Class 4 Shingle Brands
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The UL 2218 Class 4 impact-resistant shingle lines offered across major brands — GAF Timberline UHDZ and Timberline AS II, CertainTeed Landmark ClimateFlex, Landmark Premium, NorthGate ClimateFlex and Grand Manor, Owens Corning Duration STORM and FLEX, Malarkey's polymer-modified lines, and IKO Nordic.
What Is Class 4 Shingle Brands?
Every major shingle manufacturer now offers at least one line rated UL 2218 Class 4 for impact resistance, and the brand names differ even when the classification is the same. GAF states that Timberline AS II shingles, made with its SBS-modified asphalt formulation, pass UL 2218 Class 4, and that Timberline UHDZ shingles sold in packages bearing the UltraMat logo and UL 2218 Class 4 classification statement are rated Class 4. CertainTeed identifies Landmark ClimateFlex, Landmark Premium, NorthGate ClimateFlex, and Grand Manor as UL 2218 Class 4 impact-resistant shingles, with the ClimateFlex lines using polymer-modified asphalt. Owens Corning's Class 4 offerings are the TruDefinition Duration STORM and FLEX lines, Malarkey builds its lines on polymer-modified asphalt, and IKO's Class 4 line is Nordic. A homeowner comparing quotes can ask each bidder which specific line is being priced and whether that line carries the UL 2218 Class 4 classification on its own product literature. How the classification interacts with insurance policies and premiums is a separate question from which brands manufacture qualifying products.
Important Distinction
Note: Class 4 is a UL 2218 impact-resistance classification a manufacturer earns for a specific product line, not a property of a brand as a whole — most brands sell Class 4 and non-Class 4 lines side by side, and the classification statement appears on the product's own packaging and literature.
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Also Known As
These are the search terms and phrases that commonly refer to this topic, so you can find it however you describe it.
Related roofing topics
The brand roster names who manufactures UL 2218 Class 4 lines, while the impact-resistant shingles concept covers what the classification means and how insurers treat it.
Class 4 shingle lines exist because hail damage is the loss their UL 2218 steel-ball impact classification is designed to address.
Most Class 4 lines are impact-rated members of the same architectural shingle families that appear on ordinary replacement quotes across every major brand.
Topics related to this one
Malarkey Legacy Shingles is UL 2218 Class 4 in Malarkey's Product Data Guide.
Malarkey Vista Shingles is UL 2218 Class 4 in Malarkey's Product Data Guide.
Malarkey Windsor Shingles is UL 2218 Class 4 in Malarkey's Product Data Guide.
Owens Corning Duration FLEX Shingles carries UL 2218 Class 4 on Owens Corning's product page.
Owens Corning Duration STORM Shingles carries UL 2218 Class 4 on Owens Corning's product page.
UL 2218 Class 4 impact-rated shingle lines sit above the architectural baseline in cost, and are one of the premium-material choices that commonly move an Austin replacement into the higher project band.
A quote promising an impact-rated shingle is making a checkable product claim: the class rating belongs to a specific listed product, not to a brand name, and the product on the quote either carries it or does not.
Class 4 impact-rated products are ordered through the same distributor chain as standard shingles; availability of a specific Class 4 line depends on the local branch roster.
The 'somewhat longer' impact-resistant tier in the lifespan table is not generic: it names specific UL 2218 Class 4 product lines - GAF Timberline AS II, CertainTeed ClimateFlex, Owens Corning Duration STORM and FLEX, Malarkey's polymer-modified lines, IKO Nordic - most built on polymer-modified asphalt that stays flexible longer under Texas heat cycling.
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