🎉 LIMITED TIME Get $500 OFF Any Roof Replacement + FREE Inspection  |  Call Our 24/7 Virtual Assistant: (209) 720-3124
TopCal Roofing — aerial view of clay tile roof installation in Southern California
🏆 San Gabriel Valley's Top Roofing Company 2025

California's Most Trusted
Roofing Experts

Serving Los Angeles County homeowners and businesses for 17+ years. Owens Corning Preferred Contractor. Licensed, insured, and backed by 5‑star reviews across every platform.

Lic. #1112937
5-Star Google Rating
24/7 Emergency
Owens Corning Preferred
🔥 Limited Time: $500 OFF Any Roof Replacement

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No obligation. Same-day response guaranteed.

🔒 Your info is private. No spam, ever. Or call us directly at (209) 720-3124

17+Years · Res. & Commercial
500+Roofs Completed
5★Google Rating
24/7Emergency Service

Why Property Owners Choose TopCal

Industry-recognized, community-trusted — the credentials that set us apart from every other roofer in Los Angeles County.

🏆 Top Roofing Company 2025

Named San Gabriel Valley's Best Roofing Company for 2025 — recognized for excellence in craftsmanship, service, and customer satisfaction.

Owens Corning Preferred Contractor

Certified by Owens Corning — North America's largest roofing manufacturer — meaning access to enhanced warranties and the highest-quality materials available.

CSLB Licensed & Insured

Fully licensed by the California State License Board (#1112937) and fully insured — protecting your property and your investment from day one.

5-Star Rated Across Platforms

Top-rated on Google, Yelp, Angi, BBB, Thumbtack, and BuildZoom. Over 500 completed projects with an unblemished 5-star reputation.

Owens Corning Partner

Certified Owens Corning contractor, giving customers access to premium roofing systems and exclusive manufacturer warranties on every installation.

Malarkey Certified Installer

Authorized Malarkey installer — delivering industry-leading shingles with superior wind resistance, impact rating, and environmental performance.

Residential & Commercial
Roofing Services

Whether you own a single-family home or a large commercial complex, TopCal delivers expert roofing solutions for every property type — on time and on budget.

Residential Roofing

Complete solutions for single-family and multi-family homes — new installs, re-roofing, full replacements, and repairs using Owens Corning premium shingles.

Get Instant Estimate

Commercial Roofing

TPO, EPDM, torch-down, and coatings for offices, retail centers, warehouses, HOAs, and industrial buildings — engineered for longevity with minimal disruption.

Request Commercial Quote

Roof Replacement

Full roof tear-off and replacement using premium materials. We handle all permits, disposal, and leave your property spotless after every job.

Get Free Quote

Roof Repair & Maintenance

Expert diagnosis and repair of leaks, damaged flashing, cracked tiles, and structural issues — preserving your roof and preventing costly damage.

Get Free Quote

Solar-Ready Roofing

Future-proof your home with a solar-ready roof installation — reinforced decking, upgraded flashing, and optimized layout for maximum solar output.

Get Free Quote

Emergency Roof Repairs

Storm damage? Active leak? We provide 24/7 rapid-response emergency service across all of LA County — same-day inspections available.

Call Now 24/7

Every Roof Type,
Expertly Installed

TopCal installs every major roofing system — from Owens Corning architectural shingles for homes to TPO, torch-down, and EPDM flat-roof systems for commercial properties. Every install meets manufacturer specs and comes backed by a workmanship warranty.

Residential Commercial
Residential

Asphalt Shingle

The most popular roofing material in California — asphalt shingles offer an unbeatable combination of affordability, durability, and curb appeal. Available in architectural (dimensional) and 3-tab styles in dozens of colors.

  • Lifespan: 20–30 years
  • Impact-resistant options (Class 4)
  • Owens Corning, Owens Corning & Malarkey brands
  • Best value for residential roofs
Residential

Concrete & Clay Tile

A signature of Southern California architecture — clay and concrete tiles provide unmatched longevity, natural insulation, and a timeless Mediterranean or Spanish-style aesthetic ideal for LA County homes.

