United States / Build / Thermally Modified Ash Siding Panels, tongue and groove siding sized nominally 0

Thermally Modified Ash Siding Panels, tongue and groove siding sized nominally 0: type figure, drawn from this record's sourced dimensions. No dimension is drawn that its source did not publish.
Thermally Modified Ash Siding Panels, tongue and groove siding sized nominally 0 — type figure. Drawn from this record's own sourced values; every dimension on it is one a published document states, and a parameter the source did not publish is named on the drawing rather than estimated. CC BY 4.0.

Thermally Modified Ash Siding Panels, tongue and groove siding sized nominally 0

This is a listed siding assembly. Listing 8140-2392:0002. This site cites SFM 12-7A-1. Match the model and orientation.

Kind: listed-assembly. Brand: Arbor Wood Co.. Listing evidence: OSFM WUI handbook 2026-08-25. Page reviewed 2026-08-23. JSON (CC BY 4.0)

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Arbor Wood's thermally modified ash tongue-and-groove siding is listed as part of a wall assembly with specified framing, sheathing and wrap.

The ash siding in OSFM listing 8140-2392:0002 is nominally 0.75 inch thick and five inches wide. Behind it, the listed wall uses two-by-four Douglas Fir framing spaced sixteen inches on center, 7/16-inch oriented strand board and Tyvek WRB. Those backing materials are part of the description alongside the siding profile.

The handbook identifies SFM 12-7A-1 as the test protocol. For a homeowner comparing siding, that ties the listing to the described exterior-wall assembly. Matching the tongue-and-groove face alone does not establish that a proposed wall has the same framing, sheathing and wrap.

Bring the full combination into the siding specification: the named ash model, its nominal dimensions and the wall behind it. Arbor Wood's product data sheets and installation instructions are the references named by the source. Verify the live BML listing for the exact product before purchase and keep the specified wall construction with the panel selection.

Documented attributes

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

AttributeValueEvidence source
Fire
Test standard sfm 12 7a 1 OSFM Building Materials Listing — 8140-2392:0002 (official-listing · Listing 8140-2392:0002, TEST PROTOCOL)TEST PROTOCOL: SFM 12-7A-1

Published requirement matches

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

ProgramID / sourceEvidence dateExpiresStatus
CAL FIRE BML 8140-2392:0002 · Search BML for 8140-2392:0002 2026-08-25 2027-06-30 listed

Tests and programs cited

Models named on the listing

ModelApplication
Thermally Modified Ash Siding Panels

Specification notes

Sources

Thermally Modified Ash Siding Panels, tongue and groove siding sized nominally 0. FireApproved. https://fireapproved.com/materials/arbor-wood-co-thermally-modified-ash-siding-panels-tongue-and-groove/. Last verified 2026-08-23.