{"id":"us-pa","slug":"pennsylvania","name":"Pennsylvania","license":"CC-BY-4.0","placeNode":"/places/us-pa.json","construction":{"reviewStatus":"live","applications":[{"id":"iwuic-2021-pennsylvania","title":"Pennsylvania Uniform Construction Code incorporates IWUIC 2021","instrumentId":"iwuic-2021","placeId":"us-pa","status":"active","geographicScope":"statewide","scopeSummary":"34 Pa. Code § 403.21(a)(11) adopts and incorporates by reference the International Wildland-Urban Interface Code of 2021 as part of the Uniform Construction Code. The November 7, 2025 amendment is effective January 1, 2026, and the State's final report says the 2021 IWUIC was adopted without modification. Whether a given lot is in a wildland-urban interface, which ignition-resistant class applies, and whether a given project type is in scope still depend on the official map and the building official.","effectiveOn":"2026-01-01T00:00:00.000Z","requirementIds":["iwuic-2021-class-1-2-20-minute-exterior-door","iwuic-2021-class-1-2-class-a-roof-assembly","iwuic-2021-class-1-2-multilayered-glazing","iwuic-2021-class-1-2-noncombustible-deck","iwuic-2021-class-1-2-noncombustible-exterior-door","iwuic-2021-class-1-2-noncombustible-exterior-wall","iwuic-2021-class-1-2-quarter-inch-vent-mesh","iwuic-2021-class-1-2-solid-core-exterior-door","iwuic-2021-class-1-noncombustible-eave","iwuic-2021-class-2-solid-eave-enclosure","iwuic-2021-class-3-class-b-roof-assembly","iwuic-2021-noncombustible-gutters","iwuic-2021-roof-profile-closure","iwuic-2021-roof-valley-flashing"],"requirementCoverage":"partial","requirementCoverageSummary":"Fourteen source-exact 2021 IWUIC product-semantic atoms are normalized from the reviewed Class 1, Class 2, and Class 3 Chapter 5 provisions. This is not full-code normalization; ignition-resistant, fire-retardant-treated-wood, heavy-timber, rated-construction, cap-sheet, debris-control, and approval paths without complete product-field semantics remain outside the set. No 2018 or 2024 requirement is carried in by resemblance.","requirementScopes":[{"requirementId":"iwuic-2021-class-1-2-20-minute-exterior-door","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2"],"scopeSummary":"This rated-door path applies only after official review assigns Class 1 or Class 2 construction.","sourceSections":["504.9","505.9"]},{"requirementId":"iwuic-2021-class-1-2-class-a-roof-assembly","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2"],"scopeSummary":"This Class A roof path applies only after official review assigns Class 1 or Class 2 construction.","sourceSections":["504.2","505.2"]},{"requirementId":"iwuic-2021-class-1-2-multilayered-glazing","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2"],"scopeSummary":"This glazing path applies only after official review assigns Class 1 or Class 2 construction.","sourceSections":["504.8","505.8"]},{"requirementId":"iwuic-2021-class-1-2-noncombustible-deck","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2"],"scopeSummary":"This appendage path applies only after official review assigns Class 1 or Class 2 construction.","sourceSections":["504.7","505.7"]},{"requirementId":"iwuic-2021-class-1-2-noncombustible-exterior-door","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2"],"scopeSummary":"This door-material path applies only after official review assigns Class 1 or Class 2 construction.","sourceSections":["504.9","505.9"]},{"requirementId":"iwuic-2021-class-1-2-noncombustible-exterior-wall","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2"],"scopeSummary":"This wall-material path applies only after official review assigns Class 1 or Class 2 construction.","sourceSections":["504.5","505.5"]},{"requirementId":"iwuic-2021-class-1-2-quarter-inch-vent-mesh","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2"],"scopeSummary":"This prescriptive vent path applies only after official review assigns Class 1 or Class 2 construction.","sourceSections":["504.10","505.10"]},{"requirementId":"iwuic-2021-class-1-2-solid-core-exterior-door","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2"],"scopeSummary":"This door-leaf path applies only after official review assigns Class 1 or Class 2 construction.","sourceSections":["504.9","505.9"]},{"requirementId":"iwuic-2021-class-1-noncombustible-eave","scopeKeys":["ignition-resistant-class-1"],"scopeSummary":"This eave-material path applies only after