterproofing services tailored for HOA communities and large residential buildings across the Greater San Francisco and Bay Areas — protecting everything from podium slabs to playgrounds.
We identify and treat the most vulnerable areas of your property with proven solutions that extend building life and reduce future repairs.
Sealing and repair solutions to prevent structural leaks at foundational and decorative levels.


Critical junctions where decks meet building walls — expertly sealed to block water intrusion and damage.
Weatherproofing for elevated surfaces to prevent water pooling, rot, and safety hazards.
As part of ongoing relationships with HOAs and long-term clients, we also handle general interior repair.
Get expert waterproofing and drainage services that protect your community’s investment.
We understand the structural complexity and regulatory needs of multi-unit properties. ALP provides: