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Defensible Space

3/8

FireScore module · three zones

How fire moves through your property.

Every home in the WUI has three concentric defense zones. The FireScore module assesses each one independently and scores the weakest first.

Immediate zone — 0 – 5 ft

Immediate

0 – 5 ft

Non-combustible materials only. No vegetation touching the structure. Gravel, stone, or hardscape against the foundation.

Intermediate zone — 5 – 30 ft

Intermediate

5 – 30 ft

Spaced trees, trimmed shrubs, fire-resistant landscaping. Mowed grass and irrigated plantings.

Extended zone — 30 – 100 ft

Extended

30 – 100 ft

Thinned trees, reduced ground fuel, managed vegetation. Breaks in the canopy slow an approaching fire.