Metal Roof Installation – Landmark metal roof, hemlock green. Metal roof installation for main office building at Ganaraska Conservation Area, with Landmark metal roofing in hemlock green. A matching metal roof was also installed on a nearby gazebo. Landmark Roofing is Moffatt Bros.’ custom line of metal roofing panels, made of tough 24 gauge Kynar Finished Steel. The panels, flashing and trim detail are precision-cut for a neatly finished and extremely durable roof.