CertainTeed Landmark Impact Review: A Minnesota Installer's Honest Take (2026)

CertainTeed Landmark Impact is a polymer-modified asphalt architectural shingle with a UL 2218 Class 4 impact rating, the highest residential hail classification available. In the Twin Cities it installs for roughly $21,500 to $28,000 on a typical 2,000–2,400 sq ft home, qualifies for the 10–25% Class 4 insurance discount on every major Minnesota carrier, and has one specific advantage over GAF Timberline AS II and Owens Corning Duration Storm: it stays flexible in cold weather. That makes it the safer Class 4 pick for spring and shoulder-season installs in Minnesota.

What Exactly Is CertainTeed Landmark Impact?

Landmark Impact is the Class 4 version of CertainTeed's flagship Landmark architectural shingle line. The standard Landmark series (Landmark, Landmark Pro, Landmark Premium) is one of the most-installed architectural shingles in North America. Landmark Impact uses the same dimensional shadow line and color philosophy but with two structural changes: a heavier SBS-modified asphalt formulation and a reinforced fiberglass scrim laminated into the back of the shingle to keep it intact under impact.

That fiberglass scrim is the distinguishing technical feature. GAF achieves Class 4 by modifying the asphalt itself with SBS polymer. Owens Corning achieves it with SureNail technology and a polymer additive. CertainTeed does both: SBS-modified asphalt and a fiberglass reinforcement layer. The result is a shingle that resists fracture from hail and holds together exceptionally well during a high-wind event.

What Does UL 2218 Class 4 Mean for a Minnesota Roof?

UL 2218 is the Underwriters Laboratories impact-resistance test. A 2-inch hardened steel ball is dropped from 20 feet, roughly the impact energy of a 2-inch hailstone at terminal velocity, onto the shingle, twice in the same spot. To earn Class 4, neither side of the shingle can split, crack, or rupture. Class 3 uses a 1.75-inch ball, Class 2 a 1.5-inch ball, Class 1 a 1.25-inch ball. Class 4 is the highest tier.

In a real Twin Cities storm, Class 4 doesn't make a shingle hail-proof. A 2.5-inch or 3-inch hailstone from a supercell will still bruise the granule surface. That's a cosmetic claim and an insurance claim. What Class 4 does is keep the underlying asphalt mat intact, which is what creates leak pathways when a standard shingle fails. A Class 4 roof that gets hit by borderline hail often has visible bruising but no structural compromise. That's the difference between filing a routine claim and watching a leak develop in your ceiling.

Every major Minnesota carrier (State Farm, American Family, Allstate, Auto-Owners, Travelers, Liberty Mutual, USAA, Erie) discounts the roof portion of the premium when documented Class 4 material is installed. Discounts run 10 to 25 percent depending on carrier and policy structure.

Why Does Cold-Weather Flexibility Matter So Much in Minnesota?

This is the single feature that swings my recommendation toward Landmark Impact in late fall and early spring installs.

Asphalt shingles get stiff as the temperature drops. Standard asphalt becomes noticeably brittle below about 40°F and seriously brittle below 25°F. A brittle shingle is more likely to crack when a nail gun drives a fastener, to develop hairline fractures when foot-traffic compresses it during install, and to fail to bond at the seal strip until the next warm-weather cycle.

The Minnesota installing window is shorter than most homeowners realize. Manufacturers' published install temperatures are typically 40°F surface temperature minimum for standard shingles. In Maple Grove, Coon Rapids, Plymouth, or Andover, that means most of November, December, January, February, and March are technically off-spec for standard architectural installs. Landmark Impact's SBS-modified mat stays flexible at substantially lower temperatures. It can be installed safely down into the upper 30s with proper hand-sealing technique.

For a homeowner whose insurance claim was filed in October after a late-season hailstorm and who wants the roof done before spring, Landmark Impact reduces install risk. That's not marketing. That's why I quote it preferentially on November-through-March projects.

The same flexibility also helps year-round with Minnesota's freeze-thaw cycles. A more flexible mat survives expansion/contraction with fewer hairline cracks over the roof's lifetime.

What Colors Does CertainTeed Landmark Impact Come In?

Color depth is one of Landmark Impact's clearest wins over GAF AS II and OC Duration Storm. CertainTeed stocks Landmark Impact in roughly 10 to 12 colors at Twin Cities distributors. Common availability includes:

• Moire Black
• Charcoal Black
• Pewter
• Weathered Wood
• Burnt Sienna
• Driftwood
• Cottage Red
• Heather Blend
• Resawn Shake
• Max Def Hunter Green
• Georgetown Gray
• Colonial Slate

The "Max Def" series (Max Def Weathered Wood, Max Def Driftwood, Max Def Hunter Green) uses CertainTeed's enhanced granule mix that produces deeper, more dimensional color shifts across the roof plane. For homeowners replacing a roof on a craftsman, tudor, modern farmhouse, or any home where exterior color depth matters, Landmark Impact gives you more options than the competing Class 4 lines.

If your siding or trim sits in the deeper-color range (deep red brick, hunter green trim, dark navy fiber cement), Landmark Impact often wins the color match conversation outright.

What Does CertainTeed Landmark Impact Cost Installed in the Twin Cities?

