Keith Roofing Company has been covering San Jose roofs for decades — residential and commercial, tile and shingle, repair and replacement. Family-owned since 1952. BBB A+ Accredited. California Licensed #1118418.
San Jose is our home city. Keith Roofing Company was founded here in 1952 when San Jose was still a town of orchards and canneries with around 95,000 residents. Seventy-three years later, San Jose has become the third-largest city in California with over a million people, and Keith Roofing has been on the roofs of thousands of San Jose homes and commercial buildings across every neighborhood the city has grown to encompass.
Our office at 424 Lano Street in the Willow Glen area has been our base of operations for decades. From there, our crews travel across San Jose every working day — from the Cambrian Park tract homes in the south to the downtown commercial buildings in the center, from the hillside custom homes of Almaden Valley to the rancher neighborhoods of Evergreen and Berryessa. We know which neighborhoods have what roof types, which inspectors care about what details, and which streets are tight enough to need special planning for roofing material delivery.
What makes us different from other San Jose roofing companies isn't marketing — it's time. When you've been roofing homes in one city for seven decades, you see every material performance cycle. You learn which contractors shortcut which details and what those shortcuts cost homeowners 15 years later. You develop relationships with tile manufacturers that give you access to legacy colors discontinued decades ago. You know the permit office staff by first name. Every Keith Roofing San Jose project starts with that institutional knowledge.
What this means for you: When you call Keith Roofing for your San Jose home or business, you're not getting a generic quote from a roofer who works everywhere and specializes nowhere. You're getting contractors who know this specific market — the typical failure modes, the dominant roof systems, the permit process, the HOA and preservation rules, and the pricing that makes sense for your property type and neighborhood.
Decades of working this specific market means we know the common failure modes, the dominant roof systems, and what to look for at estimate.
San Jose residential roofing is overwhelmingly architectural asphalt shingle (on mid-century and newer tract homes across the bulk of the city), with significant concentrations of concrete and clay tile (on Spanish Revival, Mediterranean, and custom homes — particularly in Willow Glen, Almaden Valley, and Cambrian). Commercial roofing in San Jose runs the full range — we install TPO single-ply for modern commercial flat-roof systems, silicone restoration coatings for aging commercial roofs, and modified bitumen and BUR for specific applications. Downtown San Jose has small-commercial flat-roof work across its historic storefronts. The industrial corridors along the 101 and 880 have substantial warehouse and logistics building roofing demand.
Thousands of San Jose homes built in the post-war residential boom are now on their second or third roof cycle. Original 3-tab shingles replaced in the 1990s are now aging out and due for architectural shingle replacement with proper ventilation upgrades.
San Jose's extensive tile roof inventory — particularly in Willow Glen, Almaden, and Cambrian — is largely running on original underlayment that's 30-50 years old. Lift-and-relay is often the right answer when tile is sound but underlayment has failed.
Portions of San Jose are in WUI (Wildland-Urban Interface) overlays, including properties near Alum Rock, Silver Creek, and the hillside neighborhoods in south San Jose. Class A fire-rated assemblies are required in these zones.
San Jose has substantial inventory of 1970s-90s commercial buildings with aging built-up roofs ready for TPO conversion or silicone coating restoration.
San Jose's sheer size — over 180 square miles and 1 million residents — means we handle the widest range of roof types of any service area. The city spans Spanish Revival historic districts, mid-century tract neighborhoods, custom hillside estates, newer subdivisions, commercial office parks, industrial warehouses, and small retail corridors. Each has its own typical roof system, its own failure modes, and its own material preferences. Our seven decades of San Jose work mean we've installed, repaired, and replaced every one of these systems — many of them multiple times.
For residential shingle (the dominant San Jose roof type), we're certified contractors for CertainTeed (SureStart PLUS), GAF (System Plus), and Owens Corning (Preferred Contractor) — giving us access to enhanced warranties that roofers tied to just one manufacturer can't match. Typical installations include synthetic underlayment, ice-and-water shield at valleys and penetrations, architectural shingles installed per manufacturer spec, ridge ventilation, and proper flashing renewal at chimneys and skylights.
For tile roofing, we work with Monier Lifetile, Eagle Roofing, and Westlake Tile (formerly Eaglelite), with direct supplier access to legacy color profiles for matching 30-50 year old installations. We do full tear-off and replace, lift-and-relay underlayment restoration, and selective tile replacement for repairs and renovations.
For commercial flat-roof work, we install Carlisle SynTec, GAF EverGuard, and Firestone UltraPly TPO single-ply systems, apply GE and Gaco silicone restoration coatings, and handle modified bitumen and built-up roof installations for specific applications. Commercial work includes structural review coordination, Title 24 energy compliance documentation, and property-manager-friendly scope reporting.
San Jose's Mediterranean climate is actually relatively easy on roofing materials — mild winters, modest rainfall, and mostly-dry summers. Architectural shingle delivers 25-35 year service life here. Concrete and clay tile roofs regularly reach 50-75+ years. Commercial TPO delivers 20-30 year warranted service life. For San Jose homeowners planning to stay long-term, material investment typically pays back in avoided re-roof cycles and insurance benefits.
