{"id":"us-co","slug":"colorado","name":"Colorado","license":"CC-BY-4.0","placeNode":"/places/us-co.json","construction":{"reviewStatus":"live","applications":[{"id":"cwrc-2025-colorado","title":"Colorado 2025 CWRC local-adoption path","instrumentId":"cwrc-2025","placeId":"us-co","status":"available-for-local-adoption","geographicScope":"mapped-area","scopeSummary":"Colorado has published the 2025 Wildfire Resiliency Code for adoption by named jurisdictions; the local ordinance, official hazard map, and project class determine whether a requirement reaches a project.","requirementIds":["cwrc-2025-class-2-20-minute-exterior-door","cwrc-2025-class-2-class-a-deck-surface","cwrc-2025-class-2-multilayered-glazing","cwrc-2025-class-2-noncombustible-deck-structure","cwrc-2025-class-2-noncombustible-deck-surface","cwrc-2025-class-2-noncombustible-eave","cwrc-2025-class-2-noncombustible-exterior-door","cwrc-2025-class-2-noncombustible-exterior-wall","cwrc-2025-class-2-solid-core-exterior-door","cwrc-2025-class-2-wall-base-protection","cwrc-2025-class-a-roof-assembly","cwrc-2025-immediate-zone-hardscape","cwrc-2025-near-structure-fence","cwrc-2025-noncombustible-gutters","cwrc-2025-roof-profile-closure","cwrc-2025-roof-valley-flashing","cwrc-2025-vent-mesh"],"requirementCoverage":"partial","unresolvedPredicates":["local-adoption","official-hazard-map","project-type","official-confirmation"],"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z","documentDate":"2025-07-01T00:00:00.000Z"},"author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-25T00:00:00.000Z"}],"localApplications":[],"requirements":[],"sources":[{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"},{"title":"Wildfire Resiliency Code Board","url":"https://dfpc.colorado.gov/sections/wildfire-resiliency-code-board","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}]},"localAuthorities":[],"claims":{"exact":[{"id":"guide:class-a-does-not-age-on-a-clock:3","anchor":"local-us-co-class-a-does-not-age-on-a-clock-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.2 requires a Class A roof covering or roof assembly tested to ASTM E108 or UL 790. CWRC 101.6 sends existing roofs that replace 25 percent or more of the covering to that new-construction roof. The published sections do not print a year when Class A expires. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"class-a-does-not-age-on-a-clock","title":"A Class A rating is not a service-life clock","url":"/guides/class-a-does-not-age-on-a-clock/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:address-signs:2","anchor":"local-us-co-address-signs-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 502.2.3 is a Class 1 site rule. Buildings shall have a permanently posted address at each driveway entrance, visible from both directions of travel along the road. Post it at the beginning of construction and keep it maintained. It shall be visible and legible from the road in a manner the code official approves. Class 2 includes this rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"address-signs","title":"Address signs firefighters can find","url":"/guides/address-signs/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:r104-11-alternate-methods:4","anchor":"local-us-co-r104-11-alternate-methods-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 104.7.3 requires a written application for alternative materials, design, and methods under 104.2.2, and for modifications under 104.2.3, plus written documentation of the code official's final decision. That is not Oregon R104.11. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"r104-11-alternate-methods","title":"Alternate materials and methods under R104.11","url":"/guides/r104-11-alternate-methods/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:artificial-turf-in-zone-0:3","anchor":"local-us-co-artificial-turf-in-zone-0-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 502.1.2 Immediate Zone materials are noncombustible hard surfaces such as rock, gravel, sand, concrete, bare earth, or stone/concrete pavers. Ignition-resistant plantings are allowed only from an AHJ-approved list not less than the Colorado State Forest Service list. The published section does not name artificial turf. Class 2 includes this Immediate Zone. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"artificial-turf-in-zone-0","title":"Artificial turf in Zone 0","url":"/guides/artificial-turf-in-zone-0/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:e119-vs-wui-wall:6","anchor":"local-us-co-e119-vs-wui-wall-6","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.3 Class 2 exterior walls include assemblies with a minimum 1-hour fire-resistance rating, rated for exposure on the exterior side, among other methods. That is not SFM 12-7A-1 and not Oregon's Type X-behind-covering path. Class 1 does not add this wall rule. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"e119-vs-wui-wall","title":"ASTM E119 versus a WUI wall test","url":"/guides/e119-vs-wui-wall/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:bird-block-soffit-unvented:7","anchor":"local-us-co-bird-block-soffit-unvented-7","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.4 covers attic, rafter, and underfloor ventilation openings with ASTM E2886 listed vents or 1/8-inch noncombustible mesh. CWRC 404.2 protects eaves and soffits on the exposed underside on Class 2 lots and requires fascia. The published sections do not use Oregon's 12-foot underside eave-vent skip. