Which statement best describes Zone 0-5 ft defensible space?

• A. Aesthetic landscaping.
• B. Immediate protection around the structure with ignition-resistant materials.
• C. No defined purpose.
• D. Extended defensible space to slow fire.

Answer: (B)

Immediate protection around the structure with ignition-resistant materials is what Zone 0-5 ft defensible space is all about. This is the closest-in area where the building is most vulnerable to embers and radiant heat, so the emphasis is on making surfaces and surrounding fuels as resistant as possible. Using noncombustible or ignition-resistant materials for exterior walls, vents, and openings helps prevent an ember from igniting the structure, while keeping vegetation and other fuels out of this narrow strip reduces the chance of ignition from close flames or radiant heat. Aesthetic landscaping near the foundation can become fuel and isn’t appropriate there. The idea of no defined purpose is incorrect because this zone is specifically meant to provide a shield of ignition resistance right up against the structure. Extended defensible space to slow fire refers to areas beyond this immediate zone, not the 0-5 ft strip.