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GAF Timberline HDZ Architectural Shingles

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Upgrade Your Roof With the Strength and Style of Timberline® HDZ™

Protect your home from Montana’s toughest weather — from heavy snow to high winds — with Timberline® HDZ™ shingles installed by Western Montana Roofing. Combining the beauty of a dimensional wood-shake look with industry-leading technology, these shingles deliver lasting curb appeal, unmatched durability, and peace of mind backed by the best warranties in the business.

Overview

  • Type: Laminated architectural asphalt shingle

  • Profile: Dimensional, wood‑shake look with enhanced shadow lines

  • Wind rating: Industry‑first Unlimited Wind Speed Warranty (when installed with required GAF accessories)

  • Fire rating: UL 790 Class A fire‑resistant

Exclusive Features

  • LayerLock™ Technology: Fuses shingle layers together for the industry’s widest nailing zone and superior fastening strength

  • StrikeZone™ Nailing Area: 600% larger nailing area makes installation faster and more consistent

  • Dura Grip™ Sealant: Creates a powerful bond that helps reduce shingle blow‑offs

  • Algae Protection: StainGuard Plus™ (on most colors) protects against unsightly blue‑green algae

Certifications & Testing

  • GAF Master Elite® Certified Contractor – Top 2% of all roofing contractors in North America

  • UL 790: Class A Fire Rating

  • ASTM D3161: Class F wind resistance

  • Meets or exceeds ASTM D3462 shingle durability standards

Impact‑resistant Timberline HDZ® RS shingles are available for homeowners who need UL 2218 Class 4 hail protection. Standard Timberline HDZ® shingles do not carry a Class 4 rating.

Why Choose Timberline® HDZ™ with Western Montana Roofing?

  • The #1‑selling shingle in North America, trusted by more homeowners than any other brand

  • Proven durability backed by GAF, North America’s largest roofing manufacturer

  • Advanced technology for easier, more consistent installation

  • Beautiful dimensional look at a competitive price

  • Golden Pledge® Warranty: 50‑year material & 25‑year workmanship coverage

  • Industry‑leading quality and peace of mind from a local Master Elite® Certified contractor

Only the Best Roofers Can Offer This

...and Western Montana Roofing Is One of Them!

You’ll have to call 50 other roofers to find one as good as us!

Less than 2% of roofing contractors nationwide qualify as GAF Master Elite® Contractors—and Western Montana Roofing is proud to be among them.

This elite certification means they can offer the GAF Golden Pledge® Warranty—the most powerful and comprehensive roofing warranty in North America.

  • Lifetime material coverage

  • 25 years of workmanship protection

  • A full factory inspection by GAF after installation

  • No dollar limit on materials

  • Wind and algae resistance

  • Full transferability for future home sales

Most roofers can’t offer this level of protection—because they haven’t earned it. Choosing Western Montana Roofing means choosing elite craftsmanship, rigorous quality standards, and peace of mind that lasts a lifetime.

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gaf timberline hdz architectural shingle product guide

Warranty Coverage

Because Western Montana Roofing is a GAF Master Elite® Certified Contractor, we are able to offer GAF’s Golden Pledge® Limited Warranty—the best in the industry.

  • Golden Pledge® Warranty: 50‑year material defect coverage and 25‑year workmanship coverage, backed directly by GAF

  • Lifetime Limited Warranty: Covers manufacturing defects for as long as you own your home

  • WindProven™ Limited Wind Warranty: No maximum wind speed limit (when installed with required accessories)

  • Algae Warranty: 25‑year limited warranty on algae discoloration with StainGuard Plus™

(Warranties are subject to proper installation and registration. See GAF warranty documents for full details.) 

Specifications

  • Weight: Approx. 3 bundles = 1 square (100 sq. ft.)

  • Dimensions: 13¼” × 39⅜”

  • Exposure: 5⅝”

  • Deck requirements: Minimum 3/8″ plywood or equivalent

  • Minimum roof slope: 2:12 (may require additional underlayment for low‑slope applications)

Color Options

Available in a wide selection of designer colors to complement any home (colors vary by region. Request an actual sample before final selection).

