Which of the following is NOT typically considered part of structural hardening for a WUI residence?

• A. Roofing
• B. Windows
• C. Chimneys
• D. Interior paint color

Answer: (D)

Structural hardening focuses on making the building itself more resistant to wildfire ignition and ember intrusion. The components that contribute to this protection are those that directly affect how heat, flames, and embers interact with the structure—roofing materials and installation to resist ignition, window assemblies that withstand heat and ember exposure, and chimneys with spark arrestors and proper clearance to prevent embers from starting a fire. Interior paint color, on the other hand, has no impact on how easily the structure ignites or how embers behave around it; it’s purely cosmetic and does not alter the building’s defensive performance. So interior paint color is not considered part of structural hardening.