News Brief

Bark Cladding Is First Cradle to Cradle Platinum Product

C2C Platinum certification sets a very high bar for sustainability. A decade in, Bark House shingles are the first product to make the grade.

Bark House shingles at the University of Chicago

Bark House shingles, shown here in the University of Chicago childcare center, were recently certified as the first Cradle to Cradle (C2C) Platinum products.

Courtesy Highland Craftsmen Inc.
Cradle to Cradle (C2C) was the first certification to attempt to define in 2005 what true sustainability might look like in a building product.  Since then, several hundred products have been certified at C2C’s lower levels: Basic, Bronze, Silver, and Gold. But until now, Platinum certification, the highest level, has appeared more aspirational.

The first product to achieve C2C’s highest bar? Bark. Specifically, Highland Craftsmen Inc. Bark House shingle and wall panels. The product is made from tulip-poplar tree bark that has been reclaimed from logs, flattened, dried, and trimmed into a durable finished product.

Harder than we thought

In the 2002 book Cradle to Cradle, William McDonough, FAIA, and Michael Braungart, Ph.D., envisioned our products and everything that goes into them as safe “nutrients” in ongoing technical and biological cycles. (For a status report on these concepts and how they’re entering our buildings, see Circular Economy at Scale: Six International Case Studies.) The C2C certification fleshed out this vision with five certification categories:

  • material health
  • material reutilization
  • renewable energy and carbon management
  • water stewardship
  • social fairness

A product’s overall rating is based on its lowest score in these five categories, so if you had Platinum for social fairness but Silver for water, you can only get an overall rating of Silver.

When BuildingGreen took an in-depth look at the certification in 2007 (see Cradle to Cradle Certification: A Peek Inside MBDC’s Black Box), the consensus was that a certified Platinum product:

  • was at least three or four years away
  • would probably be something “simple” like a coating
  • would be the result of a conscious design process, not a conventional product modified to meet the standard

It’s clear that C2C Platinum was harder than we thought.

Stepping up from Gold to Platinum

Highland Craftsman has been working with C2C (which several years ago moved from a private consultancy to the Cradle to Cradle Products Innovation Institute, or C2CPII) since 2008, and Bark House shingles were previously certified Gold. According to Highland and C2CPII, the company undertook the following measures to meet Platinum requirements in C2C’s five categories:

  • Material Health: Bark House shingles are 100% bark with no additives or coatings.
  • Material Reutilization: The bark is harvested from trees that are already on their way to the sawmill. At the end of their useful life, the shingles can be composted, mulched, or otherwise returned to nature. It should be a long life: the company has been around for 25 years and says it monitors installations of similar bark shingles that pre-date it by another 60.
  • Water Stewardship: No water is used in manufacturing, and the company participates in regional river and stream stewardship.
  • Clean Energy and Carbon Management: All of the electricity used to make the shingles is generated with onsite solar power. The company keeps its footprint small by harvesting 90% of raw materials within 50 miles of its facility. According to the company, it dries its bark with gas-fired kilns and makes up for those carbon emissions by generating excess onsite solar power. The company also manages its carbon footprint with its product, which keeps carbon out of the atmosphere for much longer than it would otherwise. The bark would normally degrade naturally or be burned, releasing its carbon much sooner.
  • Social Fairness: Highland Craftsmen is B Corp-Certified. The B Corporation framework is used by companies that have a mission to support the environment and their communities, and to provide optimal working conditions. This area of the C2C standard is also where material-specific certifications are covered. The company told BuildingGreen that it has worked to maintain a Forest Stewardship Council (FSC) certified supply but has been unable to do so because of lack of demand and FSC’s lack of scalability for small Appalachian landowners. The company meets C2C’s requirements for social fairness in part by supporting logger education programs that address sustainability and worker safety.

“Holistic approach to business”

“At Bark House, we have always taken a holistic approach to business, from the low impact of our product lines to the high impact of our social outreach,” said Chris McCurry, cofounder for The Bark House at Highland Craftsmen Inc., in a press release. “This mentality is key to creating balance, and without balance, systems will ultimately fail.” According to McCurry, the company didn’t make substantial changes in its product or manufacturing process in going from Gold to Platinum; it simply “reorganized processes in alignment to Cradle to Cradle’s five points.”

“Achieving an overall Platinum certification demonstrates the depth and commitment of the company’s efforts to provide safe products that can be perpetually cycled and are manufactured in ways that respect humans and the environment,” commented Stacy Glass, vice president for the built environment at C2CPII.

Bark House shingles come in a standard grade as well as a thicker, premium grade that has deep furrows and more-pronounced shadow lines. The company’s interior-grade shingles and large wall panels are certified Gold under C2C. These are a more complex product: they can be laminated to order (low-emitting substrates are available) for use in cabinetry or wall mounts, or as an interior wall covering. 

Published August 4, 2016

Roberts, T. (2016, August 4). Bark Cladding Is First Cradle to Cradle Platinum Product. Retrieved from

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