Factory-Certified Work
Certifications & Manufacturer Partners
We are a Polyglass® Certified Installer, GAF Master Elite® contractor, and factory-authorized partner for the brands that matter. That means better warranties, stricter standards, and roofs that hold up.
CSLB LIC# 1094851 · B, C-39 · Bonded & Insured
Verified Credentials
Why Certification Matters
Manufacturer certifications are not marketing badges. They are factory audits of training, workmanship, insurance, and licensing — the same protections that make your warranty valid.
GAF Master Elite®
Top-tier factory certification from North America’s largest shingle manufacturer. Only the top 2% of roofers qualify.
Owens Corning Preferred Contractor
Authorized to install Owens Corning Duration®, TruDefinition®, and Oakridge® systems with Platinum Protection warranties.
CertainTeed SELECT ShingleMaster™
Factory-credentialed for CertainTeed Landmark®, NorthGate®, and Grand Manor® shingles with SureStart™ protection.
Polyglass® Certified Installer
Trained and approved by Polyglass (a Mapei company) to install APP, SBS, and self-adhered modified bitumen roofing systems. Used across San Jose for Eichler flat roofs, tile underlayment, and low-slope commercial decks.
Boral / Eagle Roofing Preferred
Certified for clay and concrete tile installation, including lift & relay, underlayment, and valley detailing.
Carlisle, Johns Manville & TPO/PVC
Experienced single-ply installers for large commercial, multi-family, and industrial flat roofing projects.
Supported Brands
We Install & Service What We Certify
Shingle & Composition
GAF, Owens Corning, CertainTeed, IKO, Atlas, Malarkey
Tile & Slate
Boral, Eagle Roofing, Ludowici, Verea, US Tile, DaVinci, Brava
Metal
Standing Seam, Custom Metal Fabrication, Sheffield Metals, ATAS
Single-Ply Commercial
Carlisle, Johns Manville, Firestone, GAF EverGuard, Polyglass TPO
Modified Bitumen / Torch Down
Polyglass, Soprema, Johns Manville, GAF
Underlayments & Coatings
Grace, Polyglass, GAF, Owens Corning, Henry, RC2000
San Jose Roof Scenarios
Where Polyglass Shines in San Jose
From Eichler flat roofs to tile underlayment and commercial low-slope systems, Polyglass is the right fit for many common Bay Area roofing situations.
Eichler & mid-century flat roofs
San Jose and the Peninsula have thousands of Eichler and mid-century homes with original low-slope or flat roofs. Polyglass APP/SBS modified bitumen systems replace the old membrane with a modern, heat-welded assembly that handles our dry summers and occasional heavy rains.
Tile roof underlayment
In Willow Glen, Los Gatos, and Saratoga, clay and concrete tile roofs depend on the underlayment for waterproofing. Polyglass self-adhered underlayments create a sealed, long-lasting barrier beneath the tile and stand up to high attic heat.
Low-slope additions & patio covers
ADUs, patio covers, and second-story additions often have slopes too low for shingles. Polyglass self-adhered membranes are designed exactly for these tight, detail-critical areas where flashing and seams matter most.
Commercial flat roofs & TPO
Retail, office, and multi-family buildings across San Jose, Santa Clara, and Milpitas rely on Polyglass TPO and modified bitumen for flat roofs that meet local fire and energy codes while keeping long-term maintenance costs low.
HOA & multi-family re-roofs
HOAs and apartment communities in Cupertino, Sunnyvale, and Fremont use Polyglass for phased re-roofs that minimize tenant disruption and deliver consistent, manufacturer-backed warranties across every building.
Wildfire-adjacent zones
For homes near the Santa Cruz Mountains and foothills, Polyglass Class-A fire-rated assemblies add defense and help meet insurance requirements in areas where ember exposure is a real concern.
Polyglass Certified Installer
Frequently Asked Questions
What the Polyglass certification means and how to verify it for yourself.
What does Polyglass Certified Installer mean in San Jose?
