Home / Materials / LP® SmartSide® 38 Series Strand Substrate lap siding WUI assembly

LP® SmartSide® 38 Series Strand Substrate lap siding WUI assembly

Name: LP® SmartSide® 38 Series Strand Substrate lap siding WUI assembly
Brand: Louisiana-Pacific Corporation

This is a listed siding assembly. Listing 8140-2027:0001. This site cites cal-fire-bml. Match the model and orientation. A listing is not a permit.

LP documents SmartSide as treated engineered-wood siding and its current lap-siding instructions identify CAL FIRE BML 8140-2027:0001 as the Chapter 7A path using 1/2-inch standard gypsum wallboard behind the lap siding. ICC-ES ESR-1301 separately evaluates SmartSide and ExpertFinish treated-engineered-wood siding for code compliance and installation conditions.

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)

Documented attributes

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

Attribute	Value	Evidence source
Material	wood	LP SmartSide engineered-wood lap siding (manufacturer)

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

Tests and programs cited

OSFM BML · listing-program
ICC-ES · listing-program

Models named on the listing

Model	Application
LP SmartSide 38 Series Strand Substrate lap siding	exterior lap siding over 1/2-inch standard gypsum wallboard in the listed WUI assembly

Match the 38 Series Strand Substrate product, 1/2-inch exterior gypsum wallboard, water-resistive barrier, fasteners, overlap, joints, clearances, finish, and maintenance to OSFM listing 8140-2027:0001 and current LP instructions. ESR-1301 is evaluation evidence, not a second listing or a substitute for the WUI assembly.
OSFM listing is not a permit. The authority having jurisdiction decides.

Can I use this here

This trace joins product evidence to a sourced code application, then keeps every boundary, map, date, project check, documented constraint match, and still-undocumented field visible. It is not a permit result. Full explorer: Can I use this here.

Set a location for the local trace

Without a place, no local application is inferred. The collapsed jurisdiction index below keeps every sourced static trace available.

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The rule and every matching product for the United States

Requirement constraints (16)

Each table below compares this product's documented attributes against one published requirement. That comparison is a fact about the product and the requirement, and does not change from place to place, so it is printed once.

Requirement constraints (16)

Each table compares this product's documented attributes with one published requirement. That comparison does not change from place to place, so it is printed once here and linked from every jurisdiction below.

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

IWUIC Class 1–2 noncombustible wall undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

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	Not documented	undocumented

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

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 undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

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	Not documented	undocumented

2018 IWUIC Class 1–2 noncombustible wall undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

Kittitas IR1 noncombustible wall undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

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	Not documented	undocumented

2021 IWUIC Class 1–2 noncombustible wall undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2006 Utah UWUI Class 1–2 noncombustible wall undocumented
Field	Required	Documented value	State
Noncombustible	Noncombustible = Yes	Not documented	undocumented

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	Not documented	undocumented

Where this applies

A product is a national record; where it applies is a fact about a place. The rule that binds a given address — and every product matching it — is published on that place's own answer page, linked above and re-linked by the location lens. The complete per-place claim graph for this record, including every open official check, is in its JSON twin.

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.
ICC-ES ESR-1301 evaluation report — ICC Evaluation Service (official). Accessed 2026-08-25.
LP SmartSide Lap Siding application instructions — Louisiana-Pacific Corporation (manufacturer). Accessed 2026-08-25.
LP SmartSide engineered-wood lap siding — Louisiana-Pacific Corporation (manufacturer). Accessed 2026-08-25.

LP® SmartSide® 38 Series Strand Substrate lap siding WUI assembly. FireApproved. https://fireapproved.com/materials/louisiana-pacific-corporation/. Last verified 2026-08-25.