Asphalt shingles

Timberline® Cool Series®, Timberline HD® Reflector Series™

Cool Series® Shingles use specially designed roofing granules that have greater reflectance than traditional shingles. This results in less transfer of heat to the space below which can help to reduce temperatures in your attic and save on air-conditioning costs. Not only that, Timberline® Cool Series® Shingles are made with the patented StainGuard® Protection — to ensure the beauty of your roof against unsightly blue-green algae!

Timberline HD® Reflector Series™ Shingles, an affordable cool shingle line only available in California, are rated by the Cool Roof Rating Council (CRRC) for use in Title 24 projects — so California-based contractors can now offer homeowners a wider variety of color options with the iconic Timberline HD® look to meet their cool roofing needs.

Performance dashboard

Features & functionality

Timberline HD® Reflector Series™

  • GAF’s proprietary color blends and enhanced shadow effect
  • Highest Roofing Fire Rating UL Class A
  • Title 24 cool roof requirements compliant

Timberline® Cool Series®

  • Made with patented StainGuard® Protection
  • Designed with Advanced Protection® Shingle Technology
  • Modern reflective technology

Visit GAF for more product information:

CSI MasterFormat® # 07 31 10

Environment & materials

Improved by:

ENERGY STAR®-qualified:

  • Reduces the amount of air conditioning needed in buildings, and may reduce energy bills
  • Downsizes cooling equipment
  • Decreases pollution in urban areas
  • May increase roof product life

Certifications & rating systems:

  • ICC-ES AC438 certified
  • ENERGY STAR® qualified
  • ASTM D3161 Type 1, Class F, D3018 Type 1
  • ASTM D34624, ASTM D7158, Class H
  • Miami-Dade County Product Control Approved
  • Florida Building Code Approved
  • Rated by Cool Roof Rating Council (CRRC)

Material Health Overview

The Health Product Declaration®

The HPD Open Standard provides a consistent, and transparent format to accurately disclose the material contents and associated hazard classifications for a building product.

How it works

Material ingredients are screened and categorized according to the hazards that international governmental bodies and toxicology experts have associated with them, based on two listings:

  • Authoritative lists maintained or recognized by government bodies
  • Screening lists, which include chemicals that government bodies determined need further scrutiny, as well as chemical lists not recognized by any government body

Assessment scope and results

Health Product Declaration®

Timberline Cool Series

Inventory threshold: 100 ppm

Full disclosure known hazards: Yes

Based on the selected content inventory threshold:

  • Characterized
  • Screened
  • Identified

Timberline HD Reflector Series

Inventory threshold: 100 ppm

Full disclosure known hazards: Yes

Based on the selected content inventory threshold:

  • Characterized
  • Screened
  • Identified

What's in this product and why

LT-1 Ingredients

Asphalt oxidized: Asphalt is the core of asphalt shingles. An unrefined by-product of crude oil processing, asphalt has been used for roofing products for thousands of years. It has a low embodied energy versus refined products, and is an effective and durable adhesive and waterproofing agent.

Titanium Dioxide Quartz: The user is not typically exposed to Titanium Dioxide in normal usage of roofing shingles.

Quartz: The user is not typically exposed to Quartz (sand) in normal usage of roofing shingles.

Reducing human health impact:

Timberline asphalt shingles have been continuously optimized to place materials only where they are needed via our Advanced Protection process. GAF scientists are continuously looking for opportunities to improve our products in performance and material health.

How we're making it healthier

GAF is a founding manufacturer of the Health Product Declaration Collaborative since 2011 and has supported the launch of the HPD Open Standard and HPD Collaborative.


Health Product Declaration® 
Timberline Cool Series
Timberline HD Reflector Series

Health Product Declaration Open Standard v2.1
The standard provides guidance to accurately disclose the material contents of a building product using a standard, consistent, and transparent format.

Rating systems

LEED BD+C: New Construction | v4 - LEED v4
Building product disclosure and optimization
Material Ingredients

  • Credit value options 1 product each

  • 1. Reporting

    2. Optimization

    3. Supply Chain Optimization

Living Building Challenge
Materials petals imperatives

  • 10. Red List Free

    12. Responsible Industry

    13. Living Economy Sourcing

WELL Building Standard®
Air and Mind Features

  • Air, 26. Enhanced Material Safety

  • Mind, 97. Material Transparency

    Mind, 98. Organizational Transparency

Collaborative for High Performance Schools National Criteria
MW 10.1 — Building Product Health Related Information Reporting

  • Product Health Related Information Report 1 point