Shakertown’s Dolly Varden T&g Passes Flame-Spread Testing

Shakertown’s reinforced Dolly Varden T&G, with its clear vertical grain cedar face, passed ASTM E84 testing with a Class A flame spread rating.

This designation allows the installation of a natural wood surface in interior applications where a Class A rating is required. The testing was conducted at QAI Laboratories in Rancho Cucamonga, Ca., using the industry standard Steiner Tunnel test method.

The Dolly Varden T&G with a western red cedar face completed the test with a Flame Spread Index (FSI) of 25 and a Smoke Development Index (SDI) of only 80, earning the building product its Class A designation.

Winlock, Wa.-based Shakertown launched the Dolly Varden T&G product in 2015 after four years of research and development. The tongue-and-groove cedar panel system delivers a stronger, more durable engineered paneling. It also holds Wildland-Urban-Interface (WUI) listings with CalFire for use on exterior walls, and is approved for use in CalFire High Fire Severity Zones when installed direct to soffit joists.

“Shakertown is committed to making better wood building materials, not cheaper,” said Mark Rutledge, VP of sales & marketing. “Our focus always has been—and continues to be—providing naturally beautiful and safer building materials that last for decades. This is what makes Shakertown an outlier in the building industry.”

The Dolly Varden T&G is available in a nominal 6” and 4” width, with a Micro-V and FineLine (Nickel Gap) profile. The exclusive patent-pending core eliminates checks, splits, cups, twists and bows.


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