Home / Materials / ROCKWOOL Comfortboard 80 exterior continuous insulation
ROCKWOOL Comfortboard 80 exterior continuous insulation This is a listed siding assembly. Listing 2440-2270:0500. This site cites astm-e84. Match the model and orientation. A listing is not a permit.
Listed · multiple independent channels. Active CAL FIRE BML listing 2440-2270:0500, expires 2027-06-30 (verified against the live BML 2026-08-25). Multiple independent channels agree; each is shown below.
▲ CAL FIRE BML 2440-2270:0500 · active ▲ documented attributes match 8 requirements
Status derived from the cited listings by a published rule, never hand-assigned. Each chip
above is one evidence channel and its direction. A listing is not a permit — the authority
having jurisdiction decides.
CAL FIRE OSFM listing 2440-2270:0500 covers ROCKWOOL Comfortboard 80 rigid stone-wool non-structural sheathing for exterior walls in 1.25-, 1.5-, 2-, 2.5-, and 3-inch thicknesses. ROCKWOOL's current technical data identifies ASTM E84 flame-spread and smoke-developed indices of zero and ASTM E136 noncombustibility.
Kind: listed-assembly.
Brand: ROCKWOOL . 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.
Published requirement matches These links are generated from the cited attributes above. They do not decide installation or a project result.
Models named on the listing Model Application Comfortboard 80 BML-listed thicknesses: 1.25, 1.5, 2, 2.5, and 3 inches
Category 2440 is a general insulation listing, not an OSFM WUI exterior-wall listing. Confirm whether the authority accepts it for the proposed WUI assembly. Noncombustible insulation does not by itself establish that the complete wall assembly meets a fire-resistance, exterior-surface, or ignition-resistance requirement. 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.
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In this place , this meets the model code 2018 IWUIC Class 1–2 noncombustible wall rule.
In this place , this meets the adopted IWUIC Class 1–2 noncombustible wall rule.
In this place , this meets the adopted California noncombustible wall rule.
In this place , this meets the available for local adoption Colorado CWRC noncombustible wall rule.
In this place , this meets the adopted 2018 IWUIC Class 1–2 noncombustible wall rule.
In this place , this meets the available for local adoption ORSC R327 noncombustible wall rule.
In this place , this meets the adopted ORSC R327 noncombustible wall rule.
In this place , this meets the adopted 2021 IWUIC Class 1–2 noncombustible wall rule.
In this place , this meets the adopted 2006 Utah UWUI Class 1–2 noncombustible wall rule.
In this place , this meets the adopted Kittitas IR1 noncombustible wall rule.
The rule and every matching product for the United States
Save to my house How this product meets each requirement (16)
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.
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 SFM 12-7A-1 wall undocumented Field Required Documented value State Test standard Test standard = sfm 12 7a 1 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 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
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
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
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JSON twin .
ROCKWOOL Comfortboard 80 exterior continuous insulation. FireApproved. https://fireapproved.com/materials/rockwool-comfortboard-80-exterior-continuous-insulation/. Last verified 2026-08-25. Verify at the source. Every listing number and claim here links to its origin — listings change and local amendments govern, so check the current record before you specify.