Polyglass Certified Installer means our crews have completed hands-on training directly from Polyglass — a Mapei company and one of the most respected names in modified bitumen, APP, SBS, and self-adhered roofing. The certification verifies that we follow Polyglass-approved installation methods, use compatible accessories, and meet the manufacturer’s workmanship standards on every San Jose job, from Eichler flat roofs in Willow Glen to tile underlayment in Saratoga and low-slope commercial decks in Santa Clara. That matters because it protects your warranty and ensures the roof is built to last.
Why should a San Jose homeowner or building owner care about a Polyglass certification?
Manufacturer certifications are not just badges — they control whether your roof qualifies for an enhanced warranty. San Jose’s mix of mid-century flat roofs, tile estates, and high-density commercial buildings makes proper installation critical. When a Polyglass Certified Installer applies the system, you get the confidence that the materials were installed the way Polyglass engineers intended, which is especially important for low-slope additions, patio covers, and torch-down work where a single detail failure can lead to a leak.
How can I confirm California First Roofing is a Polyglass Certified Installer in the San Jose area?
You can confirm the credential in three ways: (1) ask us for our current Polyglass certificate and installer ID, (2) visit the Polyglass contractor locator and search for California First Roofing in the San Jose / Bay Area, or (3) call Polyglass directly at their published support number and verify our company name. We are happy to email or show you the certificate on-site before the project starts.
Does Polyglass certification cover both residential and commercial work in San Jose?
Yes. In San Jose, Polyglass products are used on residential low-slope roofs, balconies, patio covers, ADUs, and commercial flat roofing across Santa Clara County. Our certification covers the installation methods for these systems regardless of whether the project is a single-family home in Los Gatos, an HOA in Cupertino, an apartment building in Fremont, or an industrial property in Milpitas.
Will a Polyglass roof installed by your team qualify for an extended warranty?
In many cases, yes. Polyglass offers enhanced warranties when the roofing system is installed by a certified contractor using eligible components from deck to finish. We will specify the exact warranty level in your written San Jose proposal and register the job with Polyglass when applicable.
Want to verify before you hire?
We will email or text you a copy of our current certificates, walk you through the Polyglass contractor locator, and answer any questions on the phone. No pressure — just proof.
Request a free Polyglass estimate in San Jose
Call or email today for a free roof evaluation and a written proposal that names the Polyglass system, warranty details, and installation timeline for your San Jose property.
Polyglass In Action
Before & After Polyglass Roof Installs
Real Bay Area roofs upgraded with Polyglass systems by a certified installer.
Before
Aging built-up roof with cracked seams, ponding after winter rain, and fading reflective granules leading to interior leaks and rising cooling costs.
After
Seamless white Polyglass TPO single-ply membrane reflecting heat, eliminating ponding, and backed by a 20-year system warranty.
Disclaimer: Every roof is different. Actual results depend on existing roof condition, structural health, weather exposure, and the specific Polyglass system selected. Photos show representative projects — your project timeline and finish may vary.
Polyglass TPO single-ply membrane — low-slope commercial re-roof. Polyglass self-adhered underlayment under premium clay tile. Polyglass underlayment + GAF Timberline HDZ shingle system.
Fast & Free
Request Your Polyglass Estimate
Tell us about your roof and we will reply with a written, itemized Polyglass estimate for your San Jose property. No pressure, no hidden fees — just factory-backed pricing from a certified installer.
- Free on-site evaluation
- Polyglass system specified by name
- Warranty details included in writing
Serving the Bay Area
San Jose, Santa Clara, Milpitas, Fremont, Sunnyvale, Cupertino, Los Gatos, Saratoga, Campbell, Morgan Hill, Gilroy, Mountain View, Palo Alto, Redwood City, and all of Santa Clara County.
Free • No Obligation
Get Your San Jose Estimate
Sent directly to sales@californiafirstroofing.com — response within 15 minutes during business hours.
Ready for a Certified Roof?
Get a Factory-Backed Proposal
Call us for a free roof evaluation and a written proposal that names the manufacturer systems and warranty levels we will install.