  • Lifespan: 40–50+ years
  • Fire-resistant (Class A rated)
  • Naturally insulating — lowers energy costs
  • Perfect for California climate
Commercial

TPO (Thermoplastic Polyolefin)

The industry's leading single-ply flat roofing membrane — TPO offers outstanding UV resistance, heat-welded seams for superior leak protection, and ENERGY STAR® compliance for commercial buildings in California.

  • Lifespan: 15–25 years
  • ENERGY STAR® certified — reduces cooling costs
  • Heat-welded seams — zero leak points
  • Ideal for flat & low-slope roofs
Commercial

Torch Down (Modified Bitumen)

A durable, heat-applied roofing system for flat and low-slope roofs — torch-down (modified bitumen) creates a seamless, waterproof membrane that handles the thermal expansion of California's hot summers exceptionally well.

  • Lifespan: 15–20 years
  • Seamless — eliminates leak-prone seams
  • Superior UV & heat resistance
  • Excellent for flat commercial roofs
Residential & Commercial

Picture Framing

A specialized flat-roof finishing technique where a raised perimeter border frames the roof edge — creating a clean, architectural look while reinforcing waterproofing at the most vulnerable edge sections of the roof.

  • Enhanced waterproofing at roof edges
  • Architectural, finished appearance
  • Combined with TPO or Modified Bitumen
  • Ideal for commercial & modern residential
Commercial

Flat Roof Systems (EPDM)

EPDM (ethylene propylene diene monomer) is a premium rubber roofing membrane widely used on commercial flat roofs. Highly resistant to ozone, UV rays, and temperature extremes — making it ideal for year-round California conditions.

  • Lifespan: 20–30 years
  • Ozone & UV resistant
  • Low maintenance requirements
  • Excellent for large commercial buildings
Residential & Commercial

Metal Roofing

Modern metal roofing systems — including standing seam and metal shingles — deliver unparalleled longevity, fire resistance, and energy efficiency. Increasingly popular for both upscale residential properties and commercial applications in California.

  • Lifespan: 40–70 years
  • Class A fire rating
  • Reflects solar heat — reduces AC costs
  • 100% recyclable material
Commercial

Roof Coatings & Restoration

Extend the life of an existing roof by 10–15 years with a professional elastomeric or silicone coating system — a cost-effective alternative to full replacement that meets California Title 24 cool-roof energy requirements.

  • Extends roof life 10–15 years
  • Meets CA Title 24 energy standards
  • Reduces building cooling costs 20–30%
  • Most cost-effective option available
Residential

Wood Shake & Cedar Shingles

Classic wood shake and cedar shingles offer a natural, rustic aesthetic that complements craftsman and bungalow-style homes throughout Pasadena and the San Gabriel Valley — with proper fire treatment meeting California building codes.

  • Lifespan: 20–30 years with maintenance
  • Fire-treated to meet CA code
  • Natural insulation properties
  • Perfect for craftsman-style homes

Expert Commercial Roofing
for Every Building Type

From small retail storefronts to large industrial complexes, TopCal delivers commercial roofing systems engineered for maximum durability, energy efficiency, and minimal business disruption — on schedule and on budget.

Most Popular

TPO Membrane

Single-ply thermoplastic membrane — the #1 commercial flat roofing choice in California. Heat-welded seams create a fully monolithic waterproof layer with ENERGY STAR® compliance.

  • Lifespan: 15–25 years
  • Reflects UV — lowers AC costs up to 30%
  • Heat-welded seams — zero leak points
  • Ideal for flat & low-slope roofs
  • Title 24 & ENERGY STAR® compliant

Torch Down / Modified Bitumen

A battle-tested, heat-applied asphalt system ideal for flat and low-slope commercial roofs. Creates a seamless, high-tensile waterproof membrane that handles California's thermal expansion exceptionally well.

  • Lifespan: 15–20 years
  • Seamless application — no weak joints
  • Exceptional UV & heat resistance
  • 2-ply & 3-ply system options
  • Cold-applied option available (fire sensitive areas)

EPDM Rubber Roofing

Premium ethylene propylene diene monomer (EPDM) rubber membrane — highly resistant to ozone, UV, and extreme temperatures. The go-to solution for large commercial flat roof surfaces.

