Onward
Quick answer: GAF and CertainTeed are near-equals at $5–$7 per square foot installed. GAF Timberline HDZ wins on wind-ratability (no-max-speed WindProven warranty) and its huge installer network; CertainTeed Landmark wins on heavier construction (~230 lb/square) and the widest color palette. The contractor matters more than the brand.
GAF and CertainTeed are the two shingle brands you’ll hear most when you start collecting roofing quotes. GAF is the largest asphalt shingle maker in the United States with roughly 30% market share; CertainTeed, owned by Saint-Gobain, sits in the top three at about 15%. Both make lifetime architectural shingles, both back them with 50-year non-prorated system warranties, and both compete at almost the same price. So the honest answer to “which is better” is: it depends on what you weigh, and on who installs it.
This page compares their flagship lines side by side — GAF Timberline HDZ against CertainTeed Landmark, plus their premium tiers — across price, wind performance, weight, looks, algae resistance, and warranties. At Onward we match you with vetted pros who can quote either brand, so we have no stake in which one you pick. The goal here is a fair read on real 2026 specs.
Price per square: a near tie
For standard architectural shingles, the two brands land in the same band. GAF Timberline HDZ runs roughly $5–$7 per square foot installed in 2026; CertainTeed Landmark runs roughly $5–$7.50. Premium colors and designer profiles add about $0.50–$1.00 per square foot on either brand.
GAF often holds a slight edge on raw material cost, but that gap rarely survives a real estimate. Labor is usually about 60% of a roof bill, and your region, roof pitch, and tear-off complexity move the total far more than the shingle brand. A simple ranch in a low-cost market can come in under both ranges; a steep, cut-up roof in a high-cost metro can exceed them.
| Cost element | GAF Timberline HDZ | CertainTeed Landmark |
|---|---|---|
| Standard colors (installed) | $5–$7 / sq ft | $5–$7.50 / sq ft |
| Premium / designer add | +$0.50–$1.00 / sq ft | +$0.50–$1.00 / sq ft |
| Typical 2,000 sq ft roof | ~$11k–$17k | ~$11k–$18k |
The takeaway: don’t pick the brand to save money, because the savings is noise. For how the rest of your roof budget breaks down, see our roofing cost guide and the cost methodology behind those numbers.
Wind ratings and nailing technology
This is where the brands genuinely differ. Both Timberline HDZ and Landmark carry a 110 mph base wind warranty and reach 130 mph when installed with the matching starter strip and hip-and-ridge cap. The split shows up at the top end and in how forgiving each is to install.
GAF’s LayerLock technology widens the nailing zone by about 600% compared with a standard shingle. That sounds like a spec-sheet flourish, but it’s practical: a wider target means fewer nails placed too high or too low, and high or low nails are the single most common cause of wind blow-off. Install Timberline HDZ with four qualifying LayerLock components and it qualifies for GAF’s WindProven Limited Wind Warranty, which carries no maximum wind-speed limit. No CertainTeed line matches that no-cap position.
CertainTeed counters with NailTrak, a widened nailing guide printed across the shingle that helps installers stay in the proper zone and work quickly. It’s a real aid to accuracy, just not as large a margin as LayerLock. Landmark’s wind warranty tops out at the 130 mph rating.
For high-wind and hurricane-exposed homes, GAF has the stronger paper position. But hold one caveat in mind: the warranty rating only holds if the roof is nailed correctly and the starter course is sealed. A mediocre install voids the advantage of either brand. If wind isn’t your main worry, this category is close to a wash.
Weight, durability, and impact resistance
CertainTeed builds the heavier shingle. Standard Landmark weighs roughly 230 pounds per square versus about 210 pounds for GAF Timberline HDZ, and the upgraded Landmark Pro and Premium tiers climb to roughly 235–250 pounds. More mass can translate to better behavior in hail and extreme heat, and it gives Landmark a more substantial feel underfoot.
That said, weight is not a clean proxy for durability. Both brands meet the same UL standards for their class, and a Class 4 impact-rated shingle from either maker will outperform a standard shingle from the other in a hailstorm. The Insurance Institute for Business & Home Safety (IBHS) tests impact performance independently of brand, and its message is consistent: the impact rating on the wrapper matters more than the logo.
Here’s the practical read. If you live in hail country, ask specifically for a Class 4 impact-rated line from either brand — many insurers offer a premium discount for one. If you’re in a temperate climate, the weight difference between standard HDZ and Landmark won’t change how long your roof lasts. For how material choice maps to lifespan, see our data on roof lifespan by material and the blog on how long a roof lasts.
