Deck & Balcony Waterproofing Projects

Westcoat ALX and MACoat systems, membrane replacements, and drainage corrections that stop water before it reaches the framing — project by project.

15+ Years Experience
1,000+ Inspections Done
700+ Properties Served
100% Compliance Rate
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Featured Case Studies

Every project below is real work by our in-house crew — inspected, repaired, and signed off under one license. Filter by service to see how we handle jobs like yours.

Balcony door threshold opened up during SB 721 leak repair at a Tracy apartment building
SB 721 Inspection Structural Repair Waterproofing

Tracing a Ceiling Leak to a Failed Balcony Threshold — SB 721 Repair in Tracy

Tracy, CA

A ground-floor tenant in Tracy reported ceiling stains that three previous service calls had failed to explain. The water was coming from the balcony above, through a door threshold that had never been pan-flashed. We rebuilt four thresholds in seven working days.

  • SB 721 inspection of all 36 balconies
  • Leak tracing with moisture mapping & hose testing
  • Door removal & threshold framing replacement (4 balconies)
  • Sheet-metal pan flashing with end dams & rear upturn
Mid-rise condominium balconies at Lake Merritt, Oakland, during an SB 326 inspection
SB 326 Inspection Structural Repair Waterproofing

SB 326 Inspection and Balcony Membrane Replacement for a Lake Merritt Condominium

Oakland, CA (Lake Merritt)

A 62-unit Oakland mid-rise needed its first Civil Code §5551 inspection before a refinance. Our engineer-led survey found two balconies with active moisture in the framing — repaired, documented, and closed out without a special assessment.

  • Engineer-led SB 326 inspection & sampling plan
  • Visual assessment of all 62 balconies
  • Nine exploratory openings with multi-day moisture logging
  • 15-day immediate-threat notice & access restriction
Townhome-style condominium balconies under SB 326 inspection in Woodland, CA
SB 326 Inspection Waterproofing

SB 326 Inspection on an Insurance Deadline for a Woodland Townhome Association

Woodland, CA

A Woodland association's carrier made a completed structural inspection a condition of renewal, with five weeks' notice. We assessed 54 elevated elements, closed out every finding, and delivered the certified report inside nineteen days.

  • Engineer-led SB 326 inspection of 54 balconies, walkways & landings
  • Six exploratory openings with three-day moisture logging
  • Coating replacement on 7 balconies
  • Scupper extension & flashing correction
Townhome community decks in Rocklin, CA during SB 721 waterproofing reconstruction
SB 721 Inspection Structural Repair Waterproofing

SB 721 Inspection and Deck Coating Rebuild for a Rocklin Townhome Community

Rocklin, CA

An owner preparing a 32-unit Rocklin community for sale ordered an SB 721 inspection. The statutory 15% sample turned up moisture behind the fascia, so we inspected all 32 decks — and rebuilt the coating system before the damage reached the framing.

  • SB 721 inspection — 15% sample expanded to 100%
  • Coating removal & substrate assessment
  • Rim joist and ledger replacement on 4 decks
  • Westcoat ALX multi-layer waterproofing (32 decks)
Hillside condominium buildings with cantilevered balconies in El Dorado Hills, CA during SB 326 repair
SB 326 Inspection Structural Repair Waterproofing

SB 326 Inspection and Cantilever Repair for a Hillside Condominium in El Dorado Hills

El Dorado Hills, CA

Tight stucco soffits hid years of decay in the cantilevered joists of a 40-unit hillside condominium. An SB 326 inspection found it, five bays were rebuilt with a vented soffit detail, and the association closed out its nine-year cycle.

  • Engineer-led SB 326 inspection of 40 balconies
  • Eight exploratory soffit and deck openings
  • Shoring and cantilever joist replacement (5 bays)
  • Vented soffit reconstruction

Your Property Could Be Next

From SB 721 and SB 326 inspections to full reconstruction — we handle it all in-house. Get a free compliance check for your property today.

Free Compliance Check Call 916-269-5277
CSLB #1060736 Mon-Fri 8am-6pm, Sat 9am-4pm

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