MTL Holdings is the leader in innovative, sustainable, building envelope solutions. With a family of brands dedicated to serving the roofing industry, MTL Holdings boasts the broadest portfolio of tested roof-edge solutions. Driven by their shared purpose of protecting their family, friends, and neighbors at the places they go the most, MTL Holding’s companies - Citadel Architectural Products, Hickman Edge Systems, and Metal-Era - continue to be industry pioneers, collaborating on and driving building performance code, product innovation, and bringing new, industry-changing technologies to the marketplace.