  • Lifespan: 20–30 years
  • Ozone & UV resistant
  • Handles extreme temperature swings
  • Low maintenance over entire lifespan
  • Excellent for large building footprints

Roof Coatings & Restoration

Extend the life of an existing commercial roof by 10–15 years without a full tear-off — saving 40–60% vs. replacement. Silicone, acrylic, and polyurethane coatings restore waterproofing and reflectivity.

  • Saves 40–60% vs. full replacement
  • Extends roof life 10–15 years
  • White reflective coating — reduces heat gain
  • No tear-off — zero landfill waste
  • Silicone, acrylic & polyurethane options

Metal Roofing

Standing seam and corrugated metal systems for commercial and industrial buildings — delivering a 40–70 year lifespan, fire resistance, and solar panel compatibility in a single low-maintenance package.

  • Lifespan: 40–70 years
  • Fire Class A rated
  • Solar-panel ready (standing seam)
  • Wind resistant up to 140 mph
  • Steel, aluminum & Galvalume options

Picture Framing & Edge Details

Precision edge termination and perimeter picture framing — the most leak-prone area of any flat roof, handled with exacting detail. Combined with TPO or modified bitumen for a watertight finish.

  • Reinforced waterproofing at all roof edges
  • Clean architectural appearance
  • Custom fascia & parapet cap flashing
  • Compatible with all flat roof membranes
  • Standard on every TopCal commercial install

Who We Serve

Retail Centers & Strip Malls
Warehouses & Distribution
Office Buildings
Industrial & Manufacturing
Religious & Community Centers
HOAs & Multi-Family
Schools & Public Buildings
Hotels & Hospitality

Licensed & Bonded

CSLB Lic. #1112937. Fully insured with $2M general liability and workers' comp — protecting your property and your business throughout every project.

Minimal Disruption

We schedule commercial work around your business hours — evenings, weekends, phased sections — so operations never stop. No surprises, no delays.

We Pull All Permits

TopCal handles every permit, inspection, and sign-off required by LA County. You never have to deal with the building department — we own the process start to finish.

Manufacturer Warranties

As an Owens Corning Preferred Contractor, TopCal can issue manufacturer-backed system warranties — not just contractor warranties — giving building owners maximum protection.

Solar & Title 24 Ready

Every commercial install is engineered to California's Title 24 energy code. We prepare roof decks and penetration details for solar panel integration — future-proofing your building.

24/7 Emergency Response

Active leak on your commercial property? We provide same-day emergency response across all of LA County — stopping damage before it becomes a costly business interruption claim.

Ready to Get a Commercial Roofing Quote?

Free on-site inspection & detailed scope of work — no obligation. Most commercial quotes delivered within 24 hours.

Simple. Transparent. Stress-Free.

From the first call to the final walkthrough — every step is designed to make your roofing project easy and worry-free.

1

Free Inspection

Our certified inspector arrives on-site, conducts a thorough assessment, and documents all findings with photos — completely free of charge.

2

Custom Estimate

We provide a detailed written estimate with transparent, itemized pricing — no hidden fees, no surprises. You choose the materials and timeline.

3

Expert Installation

Our licensed crew handles all permits and completes the installation with precision — on time, on budget, and with zero compromise on quality.

4

Final Walkthrough

We walk you through the completed project, confirm your total satisfaction, and provide all warranty documentation before we consider the job done.

Never Wait On Hold.
Get Answers Instantly.

Our AI-powered Virtual Assistant is available 24 hours a day, 7 days a week — schedule a free inspection, ask roofing questions, get estimates, and more. No wait times, no business hours.

  • Schedule Free Inspections Instantly

    Book at 2am or 2pm — our assistant handles scheduling around the clock.

  • Ask Any Roofing Question

    From material selection to insurance claims — get expert answers immediately.

  • Emergency Response Dispatch

    Storm damage or active leak? Our assistant will connect you to emergency crews instantly.