Popular choices include:

  • Charcoal

  • Pewter Gray

  • Weathered Wood

  • Barkwood

  • Hickory

  • Hunter Green

  • Mission Brown

Request Actual Samples

Charcoal

Slate

Pewter Gray

Hunter Green

Cedar Falls

Mission Brown

Barkwood

Birchwood

Hickory

Weathered Wood

Shakewood

GAF Timberline HDZ Architectural Shingles FAQ

How long do Timberline® HDZ™ shingles last?
When properly installed and maintained, Timberline® HDZ™ shingles can last 25–30 years or more. With Western Montana Roofing’s GAF Golden Pledge® Warranty, you’ll get 50 years of material defect coverage and 25 years of workmanship coverage for even greater peace of mind.
Are Timberline® HDZ™ shingles good for Montana’s weather?
Yes. These shingles are engineered to handle extreme conditions, including high winds, heavy snow, and ice. Their LayerLock™ Technology and Dura Grip™ Sealant provide a strong bond that resists blow-offs, even in storms.
Can Timberline® HDZ™ shingles help prevent algae stains?
Yes. Most colors feature StainGuard Plus™ protection, which helps prevent unsightly blue-green algae growth — keeping your roof looking clean and attractive longer.
Do I need impact-resistant shingles for hail protection?If hail is a concern in your area, we offer Timberline HDZ® RS shingles, which are UL 2218 Class 4 impact rated for extra protection. Standard Timberline® HDZ™ shingles do not carry a Class 4 rating, but both provide excellent weather resistance.
Yes. Most colors feature StainGuard Plus™ protection, which helps prevent unsightly blue-green algae growth — keeping your roof looking clean and attractive longer.
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Reviews from Around the Web

Levi B.
Western Montana Roofing is the kind of company I'd have work on my house any day. The main reasons are, trustful, honest, and hardworking. They got to my house to do a job and they got it done quick. Not only that, but this company will work on some pretty cold days. Im giving this company 5 stars, by what I've seen and experienced from Western Montana Roofing they definitely earned it! And my new roof looks way better and I couldn't be happier!
Shea W.
Great company under terrific ownership. It’s hard to find good quality, reliable roofing companies in Montana. Western Montana Roofing does a quick job and doesn’t cut corners. Highly recommend using them.
Cindy Jimmerson
5 stars not enough for this great crew! They replaced 2 failing roofs (house/garage) on the hottest days of July and met every unanticipated challenge without cutting corners. Really, over and above! From owners to laborers they were exceptional.
Dane Deda
We highly recommend Western Montana Roofing. Zack and his crew are very professional, easy to work with and do quality work. We are extremely satisfied.
Stacy M
Working with Western Montana Roofing was easy from the first call. Zach and team were responsive to my questions, provided a comprehensive quote, and allowed me to take samples to select the color for my roof. I had many neighbors comment on how friendly and efficient they were when completing the job. And they even cleaned the gutters when they were done!
Max Carpenter
100% Satisfied. Western Montana Roofing is a high energy company of problem solvers and skilled craftsmen. From start to finish, we were impressed by the old roof removal, new roof installation and final inspection. A very professional outfit, highly recommend!
Bridger Frandsen
WMR did an exceptional job on my roof. They sent me an estimate in a timely manner that my insurance accepted immediately, and had the roof repaired within days. Great people, great work.
Rick and Angie Unruh
Zach and his crew were extremely easy to work with through all stages of replacing the roof on our home. They courteously and promptly responded to all of our questions. They did everything agreed upon in the timeframe agreed upon, left everything clean (no nails or debris left behind), and charged a reasonable price.
Charles Nieblas
They arrived when they said they would. They completed the job in two days. The crew cleaned up afterwards, even picking up loose nails on the ground. I would highly recommend this company if looking to get roof work done.
Molly Hulling
Western Montana Roofing was a great company to work with for our new roof. The crew was quick and polite and the staff was helpful and responsive. Our new roof looks great and we are very thankful for all the hard work.
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