Wildland-Urban Interface

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Wildland-Urban Interface Map

In order to determine if your property is considered Wildland-Urban Interface, please enter your address in the interactive map.

Wildland-Urban Interface Building Requirements

Buildings and structures constructed, modified, or relocated into or within the Wildland Urban Interface area, and is within 50 feet of the natural vegetation fuel load shall meet the construction requirements of the International Wildland-Urban Interface Code Class 1 ignition-resistant construction, as per Sandy City ordinance. The following items are included in Class 1 ignition-resistant construction:

  • Roofs shall have a Class A roof covering (shingles) or a Class A roof assembly. Where the profile allows a space between the roof covering and roof decking, the space at the eave ends shall be fire stopped to preclude entry of flames or embers.
  • Eaves and soffits shall be protected on the exposed underside by materials approved for a minimum of 1 hour fire-resistance-construction or 2 inch nominal dimension lumber or 1 inch nominal fire-retardant-treated lumber or ¾ inch nominal fire-retardant-treated plywood identified for exterior use and meeting the requirements of the International Building Code.
  • Gutters and downspouts shall be constructed of noncombustible material.
  • Exterior walls shall be constructed with materials approved for a minimum of 1 hour fire-resistance-rated construction. Such material shall extend from the foundation to the underside of the roof sheathing
  • Exterior windows, window walls, glazed doors, windows within the exterior doors and skylights shall be tempered glass, multilayered glazed panels, glass block, or have a fire protection rating of not less than 20 minutes.
  • Exterior doors shall be approved noncombustible construction, solid core not less than 1 ¾ inch thick or have a fire protection rating of not less than 20 minutes.
  • Attic ventilation openings, foundation, under-floor vents or other ventilation openings in vertical exterior walls and vents through roofs shall not exceed 144 square inches each. Such vents shall be covered with noncombustible corrosion-resistant mesh with openings not to exceed ¼ inch.
  • Attic ventilation openings shall not be located in soffits, eave overhangs, between rafters at eaves, or other overhang areas. Gable end and dormer vents shall be located at least 10 feet from property lines.
  • Unenclosed accessory structures attached to buildings with habitable spaces, such as decks, shall be a minimum of 1 hour fire-resistance-rated construction, heavy timber construction or constructed of approved noncombustible materials or fire-retardant-treated wood identified for exterior use and meeting the requirements of the International Building Code. When the attached structure is located or constructed so that the structure or any portion thereof projects over a descending slope surface greater than 10 percent, the area below the structure shall have all under-floor areas enclosed to within 6 inches of the ground with, exterior wall construction being a minimum of 1 hour fire-resistance-rated construction.

If you are building in a Wildland-Urban Interface area within Sandy City or have any further questions concerning these requirements, please contact the Sandy City Fire Marshal to discuss inspection requirements prior to combustible construction at (801) 568-2930.