Bark House Bark Shingles and Panels become the first Cradle to Cradle Certified(TM) Platinum Product!By Chris McCurry / August 5, 2016 Bark House Shingles First to Earn Cradle to Cradle Platinum Certification Poplar shingles and wall panels achieve Platinum level across all five Cradle to Cradle categories with sustainable materials and a deep community commitment.