3300
Explore documented surface-burning performance for applications that do not require FRTW. A Class A result alone is not FRTW qualification.
See 3300 ↗See its warranty options ↗
Fire protection
Choose by the specification.
Surface-burning performance and fire-retardant-treated wood are not interchangeable. Start with what the project requires.
See matching treatments ↓
Framing photograph with treatment-color visualization. Not a fire test or a guarantee of building performance.
3300 or 4400? The requirement decides.
3300 offers documented surface-burning performance when the specification does not require FRTW. 4400 is the system to evaluate for documented fire-retardant-treated wood applications, subject to the listed substrate, assembly and project approval.
- Confirm whether the plans require FRTW, a surface-burning classification or a rated assembly.
- Match species, grade, dimensions and installation to current documentation.
- Check exposure, finishing and design-value requirements before purchase.
What supports the protection?
ASTM E84 evaluates surface-burning behavior. The extended evaluation used for documented FRTW applications is a different qualification from a standard Class A result. A wall’s fire-resistance rating belongs to the complete listed assembly, not an individual stud.
What are the limits?
Neither treatment makes wood noncombustible or fireproof. The ChemTech limited warranty says CTH treated products are not warranted in any way against destruction from fire. The TW4400 term is a specified ASTM E84 Class A flame-spread rating for listed dimensional species, for up to 20 years.
How do warranties fit in?
Coverage depends on the selected treatment, eligible wood, project records and complete written terms. A warranty is a defined remedy, not a promise that damage can never happen.
Choose your system
Two systems. Different requirements.
4400
Start here when the plans require fire-retardant-treated wood. Confirm the listed wood, exposure, design and approval requirements.
See 4400 ↗See its warranty options ↗REZWOOD™Treated by Texas Wood Tech.
Treatment protects the treated wood itself—not occupants’ health. Product documentation and complete written warranty terms apply.