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"bird-block-soffit-unvented","title":"Bird blocks, boxed soffit, or unvented attic","url":"/guides/bird-block-soffit-unvented/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:class-a-covering-not-a-bag:2","anchor":"local-us-co-class-a-covering-not-a-bag-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.2 requires a Class A roof covering or roof assembly tested to ASTM E108 or UL 790 for Class 1 hardening. That is still a test result, not a bag of shingles. Class 2 includes this roof. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"class-a-covering-not-a-bag","title":"Class A covering is not a bag of shingles","url":"/guides/class-a-covering-not-a-bag/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:cwrc-vs-r327-vs-cwuic:1","anchor":"local-us-co-cwrc-vs-r327-vs-cwuic-1","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.2 requires a Class A roof covering or assembly (ASTM E108 or UL 790) for Class 1. 404.7 glazing is tempered, multilayered glazed panels, glass block, or a 20-minute fire-protection rating. 303.3 sends low fire intensity to Class 1 and moderate or high to Class 2. 101.1 is written to be adopted by a named jurisdiction. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"cwrc-vs-r327-vs-cwuic","title":"Colorado CWRC versus Oregon R327 versus California CWUIC","url":"/guides/cwrc-vs-r327-vs-cwuic/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:colorado-cwrc-adoption:1","anchor":"local-us-co-colorado-cwrc-adoption-1","place":"Colorado Wildfire Resiliency Code Board","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"The 2025 CWRC was established on 1 July 2025 through 8 CCR 1507-39. Governing bodies report adoption to the Board. Enforcement is the governing body’s. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"colorado-cwrc-adoption","title":"Colorado Wildfire Resiliency Code adoption","url":"/guides/colorado-cwrc-adoption/"},"source":{"title":"Wildfire Resiliency Code Board","url":"https://dfpc.colorado.gov/sections/wildfire-resiliency-code-board","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:covering-vs-assembly:5","anchor":"local-us-co-covering-vs-assembly-5","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.2 requires a Class A roof covering or roof assembly tested to ASTM E108 or UL 790 for Class 1 hardening (low fire intensity). Class 2 includes that roof rule. Existing roofs that replace 25 percent or more of the covering take the new-construction roof (101.6). Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"covering-vs-assembly","title":"Covering versus assembly","url":"/guides/covering-vs-assembly/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:craftsman-eaves-under-r327:4","anchor":"local-us-co-craftsman-eaves-under-r327-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.2 is a Class 2 rule. Eaves and soffits shall be protected on the exposed underside by noncombustible material, ignition-resistant materials, materials approved for not less than 1-hour fire-resistance-rated construction, 5/8-inch Type X drywall, 2-inch nominal lumber, or 1-inch nominal fire-retardant-treated wood or 3/4-inch nominal fire-retardant-treated plywood identified for exterior use. Fascias are required and shall be protected on the backside. Oregon's fascia exemption is not this sentence. Class 1 does not add this eave rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"craftsman-eaves-under-r327","title":"Craftsman eaves under R327","url":"/guides/craftsman-eaves-under-r327/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:crown-and-shrub-spacing:1","anchor":"local-us-co-crown-and-shrub-spacing-1","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 503.2 is Class 2 Structure Ignition Zone 2 (5-30 feet). Tree crowns extending to within 10 feet of any structure shall be pruned to maintain a minimum clearance of 10 feet (503.2.4). Shrubs shall be at least 10 feet away from the edge of tree branches (503.2.5). Class 1 Immediate Zone (0-5 feet) does not use those spacing numbers. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"crown-and-shrub-spacing","title":"Crown and shrub spacing","url":"/guides/crown-and-shrub-spacing/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:deck-ledger-and-wall:7","anchor":"local-us-co-deck-ledger-and-wall-7","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.3.2 is a Class 2 rule. At least 6 inches of metal flashing or noncombustible material applied vertically between wall sheathing and exterior cladding at decking intersections, as well as at ground and roof. Combustible sheathing exposed at the base must be protected while still draining. The published section does not name a ledger board as its own fire listing. Class 1 does not add this flashing rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"deck-ledger-and-wall","title":"Deck ledger and the wall intersection","url":"/guides/deck-ledger-and-wall/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:deck-railings:1","anchor":"local-us-co-deck-railings-1","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.6 