Project Overview

Location: Blossom Hill, San Jose, CA 95123
Project Type: Complete Roof Replacement + Ancillary Work
Phases: Three separate scopes
Additional Work: New plywood decking, seamless gutters, attic sanitization, R-38 insulation
Total Investment: $71,830

Some roofing projects are simple. But the project on Kiowa Circle in San Jose’s Blossom Hill neighborhood was a comprehensive renovation: new roofing, new plywood decking, new seamless gutters, and a fully refreshed attic — all completed by Lifetime Roofing & Renovation over several weeks.

Phase 1: Roof Replacement and New Plywood Decking

After tear-off, inspection revealed the existing decking was compromised — moisture damage, soft spots, and delamination throughout. We specified new plywood decking throughout before laying the full Owens Corning roofing system with synthetic underlayment, ice and water shield in the valleys, and architectural shingles across the entire roof surface.

Phase 2: Gutters, Downspouts, and Attic Work

The homeowner upgraded to new seamless white aluminum gutters with downspouts and stainless steel gutter screens. Seamless gutters are formed on-site from a single continuous piece of aluminum — eliminating the seams where leaks typically develop.

For the attic, existing insulation was removed, the space was sanitized, and new R-38 fiberglass batt insulation was installed throughout the attic floor — meeting California’s Title 24 energy code requirements for Santa Clara County.

Common Questions About Full Roof Replacements With Gutters and Insulation in San Jose

Should I replace my gutters when I replace my roof?
Strongly recommended. New seamless gutters ensure drip edge and gutter alignment are perfect from day one and eliminates damage risk during tear-off.

What is R-38 insulation and do I need it in San Jose?
R-38 meets California’s Title 24 energy code for Santa Clara County. Many older Bay Area homes still have R-11 or R-19. Upgrading can reduce heating and cooling costs by 15–25%.

How do I know if my roof decking needs replacement?
Look for soft spots, sagging appearance, water stains in the attic, or delaminated OSB discovered during tear-off. A reputable contractor documents damage with photos before proceeding.

What does a full roof replacement cost in South San Jose?
In 2025–2026, approximately $18,000–$35,000 for a typical home. Comprehensive packages with decking, gutters, and attic work can reach $60,000–$75,000 depending on scope.

Does replacing my roof improve home value in San Jose?
Yes — a new roof eliminates a major contingency concern during sale and can add $10,000–$25,000 to perceived value in the Bay Area market.

Full Roof Replacement With New Decking, Gutters, and Attic Insulation in San Jose, CA