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Building Upgrades to Further Protect Against Wildfire
Level Up!
After addressing the critical building prep, this group of exterior building improvements will give your structure an additional level of protection against flame exposure during a wildfire.
Wildfire Ready Business Guide
Know what steps will significantly improve the likelihood of your building’s survival.
1) For steep-slope roofs, enclose the underside of eaves and overhangs
- Enclose eaves and overhangs on the underside by installing noncombustible or ignition-resistant soffits (e.g., a noncombustible siding material) or 2-inch or thicker lumber.
- Remember, all soffit vents should be covered with 1/8-inch metal wire mesh.

2) Cover gutters
- Install noncombustible gutter guards.
- Ensure gutter guards are clear of tree debris.

3) Move structures farther away from your building
- Move structures like sheds, gazebos, garbage containment, covered sitting areas, and other outbuildings at least 30 feet away from the building.
- Ensure storage of combustible materials does not exceed 10 feet in height and is located at least 50 feet away from the building.
- Store large quantities of combustible and flammable liquids at least 50 feet away from the building or in detached noncombustible buildings.
- Move LP tanks at least 50 feet from the building and other structures on the property.

4) Upgrade windows and doors
Windows
- Replace all exterior single pane and annealed windows with tempered, multipaned glass or glass blocks, especially first floor windows on a multi-story business.
Doors
- Upgrade exterior personnel doors to solid exterior doors that have a metal threshold and are constructed with a noncombustible or ignition-resistant material such as metal, fiberglass or solid hardwood.
- If you choose a door that includes glass, make sure it is made with tempered, multipaned glass.

5) Install noncombustible wall cladding
- Replace combustible wall cladding including wood, wood-fiber, or vinyl with a noncombustible material that meets ASTEM E136 like concrete, brick, stucco, or stone veneer.
- Install noncombustible business name signage.

6) Enclose under extruded exterior wall
- Enclose the area underneath a ground floor exterior wall extrusions with noncombustible cladding.

7) Build fire-resistant building attachments (i.e., decks, ramps, patios, balconies)
- When designing a new building attachment, use metal joists and a fire-resistant walking surface such as fire-rated composite, aluminum, or lightweight concrete.
- When retrofitting an existing building attachment, use noncombustible materials such as metal, stone veneer, or lightweight concrete to:
- Ensure the bottom 6 inches of posts are noncombustible.
- Select noncombustible hand railings especially in the first 5 feet attached to the building.
- Choose a solid (no gap), noncombustible walking surface, including the stairs.

8) Remove back-to-back fencing
- If you and your neighbor(s) have separate, parallel fences that are less than 5 feet apart, work with your neighbor to remove any sections of back-to-back fencing.

9) Improve site access and fire-fighting capabilities
Provide proper building identification
- Building identification should be provided at each vehicle access entrance and should be visible from both directions of travel.
- Street numbers should be at least 4 inches high, reflective, and applied on a contrasting background.
Ensure proper emergency vehicle access
- Entrances and driveways should be at least 12 feet wide with at least 13.5 feet of vertical clearance between the roadway and vegetation.
- The angle of approach and departure should be designed to allow for emergency vehicle access without damaging the equipment when entering or leaving the driveway.
Access for gated properties
- The gate should open inward and have an entrance at least 2 feet wider than the driveway.
- Locate gates at least 30 feet from a roadway intersection.
- If secured, the gate should have a key box or lock of a type approved by the local Authority Having Jurisdiction (AHJ).
Fire hydrants
- Place fire hydrants within 250–500 feet from the building and connect them to a reliable public or private water supply.
- If there are no fire hydrants within 500 feet of the building, contact the fire AHJ, or the local water department to find alternatives.

10) Work with your neighbors and community
- Talk to your neighbors and other business owners about wildfire, what you’ve proactively done and how they can make improvements.
- Work with community-organized fire safe councils to help spread the message and prepare for wildfire at scale.