Roofing materials and installation techniques should reflect local climate realities — not generic specifications. Here's what San Jose's specific weather patterns mean for your roof.
San Jose summers push 88-95°F with significant UV exposure over 250+ clear days per year. Dark-color shingles on south-facing slopes see surface temps exceeding 150°F. Algae-resistant and cool-roof compliant materials are standard recommendations.
Mild wet winters average 15 inches of rainfall concentrated in December through March. Atmospheric-river events can deliver 3-5 inches in 48 hours. Proper flashing and valley detailing handles these events; marginal installations fail.
San Jose has portions in WUI and Fire Hazard Severity Zones — primarily in hillside areas adjacent to open space (upper Almaden, Silver Creek, Evergreen foothills, areas near Alum Rock). Class A fire-rated assemblies are required in these zones. Fog exposure is moderate in central San Jose and higher closer to the Bay and hillside areas.
San Jose roofing priorities: UV-resistant materials that hold color and performance over 25-35 years, Title 24 cool-roof compliance (enforced by the San Jose permit office), proper flashing for the annual winter storm cycle, and fire-zone compliance where applicable. The city's sheer size means roof recommendations should match the specific neighborhood and property type.
Our home turf — historic bungalows, Spanish Revivals, Craftsmans, and small-commercial along Lincoln Avenue.
Concrete tile country — custom hillside homes with multi-decade Monier and Eagle Roofing installs.
1960s-70s tract homes — straightforward architectural shingle re-roofs are our daily work.
Sprawling residential with diverse roof systems and strong solar-retrofit demand.
Established neighborhoods with tile and shingle mix, excellent access to 680.
Historic residential near downtown plus commercial flat-roof work along Santa Clara Street and 1st Street corridors.
Our estimator comes to your San Jose property, walks the roof (where safe), inspects the attic, and takes measurements. No high-pressure sales tactics, no overnight decisions required.
You receive a detailed written estimate with material options, labor specs, permit fees, warranty information, and timeline. Clear pricing you can compare against other bids.
We pull the San Jose building permit (typically 2-5 business day turnaround), schedule your project start, and coordinate material delivery to your property.
Our W-2 crews perform the installation following manufacturer spec and San Jose building code. We protect landscaping, clean up daily, and document installation details for warranty registration.
Final inspection, warranty paperwork delivered to you, manufacturer warranty registration completed, and photographic documentation for your records. We also follow up at 30 and 90 days to ensure everything's performing as expected.
We've been roofing San Jose homes since 1952. Every San Jose roofing contractor with 'Since' language younger than that is claiming a history we've actually lived. Our institutional knowledge of this market runs deeper than anyone else's.
Our office is at 424 Lano Street in Willow Glen. We live here, work here, and our crews commute from nearby neighborhoods. You're not hiring a contractor who sends crews in from Sacramento or the Central Valley.
As CertainTeed SureStart PLUS, GAF System Plus, and Owens Corning Preferred Contractors — plus certified for Monier Lifetile, Eagle Roofing, Carlisle SynTec, and IB Roof Systems — we offer enhanced warranties no single-brand roofer can match.
BBB A+ Accredited. California Licensed (CSLB #1118418). 4.7 stars on Google with 91+ verified reviews. Full insurance documentation available. Clear written estimates. No surprise change orders. The boring stuff other roofers make exciting.
Full tear-off re-roofs with premium materials from CertainTeed, GAF, Owens Corning, Monier, and Eagle. Permits pulled, code-compliant installs, manufacturer warranties registered.
Learn MoreLeak repair, storm damage, missing tiles, flashing failures, and emergency response. Same-day tarping available for active leaks.
Learn MorePre-purchase, pre-sale, post-storm, or annual inspections. Written reports with photos and honest recommendations. Free with estimate.
Learn MoreConcrete and clay tile — new installs, lift-and-relay, selective replacement. Monier Lifetile and Eagle Roofing certified installer.
Learn MoreArchitectural asphalt shingles — CertainTeed, GAF, Owens Corning. 30-year warranties standard, premium designer options available.
Learn MoreTPO, EPDM, modified bitumen, silicone coatings, and full commercial flat-roof systems for San Jose businesses.
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A 1948 Craftsman-influenced ranch home in Willow Glen came to us with a 32-year-old asphalt shingle roof installed in 1992. The homeowner had been patching leaks at the chimney flashing for three years and wanted a full solution before the upcoming winter. Our assessment found: original skip-sheathing deck (common for the era), failed chimney flashing with substantial water intrusion, two hidden areas of deck rot, and compromised ridge ventilation. We completed a full tear-off and re-roof: deck rot remediation with new solid sheathing overlay (documented with photos for records), new ridge vent ventilation system, full chimney flashing renewal with proper counter-flashing, synthetic underlayment with ice-and-water shield at all valleys, and installation of CertainTeed Landmark architectural shingles in Weathered Wood with 50-year SureStart PLUS warranty. Project completed in 4 days, final inspection passed first visit, and homeowner received complete documentation package for insurance renewal.




Every Keith Roofing estimate is free and no-obligation. Call or message us and we'll be in touch within one business day.
BBB A+ Accredited · CSLB #1118418 · Based in San Jose · Serving San Jose Since 1952