Commercial Roofing in Los Angeles

Commercial Roofing Services in Los Angeles

The commercial roofing industry routinely pushes full tear-off replacements on property owners who don’t need them. It’s the most expensive path, causes the most operational disruption, and it’s often unnecessary.

HP Roofing Pro takes a different approach. We specialize in commercial and industrial roofing across the LA area, from warehouses and retail centers to medical offices and apartment complexes. We assess your roof honestly and recommend the most cost-effective solution, whether that’s a targeted fix, a restoration with our seamless cool-roof system, or a full replacement when it’s genuinely warranted. We can do all three, and we’ll tell you which one your roof actually needs.

Free roof inspections are available anywhere in Los Angeles County, and our emergency crews can typically stabilize active water intrusion the same day.

📞 Call 909-521-1285 for a free, honest commercial roof assessment.

Request a Free Inspection →

Repair, Restore, or Replace?

Water doesn’t run off a nearly level commercial roof the way it sheds off a pitched one. It sits, finds the lowest point, and works into any opening it can reach. That’s why the first job is finding where water is actually getting in, not where it shows up on the ceiling below.

On the commercial roofs we inspect across the region, water intrusion almost always traces back to a short list of failure points:

• Seams and laps between membrane sheets, where adhesion or welds have let go
• Flashings and terminations at parapet walls, curbs, and edges, the transitions that move the most
• Penetrations around pipes, vents, conduit, drains, and HVAC curbs, the busiest part of any commercial roof
• Ponding areas where standing water sits after a storm and slowly breaks the membrane down
• Prior patch jobs that trapped water or blocked drainage and created the next problem

We locate the source, document it with photos, and make a durable fix rather than chasing the stain. For an active problem today, our emergency commercial roof repair crews typically stabilize it the same day and return for the permanent fix.

Left alone, a failing commercial roof can lead to moisture penetration, mold growth, high utility costs, and safety hazards for the people inside. The honest decision after an inspection is always one of three paths.

When a Targeted Fix Is Enough

A targeted fix makes sense when the failure is localized and the rest of the roof has life left. Most problems, including flashing failures, ponding water, and membrane punctures, can be fixed without replacing the entire roof. We use a reinforced 3-course system, explained below, so the patch holds instead of reopening after the next heat wave.

When Roof Restoration Makes Sense

Restore with a cool-roof coating system when the membrane is aging but the deck is sound. It’s a practical middle solution. Fixing or restoring a roof before replacing it extends its useful service life and defers the capital expense of a new roof.

When Roof Replacement Is Necessary

We treat replacement as a last resort. When the deck is structurally compromised, moisture has saturated the insulation across the field, or the system has already been overlaid to the limit, no restoration or patch will save it. In those cases, a commercial roof replacement is the correct call.

Replacement may require removing the existing membrane down to the deck. We handle the full scope: tear-off and disposal, substrate and deck restoration, and a new commercial roofing system specified for your facility and budget.

What sets our replacement work apart is that we only get there after an honest assessment rules out the less expensive paths. Many LA facility managers arrive expecting a tear-off because that’s what another contractor quoted, and leave with a documented fix or restoration at a fraction of the investment.

Not sure which path your roof needs? Our breakdown of when to repair vs replace walks through the decision the same way we’d assess it on your roof.

Commercial Roofing Systems We Service

Commercial roofing contractors commonly install TPO, PVC, EPDM, and modified bitumen systems on flat and low-slope roofs. We inspect, fix, restore, and replace all of them, plus the older assemblies still common across LA:

• TPO, a heat-welded single-ply membrane that resists UV, ozone, and chemical exposure. TPO roofs have a lifespan exceeding 20 years. We handle seam failures, punctures, and UV degradation.
• PVC, heat-welded and highly resistant to grease and chemicals, which makes it common on restaurants and food facilities. We handle weld failures, shrinkage, and flashing resealing.
• EPDM, a synthetic rubber membrane that is simpler to install, maintain, and patch than many commercial systems. We handle patching and touch-ups.
• Modified bitumen, blister fixes, cap sheet replacement, and seam reinforcement.
• Built-up roof (BUR), traditional hot-mopped layers of asphalt and felt applied over wood, concrete, steel, or foam insulation, usually finished with a gravel or cap sheet top layer. It’s common on LA’s older warehouses.
• Metal roofs, fastener replacement, sealing separated seams, and sectional panel work.
• Restoration systems, our reinforced, reflective system installed over sound existing roofs.

