CertainTeed vs GAF Shingles: Which Is Better?

Homeowners often ask us which brand to choose, expecting one to be clearly better. Honestly, both CertainTeed and GAF make excellent shingles that will protect a Michigan home for decades. They are the two largest shingle manufacturers in the country, and either one, installed well, is a good roof. This guide compares their flagship lines fairly, so you understand the real differences.

The bigger truth is that the installer matters more than the badge on the wrapper. The strongest manufacturer warranties are only available when a credentialed contractor installs a complete system, and most roof failures trace back to installation, not the shingle. As a CertainTeed-credentialed contractor we recommend and install Landmark, but we can work with any manufacturer you prefer and will tell you honestly what fits your home and budget.

The honest answer up front

Neither brand is meaningfully 'better' for a typical Michigan home. Both make architectural asphalt shingles that carry comparable warranties, similar wind ratings, and 25-to-lifetime performance. If you put a well-installed Landmark roof next to a well-installed Timberline HDZ roof, both will serve you well for decades. The choice usually comes down to the specific line, the color you want, and, above all, who installs it.

The lineups compared

Both brands sell a good-better-best range. Knowing the tiers helps you match the shingle to your home and budget rather than just picking a brand name.

• CertainTeed Landmark: the workhorse dual-layer architectural shingle, slightly heavier build, wide color range.
• Landmark Pro / Premium: heavier weight and longer coverage for a more substantial roof.
• CertainTeed NorthGate: an SBS 'rubberized' shingle built for cold climates, with Class 4 impact resistance, well suited to Michigan.
• GAF Timberline HDZ: the best-selling architectural shingle in North America, with the LayerLock nailing zone for fast, consistent installs.
• GAF Timberline HDZ RS+ / UHDZ: upgraded lines with higher wind coverage and a thicker, more dimensional look.

Cold-weather and impact performance (Michigan matters)

Michigan's freeze-thaw cycles, wind and occasional hail put real stress on shingles. Standard architectural shingles handle it fine, but if you want extra durability, look at impact-rated and SBS-modified lines. CertainTeed's NorthGate uses SBS (styrene-butadiene-styrene) modified asphalt that stays flexible in the cold and resists cracking and impact, earning a Class 4 rating. A Class 4 impact-resistant roof can also earn an insurance premium discount with some carriers, worth asking about.

Warranties decoded

Shingle warranties sound impressive but the fine print matters. Out of the box, shingles carry a limited manufacturer warranty and a short 'SureStart'-style full-coverage period. The strong, long-term coverage, the kind that covers materials and workmanship for decades, is only unlocked when a credentialed contractor installs a complete system (leak barrier, underlayment, ventilation and matching accessories), not just shingles.

• Standard limited warranty: comes with any shingle, but prorates quickly and excludes labor.
• Credentialed full-system warranty: CertainTeed's Integrity Roof System and GAF's System Plus / Golden Pledge tiers add long-term material and workmanship coverage.
• Registration matters: the upgraded coverage usually must be registered by the credentialed installer after the job.
• Transferability: strong system warranties can transfer to a buyer, a real plus if you sell.

Why the installer matters more than the brand

Ask any honest roofer and they will tell you the same thing: most leaks are not the shingle's fault. They come from bad flashing, skipped leak barrier, poor ventilation, over- or under-driven nails, or shingles nailed outside the manufacturer's zone. A mediocre shingle installed correctly will outlast a premium shingle installed badly. That is why credentials exist, and why we recommend choosing your contractor first and your shingle second.

Which we recommend, and why

We install CertainTeed because we hold their top credentials (ShingleMaster, Integrity Roof System, Shingle Quality Specialist and SureStart Plus), which lets us offer the strongest system warranties, and because lines like NorthGate are genuinely well suited to Michigan winters. That said, if you prefer GAF or another manufacturer, we will install it and explain the trade-offs honestly. The goal is the right roof for your home, installed correctly, not a brand we are pushing.