  • Instant Financing Pre-Qualification

    Check 0% APR financing eligibility in minutes — no impact to your credit score.

Live Now — Available 24/7/365

Speak with our Virtual Assistant

(209) 720-3124

Call anytime to schedule your free inspection, get a roofing estimate, or ask any question — our assistant is always ready.

Call Now — It's Free
Submit Request Online

💬 Average response time: under 30 seconds

San Gabriel Valley's Favorite Contractor 2025 — Top Cal Roofing
Top Roofing Co. SGV 2025 San Gabriel Valley Award

Serving LA County
with Integrity for 17+ Years

Founded in Pasadena and rooted in the San Gabriel Valley, TopCal Roofing has grown to become Los Angeles County's most trusted roofing contractor — completing over 500 residential and commercial projects with a perfect 5-star reputation.

Our team of certified roofing professionals uses only manufacturer-approved installation techniques with the highest-grade materials from Owens Corning, Owens Corning, and Malarkey — ensuring every roof we install stands up to California's demanding climate for decades to come.

California State License Board (CSLB) — License #1112937 Fully licensed, bonded, and insured. Verified contractor in good standing with the State of California.
Owens Corning Preferred Contractor SGV Top Roofer 2025 5-Star Rated Fully Insured Owens Corning Certified Solar-Ready Specialist
Schedule Your Free Inspection

What Our Customers
Say About Us

500+ five-star reviews across Google, Yelp, Angi, and BBB. These are real stories from real homeowners and business owners in Los Angeles County.

"TopCal replaced our roof in just 2 days — the crew was professional, clean, and the quality is outstanding. Best contractor experience I've ever had. Highly recommend to anyone in Pasadena!"

M
Michael T. Pasadena, CA
⭐ Google Review

"After a major storm damaged our roof, TopCal came out the same day and handled everything — including our insurance claim from start to finish. Absolutely exceptional service."

S
Sarah K. Glendale, CA
⭐ Yelp Review

"Professional from inspection to cleanup — the new roof looks absolutely amazing and the price was very fair. I'd give them 10 out of 10. Don't hesitate to call these guys."

D
Daniel R. Whittier, CA
⭐ Google Review

"TopCal was incredibly professional throughout the entire process. My new tile roof looks stunning and I've already had neighbors ask who did the work. Couldn't be happier!"

J
Jessica A. Glendora, CA
⭐ Angi Review

"Our commercial warehouse needed a TPO re-roof on a very tight schedule. TopCal delivered on time and under budget — the quality is incredible and the crew kept our facility operational throughout."

R
Robert M. Burbank, CA — Commercial
⭐ BBB Review

"I called at 11pm about an emergency leak and someone picked up immediately. By 8am the next morning, the team was on my roof fixing the problem. This is what 5-star service really looks like."

L
Linda C. Arcadia, CA
⭐ Thumbtack Review

See all our verified reviews on

Yelp Google Angi BBB

0% APR Financing —
Protect Your Home Now

Don't let budget concerns delay critical roof repairs or replacement. Our flexible financing options make it easy for every homeowner to get the roof they need today.

0% APR — Interest-Free Financing

Qualified customers pay zero interest on approved roofing projects — keeping your monthly payments manageable.

Same-Day Approval Available

Quick and easy application process — many customers receive approval in minutes with no impact to credit score to check eligibility.

Flexible Payment Plans

Choose from 12, 24, 36, or 60-month payment plans tailored to your budget and the scope of your roofing project.

Insurance Claim Assistance

We handle storm damage insurance claims from start to finish — maximizing your payout and minimizing your out-of-pocket costs.

0%
APR Financing Available
For qualified customers on approved projects

A new roof is one of the most important investments you'll make in your home. With our financing, you can protect your property today without straining your budget.

Check My Financing Options

Call our 24/7 Virtual Assistant at (209) 720-3124

Proudly Serving
All of Los Angeles County

From Pasadena to Long Beach, from Santa Monica to Pomona — TopCal Roofing serves every community in Los Angeles County with the same award-winning quality and service.