Our patches use the highest-grade roof mastic reinforced with polyester fabric. They’re permanent and backed by our guarantee.

If your LA warehouse, retail center, or office has water coming through the ceiling, call before you assume you need a new roof. You probably don’t.

Common Commercial Roof Problems We Fix Across LA County

After thousands of commercial roofs, the same failures show up again and again. Most don’t require a new roof, just an honest diagnosis and the right flat-roof repair:

• Ponding water and drainage failures, sections that hold water long after a storm, accelerating membrane breakdown and adding dead load to the structure
• Membrane blistering and delamination, trapped moisture and failed adhesion lifting the membrane off the substrate
• Flashing failures around HVAC units, the leading source of water intrusion on commercial roofs, where rooftop penetrations and equipment curbs meet the field membrane
• Damage from previous bad patch jobs, stacked layers of failed mastic that trap water and block the roof’s drainage
• Metal roof panel failures, corroded fasteners and separated seams we address with targeted sectional repair instead of a full tear-off

Caught late, commercial roof damage can disrupt operations, harm interiors, and turn a small fix into a costly one.

Why Temporary Patches Fail Under the Southern California Sun

Here’s a common trap. Water shows up on the ceiling, a contractor arrives with a bucket of asphalt mastic, the kind you can buy at any hardware store, and spreads it over the wet membrane. It looks fixed. For about three to six months.

Then the Southern California sun does what it does. UV exposure dries the mastic out, it cracks, and the water comes right back. So someone applies another coat. Then another. Each layer adds height and blocks the roof’s natural slope, creating the exact ponding water that drives the next failure. You don’t end up with a fixed roof, you end up with a growing stack of failed patches.

HP Roofing Pro’s standard is simple: we never apply material over a wet membrane. A patch needs a dry surface to bond to and a reinforcement layer to hold it in place. Think of it like patching drywall: smear compound over a crack with no tape and it telegraphs back through. The tape is what makes it permanent, and polyester fabric is that tape for your roof. That’s why we use a 3-course system: dry and prep the area, apply a base coat, embed a polyester reinforcement fabric, then seal it with a topcoat. The reinforcement gives the patch structural integrity so heat and gravity can’t pull it apart.

The difference is measured in years, not months. A proper 3-course fix holds for 5+ years, while a hardware-store patch rarely survives the next heat wave. If water is coming in right now, our emergency roof repair crews can stabilize it the same day and return for the permanent fix.

Our Roof Inspection and Project Process

We built our process around how commercial facilities actually operate: occupied, busy, and unable to shut down for a roof.

Condition Assessment

Every job starts with a free roof assessment, not a sales pitch. We schedule a same-week site visit and assessment anywhere in LA County, and your written assessment is specific to your roof.

Written Options and Pricing

You receive a documented scope with photos and written pricing for every viable path, whether that’s a fix, restoration, or replacement. It’s useful for budgeting, for your records, and for insurance claims after a storm.

No unnecessary tear-offs: if your roof can be saved with a targeted fix or our seamless coating system, that’s what we’ll recommend. We don’t manufacture reasons to replace a roof that still has years in it.

Scheduling and Installation

We schedule the work around your operations and coordinate with your facility manager from the first day of work to the final walkthrough.

From the first call to the finish, you’ll always know what’s happening on your roof and why. No surprise change orders, no vague invoices, just a clear scope, a fair price, and workmanship that holds up. That transparency is a big part of why managers call us back for their next building and refer us to the ones next door.

Safety and Keeping Your Operations Running

Commercial roofing happens above people who are still working. We work in sections around your operations using scheduled access windows, flags, and cones, so your tenants and staff keep working. No shutdown required.

Our crews leave the work area tidy every day.

Cool-Roof Restoration for LA Commercial Facilities

When a roof needs more than a fix but doesn’t warrant a full tear-off, HP Roofing Pro installs a seamless, reflective restoration system directly over the existing roof.