On a typical 2,000–2,400 sq ft Twin Cities home with a single-layer tear-off, moderate roof complexity, and full code-compliant install, here are the 2026 installed ranges I see:

Class 4 carries a $1,500 to $3,000 premium over standard architectural Landmark on a typical home. For most Minnesota homeowners paying $1,200 to $2,000 a year in roof-related premium, the 10–25% Class 4 insurance discount recovers that premium in roughly 5 to 8 years and continues paying for the rest of the roof's life. See the broader Minnesota roof replacement cost guide for full context on what drives the range.

What Warranty Does CertainTeed Landmark Impact Carry?

Like GAF and Owens Corning, CertainTeed tiers its warranty coverage by the installer's certification level. The shingle is the same in every case; the warranty depends on who installs it.

SureStart Plus is CertainTeed's equivalent of GAF's Golden Pledge, the strongest residential warranty available, only offered by the top contractor certification tier. To get SureStart Plus on a Landmark Impact roof, the install must be done by a SELECT ShingleMaster contractor using CertainTeed's complete roof system (CertainTeed underlayment, starter, hip-and-ridge, ventilation). Mixing in non-CertainTeed system components downgrades the warranty.

If your contractor isn't SELECT ShingleMaster, the practical question is whether 4-Star (5-year workmanship) is enough or whether you should hold out for a contractor who can offer SureStart Plus. For most Minnesota single-family homes, 5-year workmanship coverage is sufficient because most workmanship failures show up in years 2 to 5. For HOA, townhome, and higher-value properties, holding out for SureStart Plus is worth the extra contractor search.

CertainTeed Landmark Impact vs GAF Timberline AS II vs OC Duration Storm

These are the three Class 4 shingles I quote against each other most often. None is universally "best." Each wins in specific situations.

For a full three-way breakdown see the GAF vs CertainTeed vs Owens Corning comparison.

Who Is CertainTeed Landmark Impact Best For?

Pick Landmark Impact if:

• Your install is happening in cold weather (November–April). The SBS-modified mat is the most forgiving of the three Class 4 options in low temperatures.
• You want maximum color choice in a Class 4 shingle. The Max Def palette gives you deeper reds, greens, and blends than the competing lines.
• You have access to a SELECT ShingleMaster contractor and want SureStart Plus, the equivalent of GAF Golden Pledge.
• You're in a high-hail micro-zone and want the combination of Class 4 impact rating plus the structural reinforcement of the fiberglass scrim.
• Your exterior color palette skews deeper (deep brick, hunter green trim, navy fiber cement) and you want the roof to coordinate, not contrast.

Who Should Pick an Alternative?

Skip Landmark Impact if:

• Brand recognition is the priority. GAF Timberline is the most-installed shingle in North America. A future buyer's inspector will know the name on sight. CertainTeed is well-known but slightly less ubiquitous.
• Your contractor is GAF Master Elite but only CertainTeed ShingleMaster (not SELECT). The Golden Pledge with AS II beats the 4-Star with Landmark Impact on workmanship coverage. Match the warranty to the strongest available installer relationship.
• You're in a low-hail micro-zone where Class 4 doesn't pencil financially. A standard Landmark Pro architectural at $17,500–$22,500 may make more sense.
• You want the absolute lowest wind warranty risk. GAF and OC both publish 130 mph; CertainTeed publishes 110–130 mph depending on install pattern. The difference is small but real.
• Your insurance is non-renewing the roof entirely regardless of upgrade. Some carriers are pulling out of MN on age alone. See our piece on roof-age non-renewal first.

The right Class 4 shingle isn't a brand decision. It's a match between your install season, your color needs, your contractor's certification, and your micro-zone's claim history.

What Voids the CertainTeed Warranty?

The same patterns that void GAF and OC warranties apply to CertainTeed:

• Inadequate ventilation: CertainTeed requires the same 1:150 net free area minimum (or 1:300 with balanced intake/exhaust). Soffit blockage is the most common voiding cause I see.
• Mixed-brand system components at the upgraded tiers: SureStart Plus requires CertainTeed underlayment, starter, hip-and-ridge, ventilation.
• Off-spec nailing: CertainTeed specifies 6 nails per shingle in high-wind zones (which includes most of Minnesota); 4 nails forfeits coverage.
• Post-install penetrations not re-flashed to CertainTeed spec.
• Installation by a non-authorized contractor: the entire warranty resets if a CertainTeed-authorized installer wasn't on file at time of install.

This is one of the reasons certification documentation matters. On every CertainTeed install I do, the customer file includes the venting calculation, system component invoice (showing all CertainTeed components), and a photo record of the nailing pattern on each plane. That's the documentation a warranty claim adjuster will ask for.

Will It Help on a Future Insurance Claim?

Yes, in the same three ways as any Class 4 shingle. The annual premium discount runs 10–25% on the roof line. On a future borderline hailstorm, the Class 4 mat is more likely to survive without a leak (which protects your loss history). And when a full claim is filed, the documentation of a Class 4 product often shortens the adjuster conversation.

If you already have an open claim, review the recoverable depreciation guide and the broader Minnesota insurance claim guide. The shingle choice is one decision; getting the full insurance settlement is a separate one with its own paperwork.

Frequently Asked Questions

Northern Forge Construction is a Coon Rapids–based roofing contractor serving the Twin Cities metro. MN Licensed BC809688. Owner Luis Hernandez is on every job site. This article is informational and does not represent a manufacturer endorsement; warranty terms are summarized. Refer to CertainTeed's published warranty documents for full coverage details.