official review assigns Class 1 construction.","sourceSections":["503.2","504.3"]},{"requirementId":"iwuic-2021-class-2-solid-eave-enclosure","scopeKeys":["ignition-resistant-class-2"],"scopeSummary":"This solid-enclosure path applies only after official review assigns Class 2 construction.","sourceSections":["505.3"]},{"requirementId":"iwuic-2021-class-3-class-b-roof-assembly","scopeKeys":["ignition-resistant-class-3"],"scopeSummary":"This Class B-or-better roof path applies only after official review assigns Class 3 construction.","sourceSections":["506.2"]},{"requirementId":"iwuic-2021-noncombustible-gutters","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2","ignition-resistant-class-3"],"scopeSummary":"This gutter-material path applies after official review assigns Class 1, Class 2, or Class 3 construction.","sourceSections":["504.4","505.4","506.4"]},{"requirementId":"iwuic-2021-roof-profile-closure","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2","ignition-resistant-class-3"],"scopeSummary":"This roof-profile path applies after official review assigns Class 1, Class 2, or Class 3 construction.","sourceSections":["504.2","505.2","506.2"]},{"requirementId":"iwuic-2021-roof-valley-flashing","scopeKeys":["ignition-resistant-class-1","ignition-resistant-class-2","ignition-resistant-class-3"],"scopeSummary":"This valley-flashing path applies after official review assigns Class 1, Class 2, or Class 3 construction.","sourceSections":["504.2.1","505.2.1","506.2.1"]}],"requirementCrosswalk":[{"modelRequirementId":"iwuic-2021-class-1-2-20-minute-exterior-door","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.9","505.9"]},{"modelRequirementId":"iwuic-2021-class-1-2-class-a-roof-assembly","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.2","505.2"]},{"modelRequirementId":"iwuic-2021-class-1-2-multilayered-glazing","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.8","505.8"]},{"modelRequirementId":"iwuic-2021-class-1-2-noncombustible-deck","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.7","505.7"]},{"modelRequirementId":"iwuic-2021-class-1-2-noncombustible-exterior-door","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.9","505.9"]},{"modelRequirementId":"iwuic-2021-class-1-2-noncombustible-exterior-wall","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.5","505.5"]},{"modelRequirementId":"iwuic-2021-class-1-2-quarter-inch-vent-mesh","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.10","505.10"]},{"modelRequirementId":"iwuic-2021-class-1-2-solid-core-exterior-door","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.9","505.9"]},{"modelRequirementId":"iwuic-2021-class-1-noncombustible-eave","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["503.2","504.3"]},{"modelRequirementId":"iwuic-2021-class-2-solid-eave-enclosure","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["505.3"]},{"modelRequirementId":"iwuic-2021-class-3-class-b-roof-assembly","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["506.2"]},{"modelRequirementId":"iwuic-2021-noncombustible-gutters","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.4","505.4","506.4"]},{"modelRequirementId":"iwuic-2021-roof-profile-closure","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.2","505.2","506.2"]},{"modelRequirementId":"iwuic-2021-roof-valley-flashing","disposition":"adopted-unchanged","replacementRequirementIds":[],"scopeSummary":"The State final report records the 2021 IWUIC as adopted without modification.","sourceSections":["504.2.1","505.2.1","506.2.1"]}],"supportingSources":[{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"},{"title":"2021 International Wildland-Urban Interface Code, Chapter 5","url":"https://codes.iccsafe.org/content/IWUIC2021P2/chapter-5-special-building-construction-regulations","publisher":"International Code Council","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}],"unresolvedPredicates":["official-hazard-map","official-hazard-class","project-type","official-confirmation"],"source":{"title":"34 Pa. Code § 403.21 Uniform Construction Code","url":"https://www.pacodeandbulletin.gov/secure/pacode/data/034/chapter403/s403.21.html","publisher":"Pennsylvania Code and Bulletin","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"},"author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-27T00:00:00.000Z"}],"localApplications":[],"requirements":[{"id":"iwuic-2021-class-1-noncombustible-eave","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1 