Wildfire Resistant Construction: Fire Zones

Wildfire Resistant Construction: Fire Zones Wildfire resistant construction starts with understanding how fire zones shape design and siting choices. Research shows that ember showers—not direct flames—cause the majority of home ignitions in wildfires (studies by NFPA and NIST indicate ember-driven ignitions account for roughly 50–90% of structure losses in major WUI events). This article explains what fire zones mean for builders, how to read hazard maps, which materials and details lower ignition risk, and which DIY upgrades deliver the best protection for a given budget. You will learn practical, code-aware steps for new builds and retrofits in wildland-urban interface areas. TL;DR: - Ember prevention matters most: install screened vents (1/8" or finer) and Class A roofing to reduce ember-driven ignitions by 50–80%. - Create and maintain defensible space: clear 0–5 ft of flammable materials, thin 5–30 ft, and maintain 30–100+ ft extended reduction based on slope. - Prioritize low-co...