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, California, 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.

Shakertown has been developing reinforced cedar products since 1954, introducing the shingle panel in the same year. Shakertown launched the Dolly Varden T&G product in 2015 after four years of research and development.