noncombustible eave","url":"/requirements/iwuic-2021-class-1-noncombustible-eave/"},{"id":"iwuic-2021-class-1-2-20-minute-exterior-door","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1–2 20-minute door","url":"/requirements/iwuic-2021-class-1-2-20-minute-exterior-door/"},{"id":"iwuic-2021-class-1-2-class-a-roof-assembly","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1–2 Class A roof","url":"/requirements/iwuic-2021-class-1-2-class-a-roof-assembly/"},{"id":"iwuic-2021-class-1-2-multilayered-glazing","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1–2 multilayered glazing","url":"/requirements/iwuic-2021-class-1-2-multilayered-glazing/"},{"id":"iwuic-2021-class-1-2-noncombustible-deck","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1–2 noncombustible deck","url":"/requirements/iwuic-2021-class-1-2-noncombustible-deck/"},{"id":"iwuic-2021-class-1-2-noncombustible-exterior-door","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1–2 noncombustible door","url":"/requirements/iwuic-2021-class-1-2-noncombustible-exterior-door/"},{"id":"iwuic-2021-class-1-2-noncombustible-exterior-wall","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1–2 noncombustible wall","url":"/requirements/iwuic-2021-class-1-2-noncombustible-exterior-wall/"},{"id":"iwuic-2021-class-1-2-solid-core-exterior-door","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1–2 solid-core door","url":"/requirements/iwuic-2021-class-1-2-solid-core-exterior-door/"},{"id":"iwuic-2021-class-1-2-quarter-inch-vent-mesh","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 1–2 vent mesh","url":"/requirements/iwuic-2021-class-1-2-quarter-inch-vent-mesh/"},{"id":"iwuic-2021-class-2-solid-eave-enclosure","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 2 solid eave enclosure","url":"/requirements/iwuic-2021-class-2-solid-eave-enclosure/"},{"id":"iwuic-2021-class-3-class-b-roof-assembly","instrumentId":"iwuic-2021","shortName":"2021 IWUIC Class 3 Class B roof","url":"/requirements/iwuic-2021-class-3-class-b-roof-assembly/"},{"id":"iwuic-2021-noncombustible-gutters","instrumentId":"iwuic-2021","shortName":"2021 IWUIC noncombustible gutters","url":"/requirements/iwuic-2021-noncombustible-gutters/"},{"id":"iwuic-2021-roof-profile-closure","instrumentId":"iwuic-2021","shortName":"2021 IWUIC roof-profile eave closure","url":"/requirements/iwuic-2021-roof-profile-closure/"},{"id":"iwuic-2021-roof-valley-flashing","instrumentId":"iwuic-2021","shortName":"2021 IWUIC valley flashing","url":"/requirements/iwuic-2021-roof-valley-flashing/"}],"sources":[{"title":"34 Pa. Code § 403.21 Uniform Construction Code","url":"https://www.pacodeandbulletin.gov/secure/pacode/data/034/chapter403/s403.21.html","publisher":"Pennsylvania Code and Bulletin","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"},{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}]},"localAuthorities":[],"claims":{"exact":[{"id":"guide:e119-vs-wui-wall:1","anchor":"local-us-pa-e119-vs-wui-wall-1","place":"Pennsylvania 2021 IWUIC Class 1 and 2 exterior walls","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Pennsylvania incorporates the unmodified 2021 IWUIC effective 1 January 2026. Sections 504.5 and 505.5 include approved noncombustible material as one Class 1 and Class 2 exterior-wall path. That material attribute does not establish a one-hour assembly, wall extent, another alternative, or the complete wall. Official map, assigned class, project, assembly, local amendment, and building-official confirmation remain checks.","asOf":"2026-08-27T00:00:00.000Z","object":{"kind":"guide","id":"e119-vs-wui-wall","title":"ASTM E119 versus a WUI wall test","url":"/guides/e119-vs-wui-wall/"},"source":{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"id":"guide:bird-block-soffit-unvented:1","anchor":"local-us-pa-bird-block-soffit-unvented-1","place":"Pennsylvania 2021 IWUIC Class 1 and 2 eaves","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Pennsylvania incorporates the unmodified 2021 IWUIC effective 1 January 2026. Section 504.3 protects Class 1 eave and soffit undersides with ignition-resistant material; the normalized product path proves only the noncombustible subset. Section 505.3 encloses combustible Class 2 eaves, fascias, and soffits with solid material at least 0.75 inch thick. Sections 504.10 