United States / Build / LP® FlameBlock® 15/32 sheathing eave assembly

LP® FlameBlock® 15/32 sheathing eave assembly

Name: LP® FlameBlock® 15/32 sheathing eave assembly
Brand: Louisiana-Pacific Corporation

This is a listed eave assembly. Listing 8160-2027:0007. This site cites OSFM BML. Match the model and orientation.

LP documents FlameBlock as fire-rated oriented-strand-board sheathing and publishes a 15/32 performance category. CAL FIRE OSFM listing 8160-2027:0007 covers a 4-by-8-foot FlameBlock panel with Pyrotile on one face, a 1/8-inch gap at the joist nailer, and nominal 5/8-inch-or-thicker by 4-inch-or-wider cedar or redwood V-ceiling cladding.

Kind: listed-assembly. Brand: Louisiana-Pacific Corporation. Listing evidence: OSFM WUI handbook 2026-08-25. Page reviewed 2026-08-25. JSON (CC BY 4.0)

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Documented attributes

Each value below points to its field-level manufacturer, official-listing, test-report, or standard-body evidence.

Attribute	Value	Evidence source
Form
Solid surface	Yes	LP FlameBlock installation instructions (manufacturer)
Dimensions
Thickness	0.46875 in	LP FlameBlock installation instructions (manufacturer)
Material
Material	wood	LP FlameBlock installation instructions (manufacturer)

Program	ID / source	Evidence date	Expires	Status
CAL FIRE BML	8160-2027:0007 · Search BML for 8160-2027:0007	2026-08-25	2027-06-30	listed

Tests and programs cited

OSFM BML · listing-program

Models named on the listing

Model	Application
LP FlameBlock 15/32 Performance Category, coated one side	sheathing layer in the listed eave assembly

Specification notes

The listing covers a complete layered assembly, not the FlameBlock panel alone. Match the panel category, coated face, Pyrotile, gaps, joists, cladding species and dimensions, fasteners, and installation details to OSFM listing 8160-2027:0007.

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Requirement constraints (16)

Each table compares this product's documented attributes with one published requirement. The comparison does not change from place to place, so it is printed once.

ORSC R327 noncombustible underside undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

Austin Zone A noncombustible eave undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

Austin Zones B–C noncombustible eave undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

Austin Zones B–C solid eave enclosure not matched
Field	Required	Documented value	State
Solid surface	Solid surface = Yes	Yes	matched
Thickness	Thickness ≥ 0.75 in	0.46875 in	not matched

California noncombustible eave undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

California SFM 12-7A-3 underside undocumented
Field	Required	Documented value	State
Test standard	Test standard = sfm 12 7a 3	Not documented	undocumented

IWUIC Class 1 noncombustible eave undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

IWUIC Class 2 solid eave enclosure not matched
Field	Required	Documented value	State
Solid surface	Solid surface = Yes	Yes	matched
Thickness	Thickness ≥ 0.75 in	0.46875 in	not matched

Colorado CWRC noncombustible eave undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2018 IWUIC Class 1 noncombustible eave undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2018 IWUIC Class 2 solid eave enclosure not matched
Field	Required	Documented value	State
Solid surface	Solid surface = Yes	Yes	matched
Thickness	Thickness ≥ 0.75 in	0.46875 in	not matched

2021 IWUIC Class 1 noncombustible eave undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2021 IWUIC Class 2 solid eave enclosure not matched
Field	Required	Documented value	State
Solid surface	Solid surface = Yes	Yes	matched
Thickness	Thickness ≥ 0.75 in	0.46875 in	not matched

Prescott Class 3 one-hour eave undocumented
Field	Required	Documented value	State
Fire resistance	Fire resistance ≥ 60 min	Not documented	undocumented

2006 Utah UWUI Class 1 one-hour eave undocumented
Field	Required	Documented value	State
Fire resistance	Fire resistance ≥ 60 min	Not documented	undocumented

2006 Utah UWUI Class 2 solid eave enclosure not matched
Field	Required	Documented value	State
Solid surface	Solid surface = Yes	Yes	matched
Thickness	Thickness ≥ 0.75 in	0.46875 in	not matched

Sources

2025 OSFM WUI Listed Products Handbook (2 September 2025) — CAL FIRE OSFM (official). Accessed 2026-08-23.
OSFM Building Materials Listing search — CAL FIRE OSFM (listing-body). Accessed 2026-08-23.
LP FlameBlock installation instructions — Louisiana-Pacific Corporation (manufacturer). Accessed 2026-08-25.

LP® FlameBlock® 15/32 sheathing eave assembly. FireApproved. https://fireapproved.com/materials/louisiana-pacific-corporation-8160-2027-0007/. Last verified 2026-08-25.