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GAF vs Owens Corning: how do their shingles compare on paper?
Timberline HDZ and TruDefinition Duration, side by side from each maker’s own documents. We have not tested either, so we do not pick one.
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Written by HyreRoof Research Desk Primary-source research and fact checking
The verdict
GAF vs Owens Corning comes down to the specific shingle line, the warranty your installer can register, and the accessories each wind warranty demands.
On paper, GAF Timberline HDZ and Owens Corning TruDefinition Duration are both laminated shingles that list ASTM D3161 Class F wind ratings, and each maker’s wind warranty depends on using its own starter and accessories.
We have not tested either, so this page sets out what each maker publishes and what to check. It does not rank them.
Which should you choose?
Check on a GAF Timberline HDZ quote
Whether the roof meets the four accessory requirements for the WindProven wind warranty: GAF starter strips, roof deck protection, ridge cap, and leak barrier or attic ventilation.
Whether the packages carry the StainGuard Plus logo, which the 25-year algae warranty requires.
Which warranty the installer can register, from GAF’s residential warranty guide.
Check on an Owens Corning Duration quote
Whether Owens Corning starter shingles go on both the eaves and the rakes, which the 160 mph wind warranty requires, along with Owens Corning components.
That nails land in the SureNail strip as the instructions show.
Which system warranty the installer can register, and what it excludes. Owens Corning notes its system coverage excludes non-Owens Corning products such as flashing, fasteners, pipe boots and decking.
GAF vs Owens Corning side by side
As each maker publishes it, read October 22, 2026. Terms change; check the current documents for the exact product on your quote.
| Published item | GAF Timberline HDZ | Owens Corning TruDefinition Duration |
|---|---|---|
| Type | Laminated architectural shingle | Laminated architectural shingle |
| Wind class | ASTM D7158 Class H; ASTM D3161 Class F (spec sheet) | ASTM D3161 Class F; ASTM D7158 listed (product page) |
| Fire class | Check the data sheet for the tested assembly | ASTM E108/UL 790 Class A listed |
| Impact class | Not stated on the pages we read; ask for the data sheet | UL 2218 Class 3 and FM 4473 Class 3 listed |
| Nailing feature | LayerLock nailing area | SureNail nailing strip |
| Wind warranty | 15-year WindProven, no maximum wind speed, with four required GAF accessories; otherwise 130 mph with special installation or 110 mph without | 160 mph when Owens Corning component requirements are met and starter is on eaves and rakes |
| Algae warranty | 25-year StainGuard Plus, on packages bearing that logo | StreakGuard algae resistance; see the warranty for the term |
| Shingle warranty | See GAF’s warranty guide for the tiers | Limited lifetime |
Wind classes are explained in roof wind uplift; warranty types in manufacturer warranty.
Cost over the life of the roof
The brand is rarely the big line on a quote. The installer, the accessories the warranty needs, and the warranty tier move the price more.
Upfront. Each wind warranty depends on that maker’s own starter, ridge and underlayment products. Ask whether those are priced in, line by line.
Over the life of the roof. A longer or stronger warranty only helps if it is registered and the installation follows the instructions. Ask for the registration in writing.
Resale. Some warranties transfer to a buyer on set terms. Read the transfer clause before you rely on it.
No price ranges yet, on purpose. HyreRoof publishes a price range for a job only once it holds at least 12 dated, sourced quotes for it, and we do not hold them for this work yet.
Until then, use the factors above to read a quote, and price your own numbers in the roof cost calculator or set quotes side by side in the estimate comparison tool.
The cost guide explains every line. For this comparison, the estimate comparison tool runs both of your quotes side by side.
Which fits your climate?
Climate changes which line of the data sheet to read first.
Read the wind warranty conditions, not the headline speed. Both makers tie wind coverage to their own accessories and nailing.
Compare the UL 2218 class of the exact line on your quote. Impact ratings can differ from one line to the next.
Check which algae warranty applies and what the package must show.
The ice barrier at the eaves is a separate product; check it is in the system the warranty names.
Verdict by home type
The house rarely decides the brand. What you check does.
| Your house | Where it points |
|---|---|
| Coastal or high-wind home | Compare the wind warranty conditions and confirm the crew will install every required accessory |
| Hail-prone area | Compare impact classes on the exact lines quoted, not the brand as a whole |
| Planning to sell | Compare warranty transfer terms |
| Two quotes, two brands | Set them side by side in the estimate comparison tool |
Your inquiry
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A person reads it and replies by email, free and with no obligation. Matching is not live yet, so this is not a quote. If water is coming in now, call a local roofer directly and check their license first.
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Questions
Is GAF or Owens Corning better?
What is the difference between Timberline HDZ and Duration?
Does the brand matter more than the installer?
Where do I find the real warranty?
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HyreRoof Research Desk
Primary-source research, data analysis and fact checking
We are a research desk, not a sales floor. We read the statute, the licensing board’s own pages, the code section or the federal dataset ourselves, and every figure we publish carries the document it came from and the date we retrieved it.
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On our first study that rule removed a Minnesota exam statistic and left two states blank. Those gaps are on the page, not in a file somewhere.
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General information. Codes, warranties and product data change and vary by location and product line; check the current documents and your building department. HyreRoof is not a roofing contractor and does not rank or sell roofing products.