Looks and color range
If curb appeal drives your decision, CertainTeed has the edge. Landmark is a dual-layer laminate engineered for appearance — it produces deep shadow lines, a thick dimensional look, and what the industry generally credits as the widest designer color palette of the major brands. Landmark Pro is offered in around 17 colors depending on region, with rich multi-tone blends.
GAF Timberline HDZ holds its own with a strong color lineup and bold, high-contrast blends that read well from the street, but Landmark wins on sheer variety. Color also affects performance: lighter blends reflect more heat, which can matter in hot climates.
A note on color longevity. CertainTeed’s premium tiers extend color-retention guarantees alongside their longer algae coverage, so if a specific deep tone is the reason you’re buying, the Pro or Premium line protects it longer. Either way, order a physical sample board and look at it on your own roof in daylight before you commit — printed swatches and screens distort color badly.
Algae resistance and energy efficiency
Both brands fight the black streaks caused by Gloeocapsa magma algae with copper-infused granules, but the standard warranties differ. GAF Timberline HDZ ships with a 25-year StainGuard Plus algae warranty. Standard CertainTeed Landmark carries a 10-year StreakFighter warranty, extending to 15–30 years on the Pro and Premium tiers.
If you live somewhere humid and shaded — the Southeast, the Pacific Northwest, anywhere with heavy tree cover — that 25-year vs. 10-year gap is worth weighing, because streaking is one of the most common cosmetic complaints homeowners file. To match CertainTeed’s coverage to GAF’s, you generally need to step up to Landmark Pro or Premium.
On energy efficiency, both brands offer cool-roof / solar-reflective shingle options that meet ENERGY STAR criteria and can trim attic heat gain in hot climates. Neither holds a decisive advantage; the bigger efficiency levers are attic ventilation and insulation, not the shingle brand. If you want a reflective line, confirm the specific color is rated, since not all colors qualify.
Warranties and certification networks
On paper the top warranties are near-twins. GAF’s Golden Pledge and CertainTeed’s SureStart PLUS (also called the 5-Star) both offer up to 50 years of non-prorated material coverage and 25 years of workmanship protection, with tear-off, disposal, and labor covered on a valid claim. Both are lifetime material warranties on a qualifying shingle.
The real difference is the gate you have to pass through:
- GAF Golden Pledge requires a Master Elite contractor and includes a GAF site inspection of the finished install.
- CertainTeed SureStart PLUS / 5-Star requires a SELECT ShingleMaster — a tier held by under 1% of roofers — plus a complete CertainTeed Integrity Roof System (shingles, underlayment, starter, hip-and-ridge, and ventilation all CertainTeed).
That gap in availability is GAF’s quietest advantage. Master Elite contractors are far more common, so getting Golden Pledge is realistic in most markets, while finding a SELECT ShingleMaster can be genuinely hard. Both warranties also allow one transfer to a future owner, which helps resale — read the document for the specific window, since it varies by line. For how to read these terms without getting burned, see roofing warranties explained.
Reputation and why the installer matters most
Both companies carry strong reputations. GAF is the largest U.S. shingle manufacturer; CertainTeed, backed by Saint-Gobain, is a long-respected top-three brand. When you read poor reviews of either, dig into the cause — the overwhelming majority trace back to installation defects, not a flaw in the shingle. Lifting shingles, leaks at flashing, and premature blow-off are workmanship problems, and no warranty fully protects you from a crew that nails wrong or skips the starter course.
That’s why the brand debate, while real, is secondary. The same Timberline HDZ or Landmark shingle will last decades on a correctly installed roof and fail early on a botched one. This is exactly what The Onward Shield checks before we match you with a contractor: active license, current insurance, manufacturer certification status, and verified reviews — so the pro quoting you can actually register the warranty they promise. See how we verify roofers and our list of the best roofing companies.
The bottom line
GAF vs. CertainTeed is close enough that you can buy either with confidence. Choose GAF Timberline HDZ for the strongest wind position, the most forgiving install, a 25-year algae warranty, and the widest pool of certified contractors. Choose CertainTeed Landmark for a heavier shingle, deeper shadow lines, and the broadest designer color range — if you can find a SELECT ShingleMaster. Either way, the contractor decides whether your roof lasts 12 years or 30.
The smartest next move isn’t picking the brand first — it’s lining up a vetted pro who can quote both, so you compare real numbers on your actual roof. Get a free estimate and we’ll match you with verified roofers who carry both lines.
