Full Roof Replacement in Gilroy, CA
Simmitri Inc. completed a full roof replacement for a private homeowner in Gilroy, CA, designing a hybrid roofing solution to address two distinct roof conditions on the property. The main residence received a complete tear-off and installation of GAF Timberline HDZ® Reflector Series shingles in Stone Gray under a GAF System Plus® warranty. The low-slope porch roof, which required a different waterproofing approach, was treated with a 15-year silicone spray coating selected for durability on low-pitch surfaces. The project was permitted through the City of Gilroy (Permit issued 05/07/2025), passed both installation and final inspections, and was closed out in late May 2025.
The Challenge
The home’s aging composition shingle roof had reached the end of its useful life and needed full replacement. The property also included a low-slope porch roof that could not be addressed with traditional shingles, requiring a separate waterproofing solution. The homeowner prioritized clean job-site management, minimal neighborhood disruption, and a warranty-backed system that would deliver long-term performance across both roof conditions.
Our Solution
Simmitri designed a hybrid roofing system tailored to each area of the roof. The main residence received a full tear-off followed by installation of GAF Timberline HDZ® Reflector Series shingles in Stone Gray, installed as part of a complete GAF System Plus® roofing system. The low-slope porch roof was treated with a 15-year silicone spray coating, providing durable waterproofing appropriate for that roof pitch. All penetrations, flashings, and transitions were carefully detailed throughout. The project was permitted through the City of Gilroy, passed all required inspections, and was completed with daily job-site cleanup and a final walkthrough to address cosmetic finishing details to the homeowner’s satisfaction.
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Before & After
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FAQ
What roofing system did Simmitri install on this Gilroy home?
Simmitri installed a complete GAF Timberline HDZ® Reflector Series shingle system in Stone Gray on the main residence, backed by a GAF System Plus® warranty. The low-slope porch roof received a 15-year silicone spray coating, selected specifically for its durability and water resistance on low-pitch surfaces.
What is a GAF System Plus® warranty and what does it cover?
The GAF System Plus® warranty is an enhanced manufacturer warranty that covers roofing materials and provides added protection beyond a standard product warranty. It gives homeowners long-term peace of mind knowing their roof system is backed directly by the manufacturer.
How does Simmitri handle homes with mixed roof pitches?
Simmitri evaluates each roof condition individually and designs a solution appropriate for each area. On this Gilroy project, the sloped main roof received GAF shingles while the low-slope porch required a silicone coating — two different systems installed under one coordinated scope of work.
Does Simmitri manage permits and inspections for roof replacements in Gilroy?
Yes. Simmitri handled all permitting and coordinated directly with the City of Gilroy’s building department. This project passed both the installation inspection and the final inspection, and was fully closed out in compliance with local building codes.
How does Simmitri keep the job site clean during a roof replacement?
Daily job-site cleanup is a standard part of every Simmitri installation. On this Gilroy project, the crew maintained an organized site throughout, minimized disruption to the surrounding neighborhood, and completed a final site restoration upon project close-out.