is a Class 2 rule. Appendages and projections shall be constructed in accordance with exterior walls in 404.3. The published section does not name FEMA's 3-inch FRT railing stock. Class 1 does not add this appendage rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"deck-railings","title":"Deck railings in the WUI","url":"/guides/deck-railings/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:dual-pane-vs-tempered:5","anchor":"local-us-co-dual-pane-vs-tempered-5","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.7 is a Class 2 rule. Exterior windows, window walls, glazed doors, windows within 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. Multilayered glazed panels are a complete option. Class 1 (low fire intensity) does not add this glazing rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"dual-pane-vs-tempered","title":"Dual-pane versus tempered windows","url":"/guides/dual-pane-vs-tempered/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:exterior-frt-weathering:4","anchor":"local-us-co-exterior-frt-weathering-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 402.3 requires fire-retardant-treated wood identified for exterior use and meeting 2024 IBC Section 2303.2. CWRC 402.4.3 requires ignition-resistant building materials to keep performance under weathering, including ASTM D2898 Method A for fire-retardant-treated wood, wood-plastic composite, and plastic lumber. Class 2 walking surfaces may use that exterior FRT (404.5). Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"exterior-frt-weathering","title":"Exterior FRT wood and weathering","url":"/guides/exterior-frt-weathering/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:fence-as-wick:2","anchor":"local-us-co-fence-as-wick-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 502.4.1 is a Class 1 site rule. Fencing within 8 feet of a regulated structure, or up to the property line when that line is closer, shall be noncombustible or ignition-resistant materials. CWRC 102.10 lists fences more than 8 feet from a habitable structure among work that does not require a permit under this code. That is not an IBHS 0-5 foot combustible-fence ban. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"fence-as-wick","title":"Fence as a wick","url":"/guides/fence-as-wick/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:fire-apparatus-access:3","anchor":"local-us-co-fire-apparatus-access-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 502.2.1 is a Class 1 site rule. Approved signs or other notices shall identify access roads and driveways and prohibit obstruction. The published section does not name Oregon Fire Code width, grade, or live-load numbers. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"fire-apparatus-access","title":"Fire apparatus access on the lot","url":"/guides/fire-apparatus-access/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:fire-resistant-does-not-mean-noncombustible:2","anchor":"local-us-co-fire-resistant-does-not-mean-noncombustible-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 202 treats a material as noncombustible if no part will ignite and burn, if it conforms to ASTM E136, or if it is fire-rated gypsum board tested to ASTM C1396 with a 1-hour rating from the outside only. CWRC 502.1.2 Immediate Zone materials are noncombustible hard surfaces. Ignition-resistant plantings are allowed only from an AHJ-approved list not less than the Colorado State Forest Service list. That exception is not this site's fire-resistant rating and is not ASTM E136. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"fire-resistant-does-not-mean-noncombustible","title":"Fire-resistant plants are not noncombustible","url":"/guides/fire-resistant-does-not-mean-noncombustible/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:garage-doors-ember-path:2","anchor":"local-us-co-garage-doors-ember-path-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.9 is a Class 2 rule. Exterior vehicle access doors must keep gaps at the head, sill, and jamb from exceeding 1/8 inch, as approved by the AHJ. Weather-stripping, door overlaps, or metal flashing on jambs and headers are the named methods. Class 1 (low fire intensity) does not add this door rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"garage-doors-ember-path","title":"Garage doors as an ember path","url":"/guides/garage-doors-ember-path/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:gravel-under-the-deck:2","anchor":"local-us-co-gravel-under-the-deck-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.4 is a Class 2 rule. Buildings shall have underfloor areas enclosed to the ground or comply with exterior walls in 404.3. Gravel is not named as an underside material. Class 1 does not add this underfloor rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"gravel-under-the-deck","title":"Gravel and pavers under the deck","url":"/guides/gravel-under-the-deck/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:gutters-and-debris:3","anchor":"local-us-co-gutters-and-debris-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.3 requires gutters and downspouts of noncombustible material for Class 1 hardening (low fire intensity). Class 2 includes that rule. The published section does not add a debris-screen sentence. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"gutters-and-debris","title":"Gutters and debris as an ember bed","url":"/guides/gutters-and-debris/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:heavy-timber-and-log-walls:2","anchor":"local-us-co-heavy-timber-and-log-walls-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.3 option 3 allows heavy timber or log wall construction as a Class 2 exterior wall method. Log wall construction in this book is solid wood members with the smallest horizontal dimension not less than 6 inches, following ICC 400. Class 1 does not add this wall rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"heavy-timber-and-log-walls","title":"Heavy timber and log walls under R327","url":"/guides/heavy-timber-and-log-walls/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:hardening-ladder:4","anchor":"local-us-co-hardening-ladder-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 101.5 through 101.7 name existing-building triggers, not this CAL FIRE/FEMA ladder. A 500-square-foot footprint addition, a 25 percent roof replacement, and a 25 percent exterior-wall replacement take new-construction hardening, including Immediate Zone on the wall trigger. Class 1 is roof, gutters, and vents. Class 2 includes Class 1 and adds eaves, walls, decks, glazing, and doors. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"hardening-ladder","title":"Home-hardening ladder","url":"/guides/hardening-ladder/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:intumescent-vents:3","anchor":"local-us-co-intumescent-vents-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.4 ventilation openings for enclosed attics, enclosed rafter spaces, and underfloor spaces are listed vents tested to ASTM E2886, or noncombustible corrosion-resistant mesh not more than 1/8 inch. An intumescent core is construction inside a listed assembly, not the mesh path. Class 1 and Class 2 both take this vent rule. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"intumescent-vents","title":"How an intumescent vent closes","url":"/guides/intumescent-vents/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:how-wui-is-mapped:4","anchor":"local-us-co-how-wui-is-mapped-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC Chapter 3 is a construction overlay, not Radeloff's census WUI. The AHJ declares wildland-urban interface areas (302.1). Wildfire hazard is recorded on official maps available online (303.1). Fire intensity is low, moderate, or high (303.2). Low takes Class 1 hardening. Moderate or high takes Class 2 (303.3). That is not a CAL FIRE FHSZ map and not the 2005 national WUI layer. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"how-wui-is-mapped","title":"How the WUI is mapped","url":"/guides/how-wui-is-mapped/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:how-to-read-a-class-a-roof-listing:4","anchor":"local-us-co-how-to-read-a-class-a-roof-listing-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.2 requires a Class A roof covering or roof assembly tested to ASTM E108 or UL 790. That is still covering-plus-deck as tested, not an OSFM 8180 mandate. Class 1 and Class 2 both take this roof. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"how-to-read-a-class-a-roof-listing","title":"How to read a Class A roof listing","url":"/guides/how-to-read-a-class-a-roof-listing/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:how-to-read-a-state-page:3","anchor":"local-us-co-how-to-read-a-state-page-3","place":"Colorado Wildfire Resiliency Code Board","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"The 2025 CWRC is a sourced statewide construction book. CWRC 101.1 is still written to be adopted by a named jurisdiction. Live on this site is not a parcel read.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"how-to-read-a-state-page","title":"How to read a state page","url":"/guides/how-to-read-a-state-page/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:ibhs-does-not-replace-code:2","anchor":"local-us-co-ibhs-does-not-replace-code-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Where a named jurisdiction adopts CWRC, that book is construction code. IBHS Wildfire Prepared remains a designation. Passing one does not prove the other. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"ibhs-does-not-replace-code","title":"IBHS does not replace adopted code","url":"/guides/ibhs-does-not-replace-code/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:ignition-resistant-vs-noncombustible:1","anchor":"local-us-co-ignition-resistant-vs-noncombustible-1","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 402.2 treats noncombustible as the Section 202 definition, including ASTM E136. CWRC 402.3 is fire-retardant-treated wood for exterior use meeting 2024 IBC 2303.2. CWRC 402.4 is ignition-resistant building material tested on both faces to the extended ASTM E84 or UL 723 30-minute run, or ASTM E2768, with flame spread not exceeding 25 and flame front not more than 10 feet 6 inches. They are separate covering paths. