Above-Grade Building Envelope Waterproofing for High-Rises, Condominiums & Commercial Properties
Commercial Waterproofing Specialists in Los Angeles, CA
Waterproofing a Los Angeles building is a problem of patience rather than volume. Only about fourteen inches of rain fall in a year, and almost all of it arrives in a handful of winter atmospheric-river storms. In between, the sun and the daily swing between marine-layer damp and afternoon heat quietly take the elasticity out of every sealant on the building, while seismic movement works those same joints mechanically. By the time the rain comes, the envelope has already been opened. Then moisture migrates through interior walls, architectural metals corrode, masonry decays, and mineral runoff etches glass, and a building that looked fine in October is a claim in February.
Presto Restoration delivers above-grade commercial waterproofing for high-rise and commercial properties across Los Angeles, from Downtown and Bunker Hill office towers to the mid-rise stock along Wilshire and the creative-office conversions of the Arts District. Our difference is a restoration-first philosophy. Instead of simply caulking over deteriorated surfaces, we clean and restore them before waterproofing, so the finished work performs better and lasts longer. Capabilities include breathable masonry water repellents, silicone and elastomeric coating systems, and expansion joint and crack sealing specified for high movement. In addition, we offer wet glazing and glass sealing backed by our proprietary products such as Glass Defender. We also provide niche solutions like Leach Stop Protection for precast concrete. We work exclusively above grade, not on foundations or below-grade waterproofing, because deep specialization produces stronger outcomes than generalist promises.
OUR COMMERCIAL WATERPROOFING SERVICES IN LOS ANGELES
From joint sealants to full coating systems, Presto’s above-grade waterproofing services for Los Angeles buildings fall into two groups: core systems that keep the building envelope watertight, and specialized restoration-waterproofing services that pair deep cleaning and restoration with lasting protection.
Core Waterproofing Services
Los Angeles concrete high-rises are designed to move, and here they get two reasons to. Daily heat cycling flexes the structure, and seismic activity racks it, and both concentrate at expansion joints, control joints, and cracks in the facade. When the sealant at those movement joints fails, it becomes the fastest path for water to reach the building interior the next time a real storm comes through. We repair and reseal these joints with high-movement silicone and polyurethane systems built to stretch and compress with the building rather than tearing loose. On a Los Angeles building, proper joint sealing is often the single highest-value waterproofing repair available.
Glass on Los Angeles buildings takes a steady chemical beating. Mineral-rich runoff from concrete and masonry above, irrigation overspray drying fast in the sun, traffic pollutants, and the ash that settles after a bad fire season all leave deposits that permanently etch and haze the surface when ignored. Our proprietary Glass Defender treatment bonds a hydrophobic barrier to the glass so minerals cannot anchor, water sheets away instead of drying in place, and routine cleaning becomes easier and less frequent. Treated windows hold their optical clarity year after year.
Ledges, parapets, balcony edges, and other horizontal details are where a Los Angeles winter storm parks its water, and where conventional coatings surrender first. Drainage on much of this building stock was sized for a drier idea of the city, so those surfaces hold water for hours rather than shedding it. For these conditions we install high-performance silicone coating systems: seamless monolithic membranes that bond directly to the substrate and eliminate the laps and terminations where ordinary products fail. Silicone thrives precisely where other coatings die, shrugging off ponding water, sustained UV, and sharp day-to-night thermal swings.
On any commercial tower, the sealant joint between the window glass and its frame is among the first waterproofing components to fail. Once that perimeter seal hardens, splits, or releases, storm water pours straight into the wall cavity. From there, it can travel several floors from the breach before it ever shows up indoors, which is why the stain on the ninth floor so rarely marks the problem. Wet glazing cures it at the source. We remove the spent sealant and install new high-performance silicone that re-establishes a watertight bond between the glass unit and the frame. Presto reglazes storefront, curtain wall, ribbon window, and punched window systems alike, delivering documented, warrantied wet glazing across entire Los Angeles high-rises.