and 505.10 separately prohibit attic vents in soffits and eave overhangs. Official map, assigned class, geometry, full assembly, project, local amendment, and building-official confirmation remain checks.","asOf":"2026-08-27T00:00:00.000Z","object":{"kind":"guide","id":"bird-block-soffit-unvented","title":"Bird blocks, boxed soffit, or unvented attic","url":"/guides/bird-block-soffit-unvented/"},"source":{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"id":"guide:covering-vs-assembly:1","anchor":"local-us-pa-covering-vs-assembly-1","place":"Pennsylvania 2021 IWUIC roof assemblies","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Pennsylvania incorporates the unmodified 2021 IWUIC effective 1 January 2026. Sections 504.2 and 505.2 use a Class A roof assembly tested to ASTM E108 or UL 790 for assigned Class 1 and Class 2 construction; Section 506.2 uses Class B or better for Class 3. Those are tested-assembly paths, not a rating FireApproved assigns to a loose covering. Official map, assigned class, project, complete assembly, local amendment, and building-official confirmation remain checks.","asOf":"2026-08-27T00:00:00.000Z","object":{"kind":"guide","id":"covering-vs-assembly","title":"Covering versus assembly","url":"/guides/covering-vs-assembly/"},"source":{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"id":"guide:dual-pane-vs-tempered:1","anchor":"local-us-pa-dual-pane-vs-tempered-1","place":"Pennsylvania 2021 IWUIC Class 1 and 2 glazing","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Pennsylvania incorporates the unmodified 2021 IWUIC effective 1 January 2026. Sections 504.8 and 505.8 treat tempered glass, multilayered glazed panels, glass block, and 20-minute fire-protection-rated glazing as separate Class 1 and Class 2 alternatives. Unlike California's common CWUIC path, the printed multilayered alternative does not add a tempered-pane conjunction. Official map, assigned class, opening role, project, installation, local amendment, and building-official confirmation remain checks.","asOf":"2026-08-27T00:00:00.000Z","object":{"kind":"guide","id":"dual-pane-vs-tempered","title":"Dual-pane versus tempered windows","url":"/guides/dual-pane-vs-tempered/"},"source":{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"id":"guide:gutters-and-debris:1","anchor":"local-us-pa-gutters-and-debris-1","place":"Pennsylvania 2021 IWUIC gutters and downspouts","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Pennsylvania incorporates the unmodified 2021 IWUIC effective 1 January 2026. Sections 504.4, 505.4, and 506.4 specify noncombustible gutters and downspouts in all three ignition-resistant construction classes. The normalized material atom does not establish a gutter cover or other debris-prevention device. Official map, assigned class, project, installation, local amendment, and building-official confirmation remain checks.","asOf":"2026-08-27T00:00:00.000Z","object":{"kind":"guide","id":"gutters-and-debris","title":"Gutters and debris as an ember bed","url":"/guides/gutters-and-debris/"},"source":{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"id":"guide:how-wui-is-mapped:23","anchor":"local-us-pa-how-wui-is-mapped-23","place":"Pennsylvania 2021 IWUIC adoption","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"34 Pa. Code § 403.21(a)(11) incorporates the 2021 IWUIC into the statewide Uniform Construction Code, effective 1 January 2026. That incorporation does not by itself establish that one parcel is in an official WUI area or which ignition-resistant class applies. This site does not classify the parcel; the map, class, project, and official-confirmation predicates remain open.","asOf":"2026-08-27T00:00:00.000Z","object":{"kind":"guide","id":"how-wui-is-mapped","title":"How the WUI is mapped","url":"/guides/how-wui-is-mapped/"},"source":{"title":"34 Pa. Code § 403.21 Uniform Construction Code","url":"https://www.pacodeandbulletin.gov/secure/pacode/data/034/chapter403/s403.21.html","publisher":"Pennsylvania Code and Bulletin","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"id":"guide:mesh-vs-listed-vents:18","anchor":"local-us-pa-mesh-vs-listed-vents-18","place":"Pennsylvania 2021 IWUIC Class 1 and 2 vent mesh","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"34 Pa. Code § 403.21(a)(11) incorporates the 2021 IWUIC, effective 1 January 2026, and the State's final report says it was adopted