Name: Aluminum Lock Roofing. Descripton:Aluma-Lock and Copper Lock roofing shingles from Aluminum Lock Roofing have been manufactured in Salt Lake City, Utah since 1957. Our shingles use an interlocking system that has proven durable and effective through five decades of hot summers and cold snowy winters. If you take the time to compare Aluminum Lock with other roofing systgems, you will see why Aluminum Lock shingles are superior. Considered a lifetime roof, many customers have Aluma-Lock shingles that are over 50 years old, and should last 50 more. Aluminum Lock shingles are an ideal roofing material. They can be walked on. They reflect heat in the summer and snow slides off in the winter. They won't rot, curl, dry out, crack or deteriorate with age. Aluminum will never rust.