Stucco, EIFS, and concrete walls inevitably develop hairline cracks, and Los Angeles has an enormous stock of all three. Every one of those cracks is a water entry point waiting for the next storm, and the intervening dry months make them easy to ignore. Elastomeric coatings solve this by staying flexible for life: applied at roughly ten times the film thickness of ordinary paint, they stretch across small cracks rather than splitting open themselves. That elasticity matters here, where daily heating and cooling keeps substrates in constant micro-motion and the ground adds movement of its own. Our systems are breathable, letting interior moisture vapor escape, stable under a very high year-round UV load, and available in a complete palette of factory colors and texture profiles.
Porous masonry such as brick, block, precast, and cast stone drinks in water. On a Los Angeles building that shows up as efflorescence streaks after the first heavy storm of the season, accelerated deterioration at parapets and sills, and damp interior walls that dry out again before anyone investigates. Presto applies clear, breathable penetrating repellents built on silane and siloxane chemistry that soak into the substrate and render it hydrophobic without altering its appearance. After treatment the wall looks untouched, but rain beads and rolls off rather than absorbing in. These sealers are invisible once cured and formulated to keep protecting through years of intense UV exposure.
Specialized Restoration-Waterproofing
What makes Presto unique is that we don’t just seal surfaces, we clean and restore them first. This two-step approach produces waterproofing work that looks better, performs better, and lasts longer than standard contractor work. Our specialized restoration-waterproofing services address specific problems that ordinary waterproofing contractors can’t handle.
Precast concrete panels contain water-soluble minerals that leach out whenever moisture works its way through them, and the mineral runoff deposits on the surfaces below as stubborn, permanent-looking staining on windows, metal trim, and other facade elements. These stains are hard to remove and tend to come right back within weeks of cleaning because the source of the leaching was never treated. Our Leach Stop Protection service is a specialized treatment that stops the leaching at its source. We clean the existing staining and treat the precast to block future mineral migration, so buildings that have battled recurring window staining for years can finally get lasting relief.
Architectural metal panels, curtain wall framing, mullions, and Alucobond composite panels take a continual beating from UV exposure, traffic pollutants, and the fine airborne grit that moves through the basin. Instead of pushing for costly panel replacement, we apply protective clear coating systems that seal the metal and preserve the original factory finish. The clear coats bond directly to the existing metal surface and block moisture and contamination from reaching the substrate underneath, meaningfully extending the service life of the original material. This waterproofing approach frequently eliminates the need for expensive replacement projects, and it significantly cuts long-term maintenance costs.
Our Commercial Waterproofing Process in Los Angeles
Every commercial waterproofing project follows a proven five-phase process built to diagnose issues correctly, specify the right systems for your building, and deliver watertight performance that holds up for years.
Building Envelope Inspection
We inspect every above-grade waterproofing system on your building, from sealed joints and coatings to exposed decks and masonry walls, documenting every failure point with photos and detailed notes.
Diagnostic Testing
Water intrusion on Los Angeles buildings often traces back to unexpected sources, and a leak that only appears twice a winter is the hardest kind to chase. Controlled water testing, moisture readings, and visual tracing separate true root causes from surface symptoms.
Scope & Specification
We specify the right products for your substrates, silicones, elastomeric systems, traffic membranes, with clearly quantified line items, while our PM team handles permitting and tenant coordination.
Waterproofing Installation
Our trained crews execute using rope access, swing-stage, or lifts as the building requires. All work is installed to manufacturer specifications with strict quality control and full documentation.
Project Closeout & Warranty
We deliver complete documentation, including warranty information, product data sheets, before-and-after photography, and maintenance recommendations to maximize the life of your new waterproofing systems.
Talk to Us About Waterproofing Your Los Angeles Building
Are you seeing water intrusion, failing sealants, or coating deterioration on your building? Tell us what you are looking at and our specialists will recommend the most cost-effective path forward.
Call 1-800-785-9927 or Request A Free Quote.
Why Los Angeles Property Managers Choose Presto for Commercial Waterproofing
Presto Restoration has been restoring and protecting commercial buildings nationwide for over 25 years. What a Los Angeles waterproofing scope has to answer for is narrower than it looks: joints that spend eight months drying out and one week under load, coatings that must survive a UV dose most markets never see, and drainage details sized long before anyone planned for an atmospheric river. We specify to those conditions, work to the California Building Code, and coordinate permitting through LADBS and the surrounding city departments.
