Before & After Project

Cool Roof Replacement in San Carlos, San Diego, CA

A full residential cool roof replacement in San Carlos, San Diego, CA. This project involved removing two failing roof layers, upgrading the roof deck with OSB sheathing, correcting drainage deficiencies, and installing a Title 24–compliant asphalt shingle roofing system designed for long-term performance and warranty protection.

Project Overview

Type

Cool Roof / Title 24 Roof Replacement

Location

San Carlos, San Diego, CA

Size

Approx. 2,300 sq. ft.

Materials

GAF Timberline HDZ® Reflector Series shingles (Stone Gray), GAF TigerPaw® synthetic underlayment, GAF Pro-Start® starter strip, GAF CobraRidge® ridge vent, GAF TimberCrest® ridge caps

Warranty

GAF Golden Pledge® Warranty

Before, During, and After

Before

During

After

The Homeowner's Challenge

The existing roof had reached the end of its service life and presented multiple system-level issues. Two roofing layers, exposed fiberglass matting, and the absence of a cricket in a dead valley created drainage problems and increased the risk of continued failure.

Additionally, the original plank decking required structural upgrades to support a modern roofing system and meet current code requirements. The homeowner needed a full roof replacement that addressed these deficiencies while bringing the home into Cool Roof and Title 24 compliance.

Our Solution

Removed two existing roofing layers
Installed OSB sheathing due to plank deck conditions
Repaired deteriorated and damaged wood
Installed GAF TigerPaw® synthetic underlayment
Installed GAF Timberline HDZ® Reflector Series shingles in Stone Gray
Installed GAF CobraRidge® ridge vent and GAF TimberCrest® ridge caps
Completed final cleanup and project walkthrough

Project Photos

Materials Used

Roofing & Waterproofing

GAF TigerPaw® synthetic underlayment
GAF Pro-Start® starter strip

Roofing System

GAF Timberline HDZ® Reflector Series shingles — Stone Gray

Ventilation & Finishing

GAF CobraRidge® ridge vent
GAF TimberCrest® ridge caps

Warranty Coverage

GAF Golden Pledge® Warranty
Manufacturer-backed coverage for qualifying roofing materials and workmanship when installed by a GAF Master Elite® contractor.

Exact warranty terms were reviewed with the homeowner at project completion.

View Warranty Details

Why This Project Matters in San Carlos

Homes in San Carlos are exposed to inland heat conditions that place increased demand on roofing systems. This cool roof replacement demonstrates how proper deck upgrades, drainage correction, and Title 24–compliant materials work together to improve system performance and long-term durability.

This project provided:

Removal of a failing multi-layer roofing system
Deck upgrades to support modern roofing materials
Correction of drainage deficiencies
Title 24–compliant cool roof installation
Manufacturer-backed warranty protection

The difference is night and day. The crew was respectful, clean, and fast.

— James Peterson, San Marcos, CA

Ready for a roof you can rely on?

Considering a Similar Cool Roof Replacement in San Carlos?

This project is an example of how full cool roof replacement can resolve system-level failures and bring older roofing assemblies into current code compliance.

North County

Central & Coastal

East County

South Bay