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.
Compare the installation scope too
Keep the product comparison and the installation proposal together. Ask the contractor to name the exact shingle, starter, underlayment, flashing and ventilation arrangement. A change from Duration to Duration FLEX should include a check of the instructions for that specific product.
| Before you choose | Ask to see |
|---|---|
| Shingle selection | The exact product name and a physical color sample. |
| Attachment and layout | The instructions the crew will use for that product. |
| Roof transitions | The valley, wall and pipe details in the written scope. |
| Warranty | The actual warranty offered and any registration requirements. |