Fire efficiency isn't simply the core; bracket alloys, bolt grades, and finish systems all influence scores

https://cesarqfsi620.tearosediner.net/roofing-system-vents-that-tell-the-truth-copper-s-century-of-efficiency-in-demanding-climates

Fire efficiency isn't simply the core; brace alloys, screw grades, and coating systems all influence rankings, so settings up are tested with each other for real-world conformity.