How the restoration system works:

The system has three engineered components:

1. Waterproofing-grade asphalt base, seals and bonds to the existing roof substrate
2. Stitch-bonded polyester reinforcement, engineered to provide structural integrity and puncture resistance across the membrane
3. Two-phase acrylic elastomeric reflective surfacing, a cool-roof finish designed to reflect solar heat, lower interior temperatures, and meet Title 24 energy standards

The system goes on over your existing roof: no tear-off, no disposal, and no exposing your interior to the elements during construction. That means less downtime and a lower overall investment. Restoration systems come with 20 to 30 year warranties.

Restoration vs. Full Roof Replacement for LA Warehouses

For LA’s warehouse stock, especially in Vernon, Commerce, and the Alameda Corridor, restoration often beats a full single-ply tear-off:

When full replacement is genuinely necessary (structural deck failure, extensive moisture saturation, or a roof that’s already been overlaid multiple times), we handle that too. We just won’t recommend it when you don’t need it.

Los Angeles Codes, Weather, and Energy Requirements

LADBS Permits and Inspections

Within the City of Los Angeles, reroofing work is permitted and inspected through the Department of Building and Safety (LADBS). Other municipalities in the county, and unincorporated areas, go through their own permitting offices.

Title 24 Cool Roofs

California’s Title 24 energy code requires most new commercial roofs, and reroofing jobs above a size threshold, to meet cool-roof standards for minimum aged solar reflectance and thermal emittance. White single-ply membranes and reflective restoration systems can meet those values when the correct product is specified. A cool roof can lower rooftop temperatures and cooling loads, but real energy savings depend on insulation, how the space is used, and your HVAC equipment, so treat them as likely rather than guaranteed.

Heat, UV, and Wind

LA roofs face intense summer heat, constant UV, seasonal weather swings, and steady environmental wear. Inland valleys bake through hot summers, winter storms can bring sudden downpours, Santa Ana winds drive uplift at roof edges and loose flashings, and near the coast, humidity and salty air speed up corrosion on metal components. These stresses are why system selection and attachment matter for long-term durability.

Additional Services

Preventive Maintenance

Regular professional inspections and proactive upkeep extend roof lifespan by 10-15 years and prevent the emergency calls that disrupt tenants and operations. We provide documented inspection reports, following a thorough 12-point inspection checklist, plus upkeep schedules for facility managers.

Skylight Removal & Installation

Commercial skylights typically hold up for 10-15 years before turning brittle and letting water in. We handle removal, replacement, and weatherproofing to current codes.

Solar Panel Roofing

LA gets 284 days of sunshine annually. We prepare commercial roofs for photovoltaic systems with structural assessment, membrane evaluation, and coordination with solar installers. A restoration system can serve as the foundation for a solar-ready roof.

Why Facility Managers Choose Our Roofing Company

• Honest Assessment, we tell you what your roof actually needs, not what generates the biggest invoice
• Full Capability, fix, restore, or fully replace, we do all three
• California Licensed & Insured, Contractors State License Board (CSLB) #1043546, fully bonded for commercial work
• Manufacturer Certified, Owens Corning Preferred Contractor, GAF CoatingsPro, Mulehide Warranty Eligible
• 20-30 Year Warranties, backed by documented inspection standards
• Title 24 Compliant, all systems meet current energy efficiency standards
• U.S. Green Building Council Member, Energy Star-approved contractor

The Team Behind the Work

Every assessment and job is handled by our own licensed team working out of our Alhambra headquarters, not subcontracted franchise crews. Our GAF CoatingsPro and Owens Corning Preferred Contractor credentials make us eligible to issue manufacturer-backed warranties on qualifying installs. Our founder, Jeff Lim, previously managed federal commercial property portfolios with the GSA.

Recent LA-Area Project: Historic Barrel-Vault Roof, Downtown LA

One recent example: a roughly 4,000-square-foot historic bowstring barrel-vault roof at 441 S Los Angeles St in downtown LA. The existing built-up roof had worn out on the surface, its reflective granules wearing away and the asphalt waterproofing beneath deteriorating, but the structure was sound and the drainage was good. That made it a strong candidate for restoration rather than a tear-off. Working around the tight access of a busy downtown block, we restored the roof with a high-reflectivity acrylic cool-roof system focused on waterproofing and surface renewal, with the bright white surface reflecting sunlight to keep the roof cooler in a dense urban core. Read the downtown LA barrel-vault case study →

