DESCRIPTION: Prime’s PBU & U Panels provide 36” coverage and are a durable, cost-efficient roofing and/or wall systems. The purlin bearing leg, which is the only difference between the PBU & U panel, is designed to provide a more consistent panel alignment and fastener engagement. Available in our standard 26 gauge, the PBU & U Panels are low-maintenance, impact-resistant, and offered in a variety of color options, making them an excellent choice for your next project.