Select and correctly document a shingle's wind-resistance classification (ASTM D3161 vs ASTM D7158) to meet a jurisdiction's design wind speed requirement.

Steps

1. Determine the required design wind speed for the project location from the local building code wind map.
2. Identify which test method the shingle manufacturer publishes ratings under: ASTM D3161 (fan-induced/steady air-stream test, using class letters such as Class A, D, or F) or ASTM D7158 (uplift-force/resistance calculation method, using class letters such as Class D, G, or H).
3. Do not treat class letters as equivalent across the two standards, since the same letter (e.g., 'Class D') represents a different wind speed under each method; use the manufacturer's published documentation for the exact product.
4. Confirm the code-required minimum classification for the project's wind zone against the current adopted code edition (e.g., higher wind zones typically require the top class under whichever standard the code references).
5. Document the specific ASTM standard and class for the exact product and lot on the permit/warranty paperwork, not just the general product line name.