United States / Build / Longboard® 6-inch exterior aluminum siding

Longboard® 6-inch exterior aluminum siding

Name: Longboard® 6-inch exterior aluminum siding
Brand: Longboard Architectural Products Inc.

This is a listed siding assembly. Listing 8140-2430:0001. This site cites ASTM E84. Match the model and orientation.

Longboard documents its lap siding as a 6-inch extruded-aluminum system and identifies ASTM E136 noncombustibility and ASTM E84 surface-burning evaluation. CAL FIRE OSFM listing 8140-2430:0001 covers 0.06-inch-thick panels in 12- and 24-foot lengths installed horizontally over Tyvek, 1/2-inch gypsum wallboard, 7/16-inch OSB, and studs at 16 inches on centre. ICC-ES ESR-4182 separately evaluates Longboard siding as exterior veneer and unvented eave soffit.

Kind: listed-assembly. Brand: Longboard Architectural Products Inc.. Listing evidence: OSFM WUI handbook 2026-08-25. Page reviewed 2026-08-25. JSON (CC BY 4.0)

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Documents for this product

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Spec sheets

Longboard® Tongue & Groove Planks — Materials Estimate Guide — Longboard Architectural Products Inc. · PDF
Found at longboardproducts.com/wp-content/ off the siding product page. It names the plank family — Tongue & Groove Planks — and lists the 4" and 6" plank in 12' and 24' boxes, which are the widths and lengths the OSFM listing names. Its coverage figures are in SQUARE FEET PER BOX, so no linear exposure is published anywhere in it.

Documented attributes

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

Attribute	Value	Evidence source
Dimensions
Width	6 in	Longboard 6-inch Lap Siding product page (manufacturer)
Material
Material	aluminum	Longboard 6-inch Lap Siding product page (manufacturer)
Fire
Noncombustible	Yes	Longboard 6-inch Lap Siding product page (manufacturer)

Published requirement matches

These links are generated from the cited attributes above. They do not decide installation or a project result.

Colorado CWRC noncombustible wall · Colorado jurisdictions adopting CWRC in moderate or high mapped wildfire hazard areas
California noncombustible wall · California mapped fire hazard areas
2018 IWUIC Class 1–2 noncombustible wall · Jurisdictions adopting unamended 2018 IWUIC Chapter 5
2021 IWUIC Class 1–2 noncombustible wall · Jurisdictions adopting unamended 2021 IWUIC Chapter 5
IWUIC Class 1–2 noncombustible wall · Jurisdictions adopting unamended 2024 IWUIC Chapter 5
Kittitas IR1 noncombustible wall · Unincorporated Kittitas County IR1 construction
ORSC R327 noncombustible wall · Oregon local jurisdictions that adopted ORSC R327
2006 Utah UWUI Class 1–2 noncombustible wall · Utah local compliance agencies adopting the 2006 Utah Wildland-Urban Interface Code

Program	ID / source	Evidence date	Expires	Status
CAL FIRE BML	8140-2430:0001 · Search BML for 8140-2430:0001	2026-08-25	2027-06-30	listed

Tests and programs cited

ASTM E84 · test-method
ASTM E136 · test-method
OSFM BML · listing-program
ICC-ES · listing-program

Models named on the listing

Model	Application
Longboard 6-inch exterior aluminum siding — 12-foot plank	horizontal exterior wall cladding in the OSFM-listed assembly
Longboard 6-inch exterior aluminum siding — 24-foot plank	horizontal exterior wall cladding in the OSFM-listed assembly

Specification notes

OSFM listing 8140-2430:0001 and ICC-ES ESR-4182 have distinct assembly scopes. The BML WUI assembly names 7/16-inch OSB plus exterior gypsum; ESR-4182 requires a solid substrate and at least 5/8-inch plywood when that substrate is wood sheathing. Follow the conditions governing the proposed assembly and do not combine the least restrictive details from each document.

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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 wall matched
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Yes	matched

IWUIC Class 1–2 noncombustible wall matched
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Yes	matched

IWUIC Class 1 wall-base protection undocumented
Field	Required	Documented value	State
Assembly role	Assembly role = wall base protection	Not documented	undocumented
Height	Height ≥ 6 in	Not documented	undocumented
Noncombustible	Noncombustible = Yes	Yes	matched

California noncombustible wall matched
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Yes	matched

California one-hour exterior wall undocumented
Field	Required	Documented value	State
Fire resistance	Fire resistance ≥ 60 min	Not documented	undocumented

California SFM 12-7A-1 wall undocumented
Field	Required	Documented value	State
Test standard	Test standard = sfm 12 7a 1	Not documented	undocumented

Colorado CWRC noncombustible wall matched
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Yes	matched

Colorado CWRC wall-base protection undocumented
Field	Required	Documented value	State
Assembly role	Assembly role = wall base protection	Not documented	undocumented
Height	Height ≥ 6 in	Not documented	undocumented
Noncombustible	Noncombustible = Yes	Yes	matched

2018 IWUIC Class 1–2 noncombustible wall matched
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Yes	matched

Kittitas IR1 noncombustible wall matched
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Yes	matched

Kittitas IR1 one-hour wall undocumented
Field	Required	Documented value	State
Fire resistance	Fire resistance ≥ 60 min	Not documented	undocumented

Kittitas Table 503.1 N.C. wall undocumented
Field	Required	Documented value	State
Fire resistance	Fire resistance ≥ 60 min	Not documented	undocumented
Noncombustible	Noncombustible = Yes	Yes	matched

2021 IWUIC Class 1–2 noncombustible wall matched
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Yes	matched

2006 Utah UWUI Class 1–2 noncombustible wall matched
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Yes	matched

2006 Utah UWUI Class 1–2 one-hour wall undocumented
Field	Required	Documented value	State
Fire resistance	Fire resistance ≥ 60 min	Not documented	undocumented

2006 Utah UWUI Table 503.1 N.C. wall undocumented
Field	Required	Documented value	State
Fire resistance	Fire resistance ≥ 60 min	Not documented	undocumented
Noncombustible	Noncombustible = Yes	Yes	matched

Sources

OSFM Building Materials Listing (live database) — CAL FIRE OSFM (listing-body). Accessed 2026-08-23.
ICC-ES ESR-4182 evaluation report — ICC Evaluation Service (official). Accessed 2026-08-25.
Longboard 6-inch Lap Siding product page — Longboard Architectural Products Inc. (manufacturer). Accessed 2026-08-25.
Longboard Lap Siding installation guide — Longboard Architectural Products Inc. (manufacturer). Accessed 2026-08-25.

Longboard® 6-inch exterior aluminum siding. FireApproved. https://fireapproved.com/materials/longboard-architectural-products-inc-model-longboard-exterior-aluminum/. Last verified 2026-08-25.