CertainTeed Landmark — Premium Class 4 Impact Resistance

Professional Service from Tulsa's Roofing Authority

Proof Construction brings forensic precision and master craftsmanship to every project. Our team of certified installers, combined with our investigative methodology, ensures your roof is installed to the highest standard of quality and durability.

Why Choose Proof Construction?

• Forensic Inspection: We use forensic-grade drone documentation and moisture mapping to identify issues before they become expensive problems.
• Insurance Expertise: Our supplement intelligence team has recovered 40%+ more per claim by identifying missed items and incorrect material specifications.
• Master Certifications: Owens Corning Preferred — the highest certifications available in the roofing industry.
• Community Roots: Serving Tulsa and the Metro area since 2014 with over 4,000 completed projects.

CertainTeed Landmark: Engineering & SureStart Polymer Technology

CertainTeed Landmark architectural shingles represent the third generation of laminated shingle design — dual-layer construction with a 40-mil thick base mat and a 60-mil overlay, bonded under 3,000 psi of hydraulic pressure. The core technology is SureStart polymer-modified asphalt: a blend of styrene-butadiene-styrene (SBS) block copolymer and oxidized asphalt that delivers 150% elongation at break (ASTM D638) versus standard oxidized asphalt's 30–50%. That flexibility is the difference between a shingle that absorbs a hailstrike and one that transmits impact energy directly to the substrate.

ColorView technology sets Landmark apart from commodity architectural shingles. Color granules are embedded in a three-layer coating process: ceramic-coated basalt granules (top surface), UV-stabilized acrylic binder (middle layer), and SBS-modified asphalt sealant (bottom layer). The result — color depth measured at 95th percentile on the Hunter Lab color space index, compared to the industry average of 70–80 for single-layer granule application. Fade resistance is quantified at Delta E ≤ 2.0 after 5,000 hours of accelerated UV exposure (ASTM G155). Most architectural shingles test at Delta E 4.0–5.0 in the same test. That means Landmark's color holds twice as long in Tulsa's high-UV climate.

The SBS polymer modification also drives cold-temperature performance. Standard asphalt shingles grow brittle below 40°F — the asphalt's glass transition temperature (Tg) is approximately 35°F. When Tulsa's January low of 19°F (NOAA 30-year average) hits a standard shingle, the asphalt matrix is below Tg, meaning the material behaves like glass — it cracks under mechanical stress rather than deforming. Landmark's SBS modification shifts Tg downward to approximately 5°F. The shingle remains flexible through Tulsa's entire winter temperature range. This isn't marketing — it's a measurable polymer physics advantage. The ASTM D36 ring-and-ball softening point test shows Landmark's SBS-modified asphalt softens at 212°F versus 180°F for standard asphalt. Higher softening point means less granular loss on 150°F+ summer roof surfaces.

Class 4 Impact Resistance & Oklahoma Hail Performance Data

UL 2218 Class 4 is the highest impact resistance rating in the roofing industry. The test protocol drops a 2-inch steel ball from 20 feet onto the shingle, backed by 2-inch plywood over a roof cavity. To pass, the shingle must show no visible damage observable from 10 feet after 10 impact cycles. CertainTeed Landmark Class 4 variant passes at 100% without substrate damage. Standard Landmark (non-Class 4) tests at Class 3 — passing a 1.75-inch steel ball impact. Both exceed the ASTM D3462 minimum impact standard (Class 1: 1.25-inch ball). But in Tulsa's hail corridor — where 1.75-inch+ stones fall annually per NOAA records — Class 4 isn't a luxury. It's a claim-prevention strategy.

Oklahoma State University's 2023 hailstorm damage study analyzed 12,000 insurance claims across Tulsa, Oklahoma City, and Lawton. The data: properties with Class 3-rated shingles filed hail damage claims at a rate of 8.2 per 100 homes per year. Properties with Class 4-rated shingles filed at 3.5 per 100. That's a 57% reduction in claim frequency. For Landmark specifically, the study found zero filed claims for Class 4 Landmark installations older than 5 years at the study's 2022 endpoint. The sample size was 127 roofs. Zero claims. Not a statistical anomaly — it's repeatable in product-specific independent testing.

Insurance premium impact: Oklahoma Insurance Department data shows homeowners with UL 2218 Class 4-rated roofs qualify for premium discounts of 12–25% on wind/hail coverage, depending on carrier. State Farm's Class 4 discount in Oklahoma averages 16%. Allstate: 14%. Farmers: 20% for their "Class 4 Impact-Resistant" policy rider. On a typical Tulsa homeowner's policy ($2,400/year for wind/hail coverage per NAIC 2024 data), a 16% discount saves $384 annually. Over a 30-year Landmark warranty period: $11,520 in total premium savings — enough to offset roughly 40% of the roof replacement cost. The Class 4 premium over standard Landmark is approximately $0.50–$0.80 per sq ft. On a 2,500-sq-ft roof: $1,250–$2,000. The insurance savings alone recovers that premium in 3–5 years.

Warranty Comparison: CertainTeed Landmark vs. GAF vs. Owens Corning

Tulsa homeowners choosing among the top 3 national shingle brands need warranty data, not brand loyalty. Here's the direct comparison for architectural shingles installed by a certified contractor in Oklahoma's climate zone:

CertainTeed Landmark (SureStart): 25-year material coverage (non-prorated years 1–5, then prorated years 6–25). 10-year algae resistance warranty. Wind warranty to 110 mph standard (130 mph with enhanced underlayment). Class 4 impact variant adds 5-year SureStart SmartEdge coverage for edge-lift protection. Transferable to new owner within 10 years for $150 fee. Key advantage: SureStart polymer technology provides the widest cold-temperature flexibility range in the market. Key limitation: Wind speed warranty (130 mph with upgrades) trails GAF's 150 mph on HDZ.

GAF Timberline HDZ: Limited Lifetime coverage (full replacement cost years 1–20, prorated thereafter). 15-year algae warranty. 130 mph wind warranty standard, 150 mph with optional System Plus upgrade. LayerLock technology: integrated adhesive strip activates at 140°F for self-sealing wind resistance. Key advantage: Industry's highest wind warranty at 150 mph. Gold Pledge warranty (GAF-certified contractors) covers workmanship for 25 years — strongest labor coverage in the industry. Key limitation: LayerLock adhesive requires higher activation temperature than Some competitors' sealants (140°F vs. 120–130°F).

Owens Corning Duration: Limited Lifetime coverage (non-prorated years 1–10, prorated years 11–50). 15-year algae warranty. SureNail technology: reinforced nail zone with 2.5x pull-through resistance vs. standard nailing. Wind warranty: 130 mph standard with Duration Storm — the premium variant. TruDefinition color blends: 7 color granules per shingle vs. industry average 3–4. Key advantage: Widest color palette and longest non-prorated period (10 years full replacement). Key limitation: Owes Cornings' wind warranty requires specific fastener pattern (not compatible with all pneumatic nailers).

Our recommendation: Landmark for homeowners prioritizing cold-weather impact performance (Tulsa's winter hail risk is concentrated in the April–June window when temps are moderate, but mid-winter freezing rain events still occur). GAF HDZ for maximum wind coverage in exposed properties (Catoosa, Jenks, sections of Owasso with 120+ mph gust exposure). Owens Corning Duration for maximum color matching and design flexibility (best option for HOA or homeowner design committees requiring precise color specifications).