What is "biobased?" The question seems to be drawing some confusion lately, especially in light of proposed credit changes to the LEED rating system, for which the third comment period is now closing.
The standard test for determining the percentage of biobased content is ASTM D6866. There are several standard methods, all of which are applicable to any products that contain carbon-based components. The test measures and differentiates between product carbon resulting from biobased input and that from fossil-based input. The scope of this test, however, does not include any guidance as to whether the percentage of content meets requirements for various definitions of biobased.
The USDA bio-preferred program is the most recognized program across all industry sectors for defining biobased, and references ASTM D6866 as the method for determining the percentage of content. The IgCC references the same test. Recently the IgCC approved the definition of biobased building products that establishes minimum 75% biobased content, raising the bar from 50% in previous versions.
Standard definitions don't discourage some companies from adding a small percentage of biobased material into a product and putting "bio" in the name. Want to know if the material is really biobased? Ask for the results of ASTM D6866.
Alpar Architectural uses deTerra� biobased polymer, a material that is 93% biobased when tested to ASTM 6866, making Alpar's products the only wall protection products that can meet the IgCC's definition for biobased. While we're proud to be first, we hope our commitment to using rapidly renewable, non-toxic materials will help inspire other manufacturers to do the same.
Still have questions? Please don't hesitate to contact me.
Sincerely,
Lisa Britton, CSI, CCPR, LEED AP BD+C
President