United States / Build / FTX, Thermex, and FSR pressure-treated western red cedar roofing

FTX, Thermex, and FSR pressure-treated western red cedar roofing

Name: FTX, Thermex, and FSR pressure-treated western red cedar roofing
Brand: FSR Treatment, Inc.

This is a listed roofing assembly. Listing 4150-1735:0101. This site cites ASTM E108 / UL 790. Match the model and orientation.

CAL FIRE OSFM listing 4150-1735:0101 names FTX, Thermex, and FSR pressure-treated No. 1 western red cedar shakes or shingles. QAI CERus-1032 evaluates the FTX and FSR treatment lines in ASTM E108 Class A, B, and C roof assemblies after weathering; the current QAI report does not name Thermex, so no QAI performance claim is extended to that model here.

Kind: listed-assembly. Brand: FSR Treatment, Inc.. 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
Assembly role	roof covering	Fire Smart Roofing treatment options (manufacturer)
Material
Material	wood	Fire Smart Roofing treatment options (manufacturer)
Fire
Test standard	astm e108	Fire Smart Roofing certifications and test standards (manufacturer)

Where this product goes

FA Exhibit ROF-100. The roof system, named

Program	ID / source	Evidence date	Expires	Status
CAL FIRE BML	4150-1735:0101 · Search BML for 4150-1735:0101	2026-08-25	2027-06-30	listed

Tests and programs cited

ASTM E108 / UL 790 · test-method
OSFM BML · listing-program

Models named on the listing

Model	Application
FTX Class B or Class C treated shakes and shingles
FSR Class B or Class C treated shakes and shingles
Thermex treated shakes and shingles	Named by OSFM listing 4150-1735:0101; not named in current QAI CERus-1032

Specification notes

QAI CERus-1032 names FTX and FSR, not Thermex. Do not apply the QAI classifications or assembly details to a Thermex-labeled bundle without the current product-specific evaluation and listing data sheet.
Class A applies only to the complete QAI assembly using Class B treated FTX or FSR shakes or shingles with the specified noncombustible covering or ASTM D3909 cap sheet. Match the treatment, deck, underlayment, starter course, fasteners, and every installation condition.
QAI CERus-1032 requires removal of existing roof coverings for reroofing and limits treated cedar species, sheathing, underlayment, and fasteners as stated in the report.

Can I use this here

Local force

The rule and every matching product for the United States

Requirement constraints (5)

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.

Kittitas high/extreme Class A roof covering undocumented
Field	Required	Documented value	State
Assembly role	Assembly role = roof covering	roof covering	matched
Fire rating	Fire rating = class a	Not documented	undocumented

Kittitas low/general Class C roof floor undocumented
Field	Required	Documented value	State
Assembly role	Assembly role = roof covering	roof covering	matched
Fire rating	Fire rating is one of class a, class b, class c	Not documented	undocumented

Kittitas moderate Class B roof floor undocumented
Field	Required	Documented value	State
Assembly role	Assembly role = roof covering	roof covering	matched
Fire rating	Fire rating is one of class a, class b	Not documented	undocumented

2006 Utah UWUI noncombustible roof covering undocumented
Field	Required	Documented value	State
Assembly role	Assembly role = roof covering	roof covering	matched
Noncombustible	Noncombustible = Yes	Not documented	undocumented

2006 Utah UWUI Class A roof covering undocumented
Field	Required	Documented value	State
Assembly role	Assembly role = roof covering	roof covering	matched
Fire rating	Fire rating = class a	Not documented	undocumented

Sources

OSFM Building Materials Listing (live database) — CAL FIRE OSFM (listing-body). Accessed 2026-08-25.
QAI CERus-1032 — FTX and FSR fire-retardant-treated shingles and shakes — QAI Laboratories (official). Accessed 2026-08-25.
FSR pressure-impregnation treatment process — Fire Smart Roofing / FSR Treatment, Inc. (manufacturer). Accessed 2026-08-25.
Fire Smart Roofing treatment options — Fire Smart Roofing / FSR Treatment, Inc. (manufacturer). Accessed 2026-08-25.
Fire Smart Roofing certifications and test standards — Fire Smart Roofing / FSR Treatment, Inc. (manufacturer). Accessed 2026-08-25.

FTX, Thermex, and FSR pressure-treated western red cedar roofing. FireApproved. https://fireapproved.com/materials/fsr-treatment-inc-model-ftx-and-thermex-and-fsr-pressure-treated-no-1/. Last verified 2026-08-25.