Natural, Beautiful, Resilient

Fire Resistant Wood
Collection

Fire-resistant (FR) exterior wood products for permanent protection and wildfire code compliance. Available from Wood Source in Denver, Colorado.

Wood Source FR Siding

Finished fire-resistant exterior wood siding products available from Wood Source.
Contact us for product samples and project inquiries.
Request Samples
CWRC Logo

The Challenge:
Wildfire-Resilient Design

With growing wildfire risk across the United States, building practices in the wildland-urban interface (WUI) continue to evolve. Regulations like the Colorado Wildfire Resiliency Code (CWRC) are reshaping how exterior materials are specified in wildfire-prone areas.

Builders and design professionals need exterior materials that meet code requirements without sacrificing aesthetic appeal.
About the CWRC

Our Solution: FRTW

Wood Source FR products are fire-retardant-treated-wood (FRTW). FRTW is real wood pressure treated for fire resistance to meet wildfire code requirements for exterior use.

FRTW Benefits

Wildfire Code Compliance

FRTW complies with CWRC Class 2 structure hardening requirements for soffits, exterior siding, and decking.

non-toxic FORMULA

Our preferred FRTW solution is a low-toxicity salt-based formula with independent third-party evaluations.

Limited Lifetime Warranty

FRTW undergoes a one-time pressure treatment process for lasting fire resistance and peace of mind.
Wood Source 25 year anniversary logo

Why Wood Source?

25+ Years of Experience

With over 25 years in business, we are the experts on fire treated wood products, mountain construction, and Colorado wildfire codes.

Finished FRTW Products

Wood Source offers beautiful prefinished FRTW products that meet wildfire code requirements with consistent color and finish quality.

Local Colorado Supplier

We stock fire-resistant wood products at our Denver facility and deliver directly to jobsites across Colorado and the Rocky Mountain region.

About Us

Frequently Asked Questions

Yes, Wood Source FR products are FRTW and meet CWRC Class 2 structure hardening requirements for soffits, exterior wall coverings, and decking.
Yes, all Wood Source FR products meet Class A flame spread per the ASTM E2768 30-minute surface burning test.
We stock FR products at our yard in Denver, Colorado. We deliver directly to jobsites throughout the Rocky Mountain Region. Contact us to inquire about product pricing and lead times.
Every wood species reacts differently to fire treatment. Some fire treated products may develop a slightly yellow color. We recommend adding color finish after fire treatment to achieve a desired look. We offer FRTW products with and without color prefinishing.
Yes, Wood Source supplies both unfinished and prefinished FR products. Contact us to learn more about unfinished FRTW.
No. Our preferred FRTW treatment is a low-toxicity salt-based chemical formula with independent third-party evaluations. Wood Source FR products are safe to humans and the environment.

Ready to get started?

Our team is here to answer your questions. We can help you find the right products for your project.
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