On the fireline, the homes that are already gone usually aren’t the ones you’d expect—not abandoned properties and not obviously neglected ones. Homes that were freshly remodeled—new kitchens, updated decks, fresh landscaping. Gone. Because the work done on them didn’t account for the actual cause of most structure fires in wildfire events: wind-borne embers.
Most homeowners assume fire has to reach the walls to ignite a home. Research from the Insurance Institute for Business and Home Safety (and years of watching it happen on active firelines) tells a different story. Embers travel ahead of the fire front—sometimes for a mile or more—and land in or near structures long before direct flame contact is possible. That’s how a majority of homes are lost.
Architects and remodelers are in a position most people in the wildfire space aren’t: They see the building before conditions deteriorate. Every project in a fire-prone area is a chance to change that outcome.
Zone 0 Is a Detailing Problem
The 5 feet immediately surrounding a structure—what fire science calls Zone 0—is where most ember ignitions that threaten homes actually begin: combustible mulch, wood trim details, decking that butts against siding, planter boxes attached to exterior walls. These aren’t just landscaping choices but specification decisions.
When clients are choosing exterior materials or hardscaping in a wildland-urban interface zone, that’s a natural opening. Specifying non-combustible concrete board trim, composite decking or gravel ground cover in that immediate perimeter costs very little relative to the overall project scope.
It’s the kind of call that can keep a structure from igniting during an ember storm, which matters when fire departments are already managing multiple incidents and response is delayed.
Vent and Opening Details Get Overlooked
Attic vents, foundation vents and the gap under a garage door are entry points most people never think about. Under ember-storm conditions, those openings become the most dangerous parts of the building envelope. An ember that ignites inside a wall cavity or attic is extremely hard to suppress before the structure is already deeply involved.
For any retrofit touching the building exterior, wire mesh rated to no larger than 1/16-inch openings, door sweeps and ignition-resistant vent covers aren’t complicated additions.
Some state and local building codes address these requirements in new construction within high-fire-hazard severity zones. Existing homes—the ones most remodelers are working on—rarely carry those protections unless someone specifies them. That call falls to whoever is drawing up the spec.
The Pre-season Window Closes Faster than Clients Think
Red Flag conditions arrive with very little warning. The meaningful preparation window—before the first dry, high-wind days arrive—is measured in weeks for most of the West.
If you have clients in fire-prone areas and a project wrapping this spring or summer, add a wildfire hardening checklist to your project closeout. A review of vent protection specs, Zone 0 material choices, gap and threshold sealing details, and surface treatment options for decking and vegetation-adjacent trim takes under one hour. The homes that hold up in the next major fire season will largely be the ones where someone had the conversation before fire season started.