Pasadena
Glendale
Burbank
Arcadia
Monrovia
Whittier
Glendora
Azusa
Covina
West Covina
San Gabriel
Alhambra
Temple City
El Monte
Monterey Park
Rosemead
Duarte
Altadena
Sierra Madre
San Marino

Trusted Manufacturer Partners & Certifications

Owens Corning Preferred Contractor ⭐
Malarkey Certified Installer
Malarkey Authorized Installer
CSLB Lic. #1112937
🏆 SGV 2025 Top Roofing Company

Frequently Asked
Questions

Have a question? Our 24/7 Virtual Assistant at (209) 720-3124 can answer anything instantly. Here are the questions we hear most often.

How much does a roof replacement cost in Los Angeles?
Most residential roof replacements in LA County range from $8,000–$25,000+ depending on roof size, pitch, material selected, and current condition. We provide free, detailed written estimates with no obligation. Call (209) 720-3124 for an instant ballpark or schedule a free inspection.
Do you handle insurance claims for storm damage?
Absolutely. TopCal Roofing works directly with all major insurance carriers and provides full claim management from documentation to approval. We maximize your payout and minimize your out-of-pocket expense. Call us immediately after any storm damage.
What is a Owens Corning Preferred Contractor and why does it matter?
A Owens Corning Preferred Contractor is certified by North America's largest roofing manufacturer, meaning we've met rigorous training and quality standards. This allows us to offer enhanced manufacturer warranties — including Owens Corning's Golden Pledge warranty — that standard contractors cannot provide.
How long does a roof replacement take?
Most residential roof replacements are completed in 1–3 days depending on the size and complexity of the roof. We handle all permits, complete the work efficiently, and clean up completely before we leave. We'll give you an exact timeline during your free estimate.
Are you licensed, bonded, and insured in California?
Yes. TopCal Roofing holds California Contractor's License #1112937, is fully bonded, and carries comprehensive general liability and workers' compensation insurance. You can verify our license at the CSLB website. We'll provide proof of insurance before any work begins.
Do you offer financing for roof replacements?
Yes! We offer 0% APR financing for qualified customers with flexible 12–60 month payment plans. Many customers receive same-day approval. Call our Virtual Assistant at (209) 720-3124 at any time to check your eligibility — it's fast and won't affect your credit score initially.
What areas of Los Angeles County do you serve?
We serve all of Los Angeles County, including Pasadena, Glendale, Burbank, Arcadia, Whittier, Glendora, Covina, San Gabriel, Alhambra, El Monte, Monrovia, Azusa, and 20+ additional communities. Call us to confirm service to your specific address.
What types of roofs do you install?
We install all major roofing systems including asphalt shingles, clay and concrete tile, TPO, torch-down (modified bitumen), picture framing, EPDM, metal roofing, wood shake, and cool roof coatings. Both residential and commercial installations. See our Roof Types section for full details.

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Roof Replacement Estimate

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Powered by Instant Roofer · Accurate within 1 square 98% of the time · All LA County ZIP codes covered

🛰️

AI Satellite Roof Estimator

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Your information is never shared with other contractors. Leads are exclusively yours.

Ready for Your
Free Roof Inspection?

Contact us by phone, online form, or call our 24/7 Virtual Assistant. We respond to all inquiries within 30 minutes during business hours and same-day on weekends.

24/7 Virtual Assistant
(209) 720-3124

Schedule inspections, get answers & emergency response

Office Location

530 S. Lake Ave, Pasadena, CA 91101

Business Hours

Mon–Fri: 7:00 AM – 6:00 PM
Saturday: 8:00 AM – 2:00 PM
Sunday: Closed (Emergency 24/7)

License & Credentials

CSLB License #1112937
Owens Corning Preferred Contractor
Fully Licensed, Bonded & Insured

🏆 Named San Gabriel Valley's Top Roofing Company 2025

Owens Corning Preferred • Owens Corning Certified • Malarkey Authorized

Request Your Free Inspection

Fill out the form and our team will contact you within 30 minutes. Or call (209) 720-3124 anytime.

🔒 Your information is kept private. Or call us anytime at (209) 720-3124

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