The short answer
The CertainTeed Landmark series tiers clearly. Standard Landmark carries a lifetime limited warranty, a 110 mph wind warranty with a 15-year wind period, ASTM D3161 Class F, and a 10-year algae warranty. Landmark PRO is UL 2218 Class 3 with a 15-year algae warranty. NorthGate and ClimateFlex are Class 4 with a 15-year algae warranty and a polymer-based asphalt formula.
Verified specifications
| Item | What CertainTeed publishes |
|---|---|
| Landmark | Lifetime limited, 110 mph wind warranty (15-year wind period), ASTM D3161 Class F, 10-year algae |
| Landmark PRO | UL 2218 Class 3, 15-year algae warranty |
| NorthGate and ClimateFlex | UL 2218 Class 4, 15-year algae warranty, polymer-based asphalt |
| Wind upgrade | 130 mph available with CertainTeed starter plus hip and ridge |
| Our status | RoadRunner is CertainTeed certified |
Figures above come from CertainTeed published product and warranty documents. Specifications change, so confirm against the current data sheet for the exact product before you sign a contract.
What this means for a roof here
Impact class earns an insurance credit, and in the Hill Country that credit compounds every year you own the house. What it does not do is make a roof hail proof. Manufacturers generally do not warrant shingles against hail damage, and a 2025 study by the Insurance Institute for Business and Home Safety found impact-resistant shingles performed only slightly better than conventional shingles against cumulative granule loss from repeated small hail. Buy the class for the insurance credit and the margin against large stones, not for immunity.
The other thing worth noticing across every brand on this page is how often the headline rating depends on the system rather than the shingle. Wind ratings and warranty tiers routinely require that manufacturer's starter, underlayment and ridge cap. A shingle installed without its specified components does not carry its advertised performance, and that gap is where cheap bids come from.