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"ignition-resistant-vs-noncombustible","title":"Ignition-resistant versus noncombustible","url":"/guides/ignition-resistant-vs-noncombustible/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"standard:iwuic:3","anchor":"local-us-co-iwuic-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":"cwrc-2025","claim":"Colorado’s published book is the 2025 Colorado Wildfire Resiliency Code. In designated wildfire hazard areas, low fire-intensity maps take Class 1 hardening and moderate or high take Class 2. The title is written to be adopted by a named jurisdiction. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"standard","id":"iwuic","title":"International Wildland-Urban Interface Code","url":"/standards/iwuic/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"standard:iwuic:4","anchor":"local-us-co-iwuic-4","place":"Colorado 8 CCR 1507-39","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":"cwrc-2025","claim":"The Wildfire Resiliency Code Board established the 2025 CWRC on 1 July 2025 through 8 CCR 1507-39. Governing bodies report adoption to the Board. That is not Oregon R327 city-by-city opt-in and not California CWUIC.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"standard","id":"iwuic","title":"International Wildland-Urban Interface Code","url":"/standards/iwuic/"},"source":{"title":"Wildfire Resiliency Code Board","url":"https://dfpc.colorado.gov/sections/wildfire-resiliency-code-board","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:ladder-fuels:1","anchor":"local-us-co-ladder-fuels-1","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 503.2.2 requires hazardous dead plant material to be removed from live vegetation in the 5-30 foot zone. CWRC 503.2.4 requires tree crowns within 10 feet of a structure to be pruned to a 10-foot clearance. The published sections do not use CAL FIRE's \"three times shrub height\" example. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"ladder-fuels","title":"Ladder fuels","url":"/guides/ladder-fuels/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:manufactured-homes-in-the-wui:2","anchor":"local-us-co-manufactured-homes-in-the-wui-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 101.2.3. HUD Code homes are exempt from structure hardening on their first installation. Homes moved into an applicable Wildfire Resiliency code area are subject to this code as required by the AHJ. Factory-built structures follow Division of Housing 8 CCR 1302-1, not this chapter (101.2.2). Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"manufactured-homes-in-the-wui","title":"Manufactured homes in fire country","url":"/guides/manufactured-homes-in-the-wui/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:mesh-vs-listed-vents:3","anchor":"local-us-co-mesh-vs-listed-vents-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.4 requires attic, rafter, and underfloor vents to be listed to ASTM E2886, or covered with noncombustible corrosion-resistant mesh with openings not more than 1/8 inch. Those are two Class 1 paths. Class 2 still includes the Class 1 vent rules. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"mesh-vs-listed-vents","title":"Mesh versus listed vents","url":"/guides/mesh-vs-listed-vents/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:r327-vs-cwuic:9","anchor":"local-us-co-r327-vs-cwuic-9","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Colorado’s published book is the 2025 CWRC, not R327 and not CWUIC. Low fire intensity takes Class 1 hardening. Moderate or high takes Class 2 (303.3). The title is written to be adopted by a named jurisdiction. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"r327-vs-cwuic","title":"Oregon R327 versus California CWUIC","url":"/guides/r327-vs-cwuic/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:listed-is-voluntary:2","anchor":"local-us-co-listed-is-voluntary-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.4 names listed vents tested to ASTM E2886 as one attic, rafter, and underfloor path, or 1/8-inch noncombustible mesh. That listed path is this book's construction rule, not an OSFM handbook mandate. Absence from the California handbook is not a Colorado ban. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"listed-is-voluntary","title":"OSFM listing is usually voluntary","url":"/guides/listed-is-voluntary/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:pergolas-and-patio-covers:2","anchor":"local-us-co-pergolas-and-patio-covers-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.6 is a Class 2 rule. Appendages and projections shall be constructed in accordance with exterior walls in 404.3. The published section does not use Oregon's 200 square foot patio-ceiling sentence or IBHS 15 percent slat coverage. Class 1 does not add this projection rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"pergolas-and-patio-covers","title":"Pergolas and patio covers as projections","url":"/guides/pergolas-and-patio-covers/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:plastic-skylights:2","anchor":"local-us-co-plastic-skylights-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.7 is a Class 2 rule. Exterior windows, window walls, glazed doors, windows within 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. Plastic domes are not on that list. Class 1 does not add this glazing rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"plastic-skylights","title":"Plastic skylights under R327 and CWUIC","url":"/guides/plastic-skylights/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:r327-remodels-when-the-answer-is-no:4","anchor":"local-us-co-r327-remodels-when-the-answer-is-no-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 101.5. Additions or alterations that increase the footprint by 500 square feet or more shall conform to new-building requirements. CWRC 101.6. Existing roofs that replace 25 percent or more of the covering take the new-construction Class A roof. CWRC 101.7. Existing walls that replace 25 percent or more of the exterior wall surface take new-construction walls and the Immediate Zone within 5 feet. CWRC 102.10 lists smaller additions and under-25-percent roof or wall work among work for which compliance with this code is not required. That is not Oregon BCD's typical-addition skip. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"r327-remodels-when-the-answer-is-no","title":"R327 remodels when the answer is no","url":"/guides/r327-remodels-when-the-answer-is-no/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:retrofit-existing-house:4","anchor":"local-us-co-retrofit-existing-house-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 101.5. Additions or alterations that increase the footprint by 500 square feet or more shall conform to new-building requirements. CWRC 101.6. Existing roofs that replace 25 percent or more of the covering take the new-construction Class A roof. CWRC 101.7. Existing walls that replace 25 percent or more of the exterior wall surface take new-construction walls and the Immediate Zone within 5 feet. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"retrofit-existing-house","title":"Retrofit the house you already have","url":"/guides/retrofit-existing-house/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:ridge-vents-vs-e2886:3","anchor":"local-us-co-ridge-vents-vs-e2886-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.4 covers ventilation openings for enclosed attics, enclosed rafter spaces, and underfloor spaces. Paths are listed vents tested to ASTM E2886, or noncombustible corrosion-resistant mesh with openings not more than 1/8 inch. The published section does not reprint California's off-ridge and ridge-vent mesh sentence or Oregon's 1/16 to 1/8 inch range. Class 1 and Class 2 both take this vent rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"ridge-vents-vs-e2886","title":"Ridge vents versus ASTM E2886","url":"/guides/ridge-vents-vs-e2886/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:roof-to-wall-and-dormer-cheeks:3","anchor":"local-us-co-roof-to-wall-and-dormer-cheeks-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.3.2 is a Class 2 flashing rule. At least 6 inches of metal flashing or noncombustible material applied vertically between wall sheathing and exterior cladding at ground, decking, and roof intersections. Combustible sheathing exposed at the base must be protected while still draining. That is the roof-to-wall flash this book names. Class 1 does not add this flashing rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"roof-to-wall-and-dormer-cheeks","title":"Roof-to-wall transitions and dormer cheeks","url":"/guides/roof-to-wall-and-dormer-cheeks/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:stucco-in-the-wui:2","anchor":"local-us-co-stucco-in-the-wui-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.3.1 limits Class 2 exterior wall coverings to noncombustible materials, fire-retardant-treated wood, or ignition-resistant building materials. Stucco is not named as its own path. Noncombustible in 202 includes ASTM E136 and fire-rated gypsum board tested to ASTM C1396 with a 1-hour rating from the outside only. Class 1 does not add this covering rule. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"stucco-in-the-wui","title":"Stucco in the WUI","url":"/guides/stucco-in-the-wui/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:twelve-foot-rule:4","anchor":"local-us-co-twelve-foot-rule-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.2 is a Class 2 eave rule. Eaves and soffits shall be protected on the exposed underside. The published section does not use Oregon's 12-foot height skip. Fascias are required and shall be protected on the backside. Class 1 does not add this eave rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"twelve-foot-rule","title":"The 12-foot rule","url":"/guides/twelve-foot-rule/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:two-by-lumber-deck-exception:4","anchor":"local-us-co-two-by-lumber-deck-exception-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.5 is a Class 2 rule for unenclosed deck walking surfaces. Approved noncombustible, Class A rated material (composite may be Class B), fire-retardant-treated wood identified for exterior use, or ignition-resistant building materials. It does not carry Oregon's 200 square foot 2-inch lumber exception. Class 1 does not add this deck rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"two-by-lumber-deck-exception","title":"The 200 square foot 2-inch lumber deck