A full architectural shingle re-roof on Castlemont Avenue in Cambrian Park — one of San Jose's established mid-century tract neighborhoods. Tear-off, significant deck repair, ventilation upgrade, and a 50-year manufacturer warranty delivered in 4 on-site days.
The Castlemont Avenue home was a 1960s-era single-story ranch in the heart of Cambrian Park — one of the established mid-century residential neighborhoods on San Jose's south-west side. The existing architectural shingle roof was 23 years old (installed in 2001 as the second replacement since the home was built), and classic end-of-service-life signals were everywhere: extensive granule loss visible in the gutters, curled shingles across the south-facing slopes, and growing moss colonies on the north-facing slopes where shade and fog exposure create persistent moisture conditions.
The homeowner had seen the signs and was proactive — scheduling the re-roof before active leaks developed, rather than waiting for water damage to force an emergency replacement. This approach saved significant money and aggravation compared to the reactive timing we often see. Their main concern was getting the project done correctly, with proper ventilation and materials that would deliver the full warranty life — not just another 20-year roof.
Our Cambrian Park assessment identified three priorities beyond the straightforward re-roof scope: (1) ventilation upgrade — the home's original box vents were inadequate and likely contributed to the 2001 roof's premature shingle breakdown, (2) algae-resistant materials — north-facing slopes in Cambrian's fog exposure need specific product selection, and (3) proper deck inspection — 60+ year old homes often have localized deck issues that only surface during tear-off.
Material specification: CertainTeed Landmark architectural shingles in a weathered-wood color with StreakFighter algae resistance. Premium underlayment. Ice-and-water shield at valleys and penetrations. Full chimney and skylight flashing renewal. And importantly: new ridge ventilation system replacing the inadequate original box vents. Proper ventilation extends the new roof's warranty life and is often the difference between hitting the full 30-year service mark and getting only 18-20 years out of a quality shingle.
Full photo documentation of existing conditions, attic assessment for ventilation baseline, and written scope-of-work delivered with material samples. Homeowner reviewed and approved before permit pull.
Standard residential re-roof permit for Cambrian Park address. 3-business-day turnaround from the city. Cambrian is outside historic preservation areas, so no additional review required.
Complete removal of existing 2001 shingle layer. Decking inspected across all slopes — we found and repaired approximately 18 sq ft of rotted decking at two locations (standard for 60+ year old homes with aging ventilation). Repairs documented with photos and quoted transparently as added scope.
CertainTeed DiamondDeck synthetic underlayment, ice-and-water shield at valleys and penetrations, new chimney and skylight flashing, full drip edge, and — importantly — new ridge ventilation system replacing the inadequate original box vents.
CertainTeed Landmark architectural shingles installed in the selected weathered-wood color with StreakFighter algae resistance. Proper 6-nail pattern for San Jose wind zone. Matching hip-and-ridge cap work. Starter course and drip edge detailing verified throughout.
San Jose city inspector signed off on completed work. Homeowner received 50-year SureStart PLUS manufacturer warranty registration, our 10-year workmanship warranty, complete project photo archive, and ventilation upgrade documentation for future reference.
Premium architectural asphalt shingle with StreakFighter algae resistance (critical for Cambrian's fog-exposed north slopes) and 50-year limited warranty under SureStart PLUS. Weathered-wood color selected to complement the home's existing exterior.
Modern synthetic underlayment replacing the 2001-era felt. 30-year warranty, significantly better tear resistance and weather durability during installation.
Self-adhering membrane at all valleys and penetrations, providing secondary water barrier at the most failure-prone locations.
Continuous ridge vent replacing inadequate original box vents. Proper ventilation extends shingle warranty life and reduces attic heat buildup — the single biggest factor in whether a new roof hits its full service life.
New drip edge at all eaves and rakes — protects the fascia and provides clean material termination. Previous installation had only partial drip edge coverage.
The homeowner got exactly what they wanted: a properly-installed, fully-warranted roof with the ventilation upgrade that will let it hit its full 30-year service life. No surprises during the project beyond the decking repair (which was documented and quoted transparently before we proceeded). 50-year SureStart PLUS warranty plus our 10-year workmanship warranty. The neighbor on Castlemont has since called us for her own estimate — referrals happen when work is visible and done well.
Cambrian Park is one of San Jose's established mid-century residential neighborhoods — developed predominantly between 1955 and 1975 on what was originally orchard land. The neighborhood is defined by single-story ranch homes on generous lots, with roof systems that reflect the era: mostly architectural asphalt shingle (some homes originally had wood shake that was converted in the 1980s-90s), some concrete tile on the more upscale streets, and occasional mid-century modern low-slope roofs on specific architectural styles.
What's specific to roofing work in Cambrian Park: most of the housing stock is now 50-65 years old and on its second or third roof cycle. Many homes had their original wood shake converted to composition shingle in the 1980s-90s, and many of those conversions are now ready for modernization. Ventilation is frequently inadequate by modern standards — homes built in the 1960s typically have box vents that deliver about half the ventilation modern code requires. Upgrading to continuous ridge ventilation during re-roof is one of the most valuable improvements homeowners can make — it extends new shingle warranty life meaningfully.
Cambrian's climate includes more fog exposure than central or eastern San Jose, especially on homes with mature tree canopies or north-facing slopes. This makes algae-resistant shingle formulations (CertainTeed StreakFighter, GAF StainGuard Plus) worth the modest upgrade cost — dark streaks on roofs are a visible sign of algae colonies that feed on shingle granules over time. Specifying algae-resistant materials is something we do by default for Cambrian projects.
A careful architectural shingle re-roof on a 1928 Willow Glen bungalow — aesthetic matching to the block's historic character, skip-sheathin...
An architectural shingle re-roof on a historic North 5th Street home in downtown San Jose — careful aesthetic matching to surrounding homes,...
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 · Serving San Jose Since 1952