Making its debut in 2014, Sno Gem® is proud to announce the launch of the 1" Bar Sno Blockade™ system to our line of innovative snow retention systems. The Sno Blockade™ system is available in standard mill finish aluminum or painted in either a powder coating or Kynar finish. It is easy to install with few required components, regardless of whether installed on a new or existing standing seam metal roof system.