exception","url":"/guides/two-by-lumber-deck-exception/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:wall-base-clearance:2","anchor":"local-us-co-wall-base-clearance-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.3.2 is a Class 2 flashing rule. At least 6 inches of metal flashing or noncombustible material applied vertically between wall sheathing and exterior cladding at the ground, decking, and roof intersections. Combustible sheathing exposed at the base must be protected while still draining. Class 1 does not add this flashing rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"wall-base-clearance","title":"The wall base and the six-inch band","url":"/guides/wall-base-clearance/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:tile-bird-stops:2","anchor":"local-us-co-tile-bird-stops-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.2.1 is a Class 1 roof rule. Where the covering profile creates a space between covering and deck, resist flames and embers by firestopping with noncombustible material, installing one layer of ASTM D3909 cap sheet over the combustible deck, or installing a listed Class A classified roof assembly. That third path is not Oregon's 72-pound cap-sheet sentence. Class 2 includes this rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"tile-bird-stops","title":"Tile bird stops and roof-profile gaps","url":"/guides/tile-bird-stops/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:type-x-path:4","anchor":"local-us-co-type-x-path-4","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.2 is a Class 2 eave rule. 5/8-inch Type X drywall is one underside protection material, listed with noncombustible, ignition-resistant, 1-hour construction, 2-inch nominal lumber, and exterior fire-retardant-treated wood. That sentence does not reprint Oregon's Type X-behind-covering wall recipe. Class 1 does not add this eave rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"type-x-path","title":"Type X behind the covering","url":"/guides/type-x-path/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:unvented-attic:1","anchor":"local-us-co-unvented-attic-1","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.4 requires ventilation openings for enclosed attics, enclosed rafter spaces, and underfloor spaces to be listed to ASTM E2886 or covered with noncombustible corrosion-resistant mesh not more than 1/8 inch. It does not name Deschutes' unvented-attic option. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"unvented-attic","title":"Unvented attic as a wildfire path","url":"/guides/unvented-attic/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:valley-flashing-r327:2","anchor":"local-us-co-valley-flashing-r327-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 403.2.2 is a Class 1 roof rule. Valley flashings shall be not less than 0.019 inch (No. 26 galvanized sheet gage) corrosion-resistant metal installed over a minimum 36-inch-wide underlayment consisting of one layer of cap sheet complying with ASTM D3909 running the full length of the valley. That sentence does not name Oregon's 72-pound cap sheet. Class 2 includes this rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"valley-flashing-r327","title":"Valley metal and cap sheet under R327.3","url":"/guides/valley-flashing-r327/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:vinyl-siding-in-the-wui:2","anchor":"local-us-co-vinyl-siding-in-the-wui-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.3.1 limits Class 2 exterior wall coverings to noncombustible, fire-retardant-treated wood, or ignition-resistant building materials. Vinyl siding may be used as an exterior covering where the wall assembly is 1-hour fire-resistance-rated for exterior exposure or approved noncombustible materials (404.3 options 1 or 2). Vinyl is not a covering path on the other Class 2 wall options. Class 1 does not add this wall-covering rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"vinyl-siding-in-the-wui","title":"Vinyl siding in the WUI","url":"/guides/vinyl-siding-in-the-wui/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:wall-covering-termination:3","anchor":"local-us-co-wall-covering-termination-3","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.3.2 is a Class 2 flashing and base-protection rule, not Oregon's foundation-to-roof 2-inch blocking sentence. At least 6 inches of metal flashing or noncombustible material at ground, decking, and roof intersections. Combustible sheathing exposed at the base must be protected while still draining. Class 1 does not add this rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"wall-covering-termination","title":"Wall covering termination under R327.3.3.1","url":"/guides/wall-covering-termination/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:what-survives-hail-drought-and-embers-at-7000-feet:1","anchor":"local-us-co-what-survives-hail-drought-and-embers-at-7000-feet-1","place":"CSU Extension Fact Sheet 6.305 (2025)","placeId":"us-co","scopeKind":"place","scopeMode":"descendants","scopeRef":null,"claim":"Zones: 1 is 0–5 feet, 2 is 5–30 feet, 3 is 30–100 feet. This fact sheet covers plants in zones 1 and 2. Methodology from Idaho Firewise rates flammability 0–10 (10 least flammable). Plant only scores of 8, 9, and 10 in zones 1 and 2 within the first 30 feet. There are no truly fireproof plant species. Moisture content is the single most important factor governing volatility; resin can keep some species flammable even when well watered. Drought tolerance is named among attributes that decrease flammability. Most of Colorado’s native vegetation is adapted to fire and is flammable. Common flammable shrubs: Gambel oak, three-leaf sumac, and mountain mahogany. Planting those is discouraged in zones 1 and 2. Table 1: Penstemon strictus 5–10K, L–M water, score 8. Sedum lanceolatum 5–10K, M water, score 10. Achillea millefolium (as A. lanulosa) 5–10K, L–H water, score 9.5. Hail is not a scored column.