Our Local Los Angeles, CA Support Network
A territory this spread out asks a lot of a single trade. To provide our clients with the most comprehensive care possible, from major structural restoration to ongoing facility upkeep, Presto coordinates with specialized networks covering the same ground.
For routine upkeep and localized facility services, we encourage property managers to explore our sister divisions:
Building Restoration Los Angeles: Targeted repair work on individual assets, inside and out.
Building Maintenance Los Angeles: Routine care that keeps sealants, drains and finishes doing their job.
Building Services Los Angeles: Janitorial, minor repair and facility work on a standing schedule.
Recent Waterproofing Projects in California
CALIFORNIA PORTFOLIO HIGHLIGHTS
A sample of recent commercial waterproofing, caulking, and coating projects Presto has completed for California property owners.
Los Angeles Commercial Waterproofing FAQs
How often should commercial building sealants be replaced in Los Angeles?
Los Angeles is harder on sealant than its rainfall total suggests. A very high year-round UV load breaks the material down chemically while daily thermal cycling and seismic movement work it mechanically, so exposed joints often reach the end of their useful life well before the label says they should. Many products are rated for 15-25 years; on exposed high-rise facades here we routinely see meaningful failure at 10-15, and sooner on south and west elevations. A full building envelope inspection every 5 years, ideally in autumn before the wet season, is the best way to catch it early.
What's the difference between waterproofing and water damage restoration?
Waterproofing is preventative: it stops water from getting into the building in the first place through properly installed sealants, coatings, and membranes. Water damage restoration happens after the fact, cleaning up and repairing damage once water has already gotten in. Presto’s focus is on the preventative side, restoring and maintaining the exterior systems that keep water out of the building envelope, which is almost always more cost-effective than repeatedly remediating interior damage.
Can waterproofing be done on an occupied commercial building?
Yes, and most of our projects happen on fully occupied buildings, from office towers and hotels to condominiums and hospitals. We rely on industrial rope access wherever possible instead of scaffolding, schedule the noisier work outside peak hours, keep tenants informed throughout the project, and phase the work so common areas and daily operations stay accessible.
What's the difference between elastomeric coatings and regular exterior paint?
Standard exterior paint is built mainly for looks, offering color and light weather resistance, but it will not stretch with the building or bridge cracks. Elastomeric coatings are waterproofing systems that also happen to look good: they go on far thicker than paint, flex with thermal movement in the substrate, and bridge hairline cracks so water cannot work its way through. In Los Angeles that flexibility does double duty, because the substrate is moving for two reasons rather than one, and the coating also has to hold its color under sun for most of the year.
How do I know if my building needs waterproofing now or can wait?
Warning signs that call for immediate attention include cracking or separation in joint sealants, dark streaking running down exterior walls near failed joints, efflorescence (white mineral deposits) on masonry or concrete, damp spots or bubbling paint on interior walls, coatings that are chalking, peeling, or fading beyond normal wear, and any visible concrete spalling or exposed rebar. If you are seeing any of these, the longer you wait the more expensive the fix becomes, and in this city the deadline is the first serious storm of the winter. Tell us what you are seeing and we will scope exactly what is needed and help you prioritize.
Does Presto handle permits and local regulations in Los Angeles?
Yes. Our project management team handles permit applications directly, including any required design review submissions, and works with the Los Angeles Department of Building and Safety as well as the building departments of Glendale, Burbank, Pasadena, Santa Monica, Culver City, West Hollywood and Inglewood. Where a property is a designated Historic-Cultural Monument or falls inside an HPOZ, material selection has to satisfy the Office of Historic Resources, and we specify accordingly rather than discovering it late. Presto carries nationwide general liability and workers’ compensation insurance and complies with all applicable local and state requirements on every project.
Other Los Angeles Building Restoration Services
Keep Water Out of Your Los Angeles Building
Don’t wait until a small sealant failure turns into a costly water damage claim. In Los Angeles the gap between the two is usually one winter storm, and the repair is far cheaper on the near side of it.
Call us today at 1-800-785-9927 or click Request A Quote.