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UFP-Edge Achieves WUI Compliance for Thermally Modified VG Hemlock Siding

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Grand Rapids, Mich., July 1, 2024—

UFP-Edge is proud to announce that our Thermally Modified VG Hemlock has been officially approved for use in Wildland-Urban Interface (WUI) areas. The California Office of the State Fire Marshal (OSFM) has issued Building Materials listing 8140-2392:0001, demonstrating compliance with SFM Standard 12-7A-1 for exterior wall siding. This milestone achievement marks a significant advancement in our commitment to providing high-quality building materials for areas prone to wildfire risk.

WUI compliance ensures that UFP-Edge Thermally Modified VG Hemlock, 1x6 and 1x8 T&G nickel gap patterns, has undergone rigorous testing standards. To pass, the product showed no flame penetration through the wall assembly and no glowing combustion on the interior. Offering WUI-compliant materials enables us to provide our products in fire-sensitive regions where WUI compliance is essential for specifications.

“Achieving WUI compliance is a testament to our dedication to innovation and safety,” said Chris Hayn, Vice President for UFP-Edge. “Thermally Modified VG Hemlock offers exceptional beauty and performance and can now be utilized in WUI-specified areas.”

Key Features of UFP-Edge Thermally Modified VG Hemlock:

Thermal Modification: A specialized heat treatment process enhances the wood’s stability, making it more resistant to warping, shrinking, rot and decay.

WUI Compliant: Passes required testing for use in WUI areas.

Aesthetic Appeal: Vertical Grain (VG) Hemlock provides a uniform, clean appearance, perfect for a variety of exterior and interior applications.

Durability: Increased resistance to rot and decay, covered by a 20-yr limited warranty (rot/decay).

UFP-Edge Thermally Modified VG Hemlock is now available to builders, contractors, architects, and designers seeking building materials needing WUI compliance for specification. This product is ideal for exterior or interior use where both beauty and safety are paramount.

For more information about UFP-Edge Thermally Modified VG Hemlock and other innovative building products, visit

Download the official press release here.

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