Compare Duration and Duration FLEX shingles by impact class, construction and appearance, then explore Owens Corning’s separate warranty options.
Start with two choices: Duration for a Class 3 architectural shingle, or Duration FLEX for a Class 4 product made with SBS polymer-modified asphalt. Then compare the color and complete installation scope.
What changes between them?
| Feature | Duration | Duration FLEX |
|---|---|---|
| Impact classification | Class 3 | Class 4 |
| Product distinction | Architectural shingle with SureNail | SBS polymer-modified shingle with SureNail |
| Color selection | Confirm local product colors | Confirm local product colors |
| Warranty package | Separate selection | Separate selection |
Impact ratings come from laboratory tests, not a promise of a hail-proof roof. Ask your insurer directly about any available discount and the documentation it requires.
Look at the roof as a whole
A close view makes the overlapping courses and granule blend easier to judge. Compare Duration and Duration FLEX with full-size samples, not a photograph alone. This roof illustrates shingle texture; it is not an identified Owens Corning installation.
Choose the warranty separately
| Question | Why it matters |
|---|---|
| Which package? | Standard, System, Preferred and Platinum differ |
| Which accessories? | The full system affects eligibility |
| Who covers workmanship? | Product defects and installation errors are separate |
| Who registers it? | Keep the written confirmation with your invoice |
View the Owens Corning warranty chart
Owens Corning impact-rating data sheet
Duration FLEX product information
Prepared by Barnes N’ Roofs. Reviewed September 17, 2026. Manufacturer documents control product coverage.