The ASTM Test Your Roofing Will Never See

Your roof's ASTM and UL test ratings tell you how it performs in a climate-controlled lab on the day it's installed. They tell you almost nothing about how it performs after three Colorado winters. This piece walks through the major standardized tests your roofing probably passed—and the real-world conditions they don't simulate. From freeze-thaw cycles to UV degradation to hailstones that don't read the test protocol, here's what the industry tests miss, and why that matters for your house.