without modification. The normalized Sections 504.10 and 505.10 Class 1 and Class 2 path uses noncombustible corrosion-resistant mesh with openings no larger than one-quarter inch. The official map, assigned class, project, 144-square-inch opening limit, prohibited soffit and eave locations, airflow, alternate approval, and building-official confirmation remain separate checks.","asOf":"2026-08-27T00:00:00.000Z","object":{"kind":"guide","id":"mesh-vs-listed-vents","title":"Mesh versus listed vents","url":"/guides/mesh-vs-listed-vents/"},"source":{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"id":"guide:listed-is-voluntary:4","anchor":"local-us-pa-listed-is-voluntary-4","place":"Pennsylvania 2021 IWUIC Class 1 and 2 vent paths","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Pennsylvania incorporates the 2021 IWUIC, and the State's final report says the edition was adopted without modification. Sections 504.10 and 505.10 offer a prescriptive noncombustible corrosion-resistant mesh path no larger than one-quarter inch in Classes 1 and 2 and a separate designed-and-approved flame- or ember-resistant path. The normalized mesh atom does not require a California OSFM listing ID. Official map, class, project, installation, alternate approval, and building-official confirmation remain checks.","asOf":"2026-08-27T00:00:00.000Z","object":{"kind":"guide","id":"listed-is-voluntary","title":"OSFM listing is usually voluntary","url":"/guides/listed-is-voluntary/"},"source":{"title":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"id":"guide:the-state-flower-is-an-ericaceous-fuel:1","anchor":"local-us-pa-the-state-flower-is-an-ericaceous-fuel-1","place":"Pennsylvania DCNR (state flower and wildfire page)","placeId":"us-pa","scopeKind":"place","scopeMode":"descendants","scopeRef":null,"claim":"Mountain laurel was named the state flower in 1933 by Governor Gifford Pinchot. DCNR publishes viewing locations across state forests; peak season May–June. Separate wildfire-prevention page: debris burning is the No. 1 cause of wildfires in Pennsylvania; more than half of ignitions occur in the wildland-urban interface; Immediate Zone (0–5 feet) keep this area free of anything that can burn such as mulch, wood piles, or dry vegetation; Intermediate Zone 5–30 feet; Extended Zone 30–100 feet. More detailed guidance is on the NFPA website. The opened wildfire page does not print a plant table and does not name mountain laurel.","asOf":"2026-08-25T00:00:00.000Z","object":{"kind":"guide","id":"the-state-flower-is-an-ericaceous-fuel","title":"The state flower is an ericaceous fuel","url":"/guides/the-state-flower-is-an-ericaceous-fuel/"},"source":{"title":"Wildfire Prevention and Mitigation","url":"https://www.pa.gov/agencies/dcnr/programs-and-services/community-outreach-and-development/wildfire/wildfire-prevention","publisher":"Pennsylvania Department of Conservation and Natural Resources","sourceType":"official","accessedOn":"2026-08-25T00:00:00.000Z"}},{"id":"guide:wui-door-vs-fire-door:1","anchor":"local-us-pa-wui-door-vs-fire-door-1","place":"Pennsylvania 2021 IWUIC Class 1 and 2 exterior doors","placeId":"us-pa","scopeKind":"place","scopeMode":"exact","scopeRef":null,"claim":"Pennsylvania incorporates the unmodified 2021 IWUIC effective 1 January 2026. Sections 504.9 and 505.9 keep three Class 1 and Class 2 exterior-door alternatives separate—approved noncombustible construction, a solid-core wood leaf at least 1.75 inches thick, or a fire-protection rating of at least 20 minutes. The normalized 20-minute atom does not infer a test method. Official map, assigned class, glazing, frame, installation, project, local amendment, and building-official confirmation remain checks.","asOf":"2026-08-27T00:00:00.000Z","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":"2021 ICC Code Adoption Final Report","url":"https://www.pa.gov/content/dam/copapwp-pagov/en/dli/documents/ucc/documents/2021%20icc%20code%20adoption%20final%20report.pdf","publisher":"Pennsylvania Department of Labor & Industry","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}}],"local":[]},"placeFocusedGuides":[],"findings":[],"plants":{"grain":"state","total":879,"nativeDocumented":0,"invasiveOrNoxiousFlagged":204,"fireResistant":482,"keepAway":136,"conflicts":45,"page":"/grow/pennsylvania/"},"fireEvidencePublicationScope":{"answerGrain":"no-typed-local-source","sourceCount":0}}