What Our Clients Say

“When HP Roofing Pro showed up to replace my roof, I was thoroughly impressed with how efficient, clean, and professional their crew was. If you are looking for a knowledgeable roofing business with honesty, integrity, and does great work, look no further!” , Gary S., President, North County Credit Union

“I would like to thank you again for the hard work you and your team have put into the successful completion of our Roof Project. Your strong attention to keeping and improving the schedule is the major reason for the timeliness of completion.” , H. Potter, Engineer

Los Angeles Service Area

Commercial roof problems are time-sensitive. The longer water sits, the worse it gets, so we respond quickly across the region. We serve commercial properties throughout Los Angeles County, including:

If you are a property manager searching for a commercial roofing contractor or roof maintenance company near you, here is the honest picture: HP Roofing Pro runs from a single headquarters at 601 S Palm Ave in Alhambra, and our crews travel out from there to jobs across the LA area every week. We are not a chain with a storefront in every neighborhood. We are one accountable crew covering downtown LA, the eastern suburbs, the eastern corridor, and the wider LA Basin from one location. That keeps quality and scheduling consistent on every roof.

Industrial Corridor: Vernon, Commerce, City of Industry, Alameda Corridor, Downtown LA

San Gabriel Valley: Alhambra (HQ), Pasadena, El Monte, West Covina, Monterey Park, Rosemead, San Gabriel, Arcadia, Temple City, Baldwin Park, Azusa, Covina, Irwindale

Greater LA: East Los Angeles, South Pasadena, Montebello, Glendale, Burbank

Extended Coverage: Orange County, the Inland Empire, and San Diego County

View all service area pages →

Request a Commercial Roof Assessment

If water is coming in now: call 909-521-1285. We typically get a crew out the same day to stabilize the roof, then return for the permanent fix.

If you’re planning ahead: submit details about your roofing needs or request a free estimate at estimate.hproofingpro.com. You’ll receive a documented scope with photos and written pricing for each viable path.

Not sure we cover your area? We serve all of LA County, and the full list of cities and counties we cover is above.

About Our Roofing Company

HP Roofing Pro was established in 2018 and has grown into one of California’s most trusted commercial roofing contractors. We assess honestly, fix when possible, restore when a roof needs more than a fix, and replace only when it’s genuinely necessary.

Every job begins with a free documented inspection.

HP Roofing Pro 601 S Palm Ave, Alhambra, CA 91803 📞 909-521-1285 · info@hproofingpro.com CSLB #1043546

Learn more about HP Roofing Pro →

Frequently Asked Questions

Does my roof need a targeted fix, restoration, or full replacement?

It depends on what the inspection finds. A localized failure usually needs a targeted fix. An aging but structurally sound membrane is a candidate for restoration. Saturated insulation, deck failure, or multiple prior overlays point to replacement. Our written assessment covers every viable path so you can compare them.

How does restoration pricing compare to a full tear-off?

A restoration typically costs significantly less than a full tear-off. It avoids tear-off labor and disposal, installs over the existing substrate, and is generally expensed rather than capitalized. We assess every roof individually and give you written pricing for both paths so you can compare them directly.

How quickly can an active leak be contained and permanently fixed?

For active water intrusion, we typically get a crew out the same business day to stabilize it. We then return for the permanent fix. Our standard hours are Monday through Friday, 7:00 am to 4:30 pm, and after-hours requests are answered the same business day.

Which commercial roof systems can you inspect, fix, restore, and replace?

We work on TPO, PVC, EPDM, modified bitumen, BUR, metal roofs, and reflective restoration systems.

How do I find a reliable commercial roofer near me?

The best starting point is confirming the contractor holds a current California C-39 roofing license. Ours is CSLB #1043546, and we are licensed, insured, and bonded. Beyond licensing, look for a contractor with real commercial experience who assesses honestly rather than defaulting to the most expensive path. Call 909-521-1285 to schedule a free assessment.

What warranty do you offer?

We offer leak-free warranties ranging from 20 to 30 years, depending on the roofing system selected. Warranties are transferable to a new owner with notification of an ownership change. Our GAF CoatingsPro and Owens Corning Preferred Contractor credentials also make us eligible for manufacturer-backed warranties on qualifying installs.

Are you a local contractor or a national franchise?

HP Roofing Pro is a local, family-owned company headquartered in Alhambra at 601 S Palm Ave. We are not a franchise or a national chain with offices across the United States, and there are no subcontracted franchise crews.