Jefferson County's new Wildfire Resiliency Code took effect July 1, 2026, and Clear Creek County has adopted comparable requirements. Here's who it applies to, what it requires for roofing, siding, decks, and windows, and how to stay compliant.
Every siding material puts different demands on the wall behind it. Vinyl siding is light, roughly half a pound per square foot, and it hangs loosely on a nailing hem, so it tolerates a less-than-perfect substrate. Fiber cement is a different animal. James Hardie lap and panel siding weighs several times more than vinyl per square foot, and unlike vinyl, it's face-nailed or blind-nailed directly into the wall assembly.