On this page

Why it matters
How the objects split
The paths
What people mix up
How to check
Limits
Related records

Home / Guides / How the documents differ / WUI doors versus 20-minute fire doors

WUI doors versus 20-minute fire doors

Last verified 2026-08-27.

A 20-minute fire door is not automatically a wildfire door. OSFM category 8150 is California’s BML bucket for exterior doors in the WUI. Oregon R327.3.6 covers glazed doors and skylights, not a solid swinging leaf. A listing is not a permit.

You are holding a 20-minute tag and an 8150 handbook row. Those tests can share a number and still not be the same job.

The doors category is the catalog. This page is the word swap. Do not use a house-level hub graphic as a door leaf.

Why it matters

Interior fire-door tests look at room-to-room fire. WUI listings look at embers and flame on the exterior assembly. Swapping them specs the wrong hole. Garage weatherstrip is a third object.

How the objects split

Object	What it is	What it is not
20-minute / NFPA 252 fire door	A fire-door test some 8150 rows also cite	Automatic WUI compliance
OSFM 8150	California exterior-door WUI listing	Oregon R327.3.6
R327.3.6	Tempered, multilayered, glass block, or 20-minute glazing	A solid wood leaf path
Garage weatherstrip	Ember gap at the slab	An 8150 SKU

The paths

1. Glazed opening. Use dual-pane versus tempered.

2. Solid leaf in California. Read the 8150 row. Match the model. Listing is usually voluntary.

3. Solid leaf in Oregon. R327.3.6 does not name it. Ask the official. Deschutes may accept a handbook product on the drawings.

4. Garage. Weatherstrip. No extra hole. Not this 8150 catalog.

What people mix up

20-minute as 8150.
8150 as required in Oregon.
A glazed slider as a solid-door listing.

How to check

Is the leaf glazed or solid.
Which program is on the drawing. 8150, a fire-door standard, or R327.3.6.
Confirm the live GOVmotus record if you use 8150.

Limits

This page does not reprint 18 handbook rows. FireApproved is not the AHJ.

Where this differs

Find what applies near you

Enter a ZIP before browsing the complete evidence. Matching, inherited, and place-neutral records will move first; other places and unmapped application rows will fold into expandable groups. Nothing is removed. All 8 cited place claims remain available.

Voluntary programs (1)

IBHS Wildfire Prepared Plus. Plus adds door-leaf rules. Garage doors there may be solid or use a single pane of tempered glass. That is designation language, not 8150.

As of 2026-08-23 · Wildfire Prepared Home Technical Standard (December 2025) — IBHS

California CWUIC mapped fire hazard areas

CWUIC 504.9 keeps noncombustible, thick solid-core wood, NFPA 252/UL 10 20-minute, ASTM E2707, and SFM 12-7A-1 exterior-door paths separate. A current OSFM 8150 listing can document a tested product path, but the code does not make the voluntary catalog the only path. Glazing, frame, hardware, perimeter gaps, installation, map, project, local amendments, and official approval remain checks.

As of 2026-08-27 · 2025 California Wildland-Urban Interface Code construction notes, Section 504.9 — Town of Truckee public record

California OSFM 8150

Category 8150 is Exterior Door for Wildland-Urban Interface. Listing is not a statutory mandate for most WUI products. Confirm the live GOVmotus record and the model.

As of 2026-08-23 · 2025 OSFM WUI Listed Products Handbook (2 September 2025) — CAL FIRE OSFM

Colorado Wildfire Resiliency Code 2025

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.

As of 2026-08-24 · 2025 Colorado Wildfire Resiliency Code — Colorado Division of Fire Prevention and Control

Oregon R327 where adopted

R327.3.6 covers exterior windows, windows within exterior doors, and skylights. Solid swinging entry doors are not that subsection.

As of 2026-08-23 · 2023 ORSC Section R327 amendment — Oregon Building Codes Division

Pennsylvania 2021 IWUIC Class 1 and 2 exterior doors

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.

As of 2026-08-27 · 2021 ICC Code Adoption Final Report — Pennsylvania Department of Labor & Industry

Salt Lake City 2006 UWUI exterior doors

Current Salt Lake City Code 18.44.010.B applies the Utah Wildland Urban Interface Code on property shown on the City WUI map. In the 2006 book, Sections 504.9 and 505.9 give IR1 and IR2 exterior doors three separate paths—approved noncombustible construction, a solid-core wood leaf at least 1.75 inches thick, or a fire-protection rating of at least 20 minutes—and except vehicle access doors. Glazing follows Sections 504.8 and 505.8. Map inclusion, assigned class, project, and official approval remain separate checks.

As of 2026-08-27 · Salt Lake City Code 18.44.010 International Fire Code and Standards Adopted — Salt Lake City / American Legal Publishing

Taylorsville 2006 UWUI exterior doors

Ordinance 25-15 adopts the Utah Wildland Urban Interface Code with FFSL-approved alternatives or amendments on the attached map. In the 2006 book, Sections 504.9 and 505.9 give IR1 and IR2 exterior doors three separate paths—approved noncombustible construction, a solid-core wood leaf at least 1.75 inches thick, or a fire-protection rating of at least 20 minutes—and except vehicle access doors. Glazing follows Sections 504.8 and 505.8. Map status, assigned class, project, and official approval remain separate checks.

As of 2026-08-27 · Taylorsville Ordinance 25-15 Utah Wildland Urban Interface Code — City of Taylorsville

Questions

Is a 20-minute fire door a WUI door?

Not by itself. Some 8150 listings cite NFPA 252 or a 20-minute rating. That is a fire-door test. WUI 8150 rows can also address ember and flame exposure of the exterior assembly. Read the listing. Do not swap the two.

Does Oregon R327 list solid entry doors?

R327.3.6 names exterior windows, windows within exterior doors, and skylights. Glazed doors share that menu. A solid swinging leaf is not that subsection. Confirm the adopted code with the official.

Do I need 8150 in Oregon?

Listing is usually voluntary. Deschutes accepts handbook products when they are shown on the drawings. Absence from 8150 is not an automatic ban.

Sources

2025 California Wildland-Urban Interface Code construction notes, Section 504.9 — Town of Truckee public record (official). Accessed 2026-08-27.
2006 Utah Wildland-Urban Interface Code — International Code Council (hosted by Sanpete County) (official). Accessed 2026-08-27.
Salt Lake City Code 18.44.010 International Fire Code and Standards Adopted — Salt Lake City / American Legal Publishing (official). Accessed 2026-08-27.
Taylorsville Ordinance 25-15 Utah Wildland Urban Interface Code — City of Taylorsville (official). Accessed 2026-08-27.
2023 ORSC Section R327 amendment — Oregon Building Codes Division (official). Accessed 2026-08-23.
2025 OSFM WUI Listed Products Handbook (2 September 2025) — CAL FIRE OSFM (listing-body). Accessed 2026-08-23.
Wildfire Prepared Home Technical Standard (December 2025) — IBHS (standard-body). Accessed 2026-08-23.