Architectural Restoration & Waterproofing (ARC) provides comprehensive commercial deck repair, restoration, reconstruction, and waterproofing services throughout San Francisco, Marin County, and the greater Bay Area. We specialize in larger-scale projects for condominium communities, apartment and multifamily buildings, HOAs, commercial properties, and managed building portfolios.

Exterior decks, balconies, walkways, and elevated traffic surfaces on multifamily and commercial buildings are continually exposed to moisture, UV exposure, building movement, and regular pedestrian traffic. When coatings, flashing, drainage details, or waterproofing assemblies begin to fail, water intrusion can damage not only the deck surface but also structural framing and adjacent portions of the building envelope.

ARC provides an integrated approach designed for substantial deck restoration and waterproofing projects where multiple repair disciplines may be required.

Condominium & Multifamily Deck Repair

ARC evaluates existing deck surfaces, substrates, waterproofing systems, flashing, drainage, and adjacent building components to determine the appropriate scope of restoration.

Depending on existing conditions, our work may include removal of failed coatings and damaged materials, dry rot repair, structural wood replacement, substrate reconstruction, flashing improvements, concrete repairs, waterproofing, coatings, and finish restoration.

Commercial Deck Waterproofing

Deteriorated deck substrates must be identified and repaired, existing failures must be addressed, and vulnerable transitions around walls, doors, drains, penetrations, and deck edges must be properly integrated into the waterproofing assembly.

ARC installs both elastomeric and cementitious waterproofing systems.

Elastomeric Deck Waterproofing Systems

ARC specializes in elastomeric pedestrian and vehicular traffic coating systems designed to provide flexible, durable protection against water intrusion, sunlight, weather exposure, and abrasion.

Liquid-applied elastomeric coatings and membrane systems create a continuous waterproof layer while accommodating normal movement of appropriate deck substrates.

A typical system may incorporate substrate preparation, waterproof base materials, reinforcing components, aggregate or sand coats for durability and slip resistance, and protective topcoats designed for continued exterior exposure.

These systems can be particularly well suited to multifamily decks, condominium balconies, exterior corridors, commercial pedestrian areas, and vehicular parking garages.

Cementitious Deck Waterproofing

ARC also installs cementitious deck waterproofing systems, including Pli-Dek and Life Deck systems, over appropriate plywood substrates.

These assemblies combine waterproof membranes, galvanized metal lath, cementitious materials, acrylic components, and protective finishes to create a durable waterproof walking surface. Cementitious systems may also be appropriate where project specifications call for particular fire-resistant or traffic-surface characteristics.

Installation may include preparation and repair of the underlying substrate, installation of a waterproof membrane, galvanized metal lath, flexible polyacrylic or cementitious base coats, reinforcing layers, and acrylic or epoxy finish systems.

ARC can evaluate the existing assembly and project requirements to determine an appropriate waterproofing approach for large commercial and multifamily deck restoration projects.

Dry Rot & Structural Deck Repair

Failed waterproofing can allow moisture to migrate below the visible deck surface and into plywood, framing, joists, walls, and other structural components. By the time deterioration becomes visible from above, damage may extend considerably farther into the assembly.

ARC performs dry rot deck repair and structural reconstruction as part of larger waterproofing and building-restoration projects.

Deteriorated wood can be removed and affected framing, joists, substrates, and adjoining components repaired or replaced as necessary before a new waterproofing assembly is installed.

Because ARC is both a General Contractor and waterproofing specialist, we can coordinate structural deck repairs and waterproofing within a single restoration scope rather than addressing only the visible surface failure.

Large Deck & Balcony Reconstruction

Where deterioration is too extensive for localized repair, ARC can perform partial or complete reconstruction of decks, balconies, walkways, and related exterior assemblies.

Projects may involve structural framing and joist repair, plywood substrate replacement, flashing, drainage improvements, waterproofing assemblies, walking surfaces, coatings, and adjoining wall or building-envelope repairs. ARC also specializes in exterior facade restoration.

ARC also has experience rebuilding deck surfaces using redwood, composite materials, and other project-appropriate systems.

Flashing, Drainage & Building-Envelope Repairs

Deck waterproofing failures frequently originate at transitions rather than in the center of the walking surface.

Water intrusion may occur around sliding doors, windows, walls, drains, penetrations, railings, deck edges, and improperly installed or deteriorated flashing. These conditions can allow moisture to migrate into adjacent walls and structural components even when much of the deck surface remains intact.

ARC evaluates these vulnerable areas and repairs or installs flashing and waterproof transitions as appropriate. Sheet-metal flashing can be incorporated to direct water away from adjoining building components and onto properly waterproofed surfaces.

Our building-envelope experience allows us to coordinate deck waterproofing with related wall repair, stucco, concrete restoration, coatings, painting, and waterproofing work when required.