direct flame impact
The first two can be addressed by creating appropriate defensible space. Studies and post-fire analyses illustrate that defensible space of 30 feet is sufficient to limit ignition potential—the short heat pulse produced during a wildfire.
Ember exposure is the main fire vector leading to well over half of all structure losses during wildfires. Embers are lofted high into the air and can travel several miles before dropping to the ground. Ignition can occur if receptive fuel beds are present.
Ensure the area within 30 feet directly adjacent to structures is “clean and green,” without continuous fuel leading to the home. In our area, ponderosa pines drop about one-third of their needles in the fall; be sure to clear these from roofs and gutters and rake them away from your house.
Defensible space has many attributes including:
- ignition resistant construction materials
- non-combustible roof
- paved walkways or gravel surrounding the home
- screened vents
- low flammability landscape plant selection
- well-thinned surrounding forest.
To learn about landscaping with Firewise Plant Materials, see this helpful pdf: Firewise Plant Materials