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"what-survives-hail-drought-and-embers-at-7000-feet","title":"What survives hail, drought, and embers at 7,000 feet","url":"/guides/what-survives-hail-drought-and-embers-at-7000-feet/"},"source":{"title":"Firewise Plant Materials (CSU Fact Sheet 6.305)","url":"https://extension.colostate.edu/resource/firewise-plant-materials/","publisher":"Colorado State University Extension","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z","documentDate":"2025-05-01T00:00:00.000Z"}},{"id":"guide:r327-adu-and-shops:5","anchor":"local-us-co-r327-adu-and-shops-5","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.10 is a Class 2 rule. Detached accessory structures less than 50 feet from a building containing habitable or occupiable space shall have exterior walls per 404.3 through 404.3.2. CWRC 401.1 excepts one-story nonhabitable accessory structures not more than 120 square feet and at least 10 feet from the nearest occupiable structure, and Group U accessory buildings of any size at least 50 feet from occupiable or habitable space. That is not Oregon's 400-square-foot accessory sentence. Confirm the local ordinance.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"r327-adu-and-shops","title":"When R327 hits an ADU, garage, or shop","url":"/guides/r327-adu-and-shops/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:wui-door-vs-fire-door:5","anchor":"local-us-co-wui-door-vs-fire-door-5","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 404.8 is a Class 2 rule. Exterior doors shall be approved noncombustible construction, solid core wood not less than 1 3/4 inches thick, or have a fire protection rating of not less than 20 minutes. Windows within doors and glazed doors follow 404.7. Vehicle access doors are excepted from 404.8 and instead follow the 1/8 inch perimeter-gap rule in 404.9. Class 1 does not add this swinging-door rule. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"wui-door-vs-fire-door","title":"WUI doors versus 20-minute fire doors","url":"/guides/wui-door-vs-fire-door/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:zone-0-california-oregon-firewise:2","anchor":"local-us-co-zone-0-california-oregon-firewise-2","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC 502.1 is Class 1 Structure Ignition Zone 1, 0-5 feet (Immediate Zone). Use noncombustible hard surface materials such as rock, gravel, sand, concrete, bare earth, or stone/concrete pavers. Ignition-resistant plantings are allowed only from an AHJ-approved list that is not less than the Colorado State Forest Service list. No new trees. Mature trees of no less than 10-inch diameter at 4.5 feet above ground may be maintained. Class 2 includes this Immediate Zone. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"zone-0-california-oregon-firewise","title":"Zone 0 in California, Oregon, Firewise, and IBHS","url":"/guides/zone-0-california-oregon-firewise/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}},{"id":"guide:zone-bands:1","anchor":"local-us-co-zone-bands-1","place":"Colorado Wildfire Resiliency Code 2025","placeId":"us-co","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"CWRC uses three Structure Ignition Zones. Class 1 site rules include Zone 1 Immediate 0-5 feet (502.1). Class 2 adds Zone 2 Intermediate 5-30 feet (503.2) and Zone 3 Expanded 30-100 feet (503.3), and includes the Class 1 Immediate Zone. Those distances are this book, not IBHS Essential and not California Zone 0. Confirm the local ordinance.","asOf":"2026-08-24T00:00:00.000Z","object":{"kind":"guide","id":"zone-bands","title":"Zone 0 versus Zone 1 versus Zone 2","url":"/guides/zone-bands/"},"source":{"title":"2025 Colorado Wildfire Resiliency Code","url":"https://dfpc.colorado.gov/colorado-wildfire-resiliency-code","publisher":"Colorado Division of Fire Prevention and Control","sourceType":"official","accessedOn":"2026-08-24T00:00:00.000Z"}}],"local":[]},"placeFocusedGuides":[{"id":"cwrc-vs-r327-vs-cwuic","title":"Colorado CWRC versus Oregon R327 versus California CWUIC","url":"/guides/cwrc-vs-r327-vs-cwuic/"},{"id":"colorado-cwrc-adoption","title":"Colorado Wildfire Resiliency Code adoption","url":"/guides/colorado-cwrc-adoption/"},{"id":"what-survives-hail-drought-and-embers-at-7000-feet","title":"What survives hail, drought, and embers at 7,000 feet","url":"/guides/what-survives-hail-drought-and-embers-at-7000-feet/"}],"findings":[],"plants":{"grain":"state","total":401,"nativeDocumented":14,"invasiveOrNoxiousFlagged":86,"fireResistant":220,"keepAway":33,"conflicts":6,"page":"/grow/colorado/"},"fireEvidencePublicationScope":{"answerGrain":"typed-state-source","sourceCount":1}}