Wildfire-Prone Areas Yana Valachovic Steve Quarles UC Cooperative - - PowerPoint PPT Presentation

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Wildfire-Prone Areas Yana Valachovic Steve Quarles UC Cooperative - - PowerPoint PPT Presentation

Nov 19, 2023 367 likes •508 views

Home Survival in Landscaping and home design for wildfire defense Wildfire-Prone Areas Yana Valachovic Steve Quarles UC Cooperative Extension February 25, 2019 Take home points We dont fight earthquakes, tornados, or hurricanes. We

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Landscaping and home design for wildfire defense

Home Survival in Wildfire-Prone Areas

Yana Valachovic Steve Quarles

UC Cooperative Extension February 25, 2019

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Take home points

➢ We don’t fight earthquakes, tornados, or

  • hurricanes. We adapt and build smarter.

➢ The majority of homes are lost from embers ➢ New building codes are helping ➢ Need to incentivize upgrades to existing homes ➢ PRC 4290 defensible space ✓ Need a 5-foot noncombustible zone

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Ember / Firebrand Radiant Heat

Tennessee Division of Forestry

Flame Contact

How a house burns from wildfire?

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We Know That …

Wind-blown embers are responsible for the majority of building ignitions

Angora Fire – South Lake Tahoe

USDA FS, R5-TP-015

Embers

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Structure Survival Priorities for Wildland Fire : ① Roof / Edge ② Vents ③ Vegetation/Defensible Space ④ Windows ⑤ Decks ⑥ Siding

Ember, radiant, and/or flame impingement exposures from near- home vegetation, other structures, and wildfire Exposure from embers that may have been blown a mile or more. Embers can also ignite near-home vegetation and debris.

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Points of Entry

Rain gutter to roof edge Fence to house Roof to wall Ember entry via gable end vent Ember entry via under-eave vents

Insurance Institute for Business and Home Safety Photo: Tom Welch

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Defensible Space Reduced Fuel Zone

30 ft. Defensible Space Zone 30 ft. to 100 ft. Reduced Fuel Zone:

PRC 4291 Defensible Space Two zones:

0’- 30’ - Defensible Space Zone 30’ - 100’ - Reduced Fuel Zone

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Ember damage in Paradise 2018 Outside Cushion

Photos: Y. Valachovic

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Carr Fire 2018: broken windows from burned shrubs near the house Photo Y. Valachovic

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Work from the house out

Defensible space includes:

Zone 1: 0-5 feet “non- combustible zone” Zone 2: 5-30 feet “lean and green zone” Zone 3: 30-100 feet or to the property line “reduced fuel zone”

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What does a Paradise Camp Fire survivor look like?

Photos: Y. Valachoic

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For more information visit:

  • http://disastersafety.org/wpcontent/uploads/2017/03/WF_California_IBHS.pdf
  • https://disastersafety.org/ibhs/ibhs-nfpa-wildfire-research-fact-sheets/