Commercial Waterproofing in West Los Angeles
Commercial waterproofing seals the balconies, walkways, decks, roofs, walls and foundations of apartment buildings, condos and commercial property so water stops getting in. You need it when leaks keep returning after rain or spread from unit to unit. Absolute Maintenance & Consulting provides commercial waterproofing for HOA boards, property managers and building owners in West Los Angeles, Culver City and nearby communities, as part of our commercial restoration and waterproofing work.
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What Commercial Waterproofing Involves
Commercial waterproofing involves three jobs: finding where water enters the building, repairing what failed and sealing that surface so the leak doesn’t come back. It uses the same systems as our residential waterproofing work. The difference is scale: one failed surface can wet several units, and every repair needs sign-off from an owner or board.
Balconies, Walkways, Decks and Roofs
Balconies, elevated walkways, decks and roofs are the shared, exposed surfaces where many multi-unit leaks start. Water often gets in where these surfaces meet something else: the wall, a door threshold, a railing post or the deck edge. Watch for worn coatings, rust at railing posts and stained ceilings below. Our balcony waterproofing work covers multi-unit balconies and walkways, and roof waterproofing covers the flat and low-slope roofs common on apartment and commercial buildings.
Stucco Walls and Windows
Stucco walls let water in through cracks and worn flashing around windows and doors, especially in wind-driven rain. We seal the cracks, repair the flashing and waterproof the wall.
Foundations and Below-Grade Areas
Foundations and basement walls take water from wet soil, and groundwater pressure can push it through cracks in the concrete. Damp walls and white mineral deposits (efflorescence) show where water gets through. We waterproof the concrete where the building meets the ground, which protects below-grade parking and storage.
Our Commercial Waterproofing Process
The process has five steps: inspect the building, trace leaks across units, document the findings, repair and waterproof what failed, then verify the result.
1. Building Inspection
We inspect the building’s exterior and the affected units with thermal imaging and moisture meters, without opening walls.
2. Tracing Leaks Across Units
We follow the water from the unit where it shows up back to the balcony, roof or wall where it enters. A ceiling stain in one unit often starts at the balcony or walkway of the unit above. When readings alone can’t prove the entry point, water testing does. Water testing is priced separately and isn’t credited toward the work.
3. Documentation
You get photos, moisture readings, written findings and a scope of work that owners, boards and insurers can review before any repair starts. When the cause of a leak is disputed, insurance adjusters, public adjusters and attorneys use our forensic leak detection and ASTM E1105 water testing reports.
4. Repair and Waterproofing
We repair the failed entry points, then install a membrane or coating matched to each surface. We schedule the work around tenants and building operations.
5. Final Verification
Every job closes with a moisture recheck in the affected units and a written record of the work.
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How Much Does Commercial Waterproofing Cost?
Commercial waterproofing costs $3,000 to $150,000+, depending on the size of the project.
| Project size | Project area | Price range |
| Medium | 3,000 to 10,000 sq. ft. | $3,000 to $10,000 |
| Large | 10,000 to 50,000 sq. ft. | $10,000 to $50,000 |
| Large waterproofing project | Set by the scope | $50,000 to $150,000+ |
The inspection is priced separately, and water testing isn’t included in it:
- Multi-Unit / Larger Property Inspection: $975 to $1,500, for up to 5 units or properties, 3,500 to 10,000 sq. ft.
- Water Intrusion Testing: $1,275 to $1,850+
- Complex Water Testing: $1,950 to $2,600+
Multi-Unit / Larger Property Inspection fees and water testing fees are not credited toward the work. A leak confined to one unit can start with a Basic or Detailed Inspection instead. When we do the work, the fee for a Basic or Detailed Inspection is credited toward the cost of the work. Your final price comes in a written estimate after the inspection.
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Why Choose Absolute for Commercial Waterproofing?
Property managers and HOA boards hire us as their commercial waterproofing contractor because one company finds the source, documents it and does the repair. Nobody has to coordinate a separate inspector, tester and applicator.
We Find the Entry Point First
Finding and repairing leaks from exterior sources is our specialty, so we waterproof the surface that’s actually letting water in instead of recoating everything near the stain. Our founder, Cameron Figgins, has more than 30 years of hands-on experience finding complex water intrusion issues.
Licensed, Certified and Proven on Large Projects
We’re a licensed California contractor (CSLB #998184), an IICRC-certified firm (#70018676) and a MICRO Certified Firm. Our large-project experience includes a $1.2 million project at San Francisco State University.
Related Services
A leak investigation comes before commercial waterproofing. Our commercial leak detection and water intrusion work finds the source of active leaks across units. If tenants already have wet units, commercial water damage restoration dries and repairs them while the waterproofing is planned.
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Commercial Waterproofing FAQs
Do you provide condo and HOA waterproofing?
Yes. Absolute Maintenance & Consulting waterproofs condo buildings, HOA communities, apartment complexes and other multi-family buildings across West Los Angeles and Culver City. We work with the board or property manager, trace the leak to its source and deliver a written scope of work before any repair starts.
Can you work while tenants are in the building?
Usually, yes. Most of the work happens on roofs, balconies, walkways and exterior walls, outside the units. When we need to get into a unit, we schedule it through the property manager. We plan work in shared areas so residents know what to expect and when.
Who pays for a leak that moves between units?
That depends on your governing documents and your insurance, so we don’t make that call. What we provide is evidence: where the water enters, which part of the building failed and what the repair involves. Boards, managers and adjusters use that record to decide who pays for each repair.
Do you waterproof the whole building or just the leak?
We waterproof the surfaces that failed, and the inspection decides how far that goes. Sometimes the fix is one balcony or one section of roof. When testing shows the same failure across many balconies or walls, we scope them together, so the board can plan one project instead of a string of patches.
Still have questions? Our experts are here to help.