Metal Roof Installation for Gazebo – Landmark metal roof, Hemlock Green. This Gazebo at Ganaraska Conservation Area was fitted with a metal roof, colour-matched with roof of the main office building, also installed by Moffatt Bros. The hemlock green colour harmonizes well with the neutral tones of the gazebo’s exterior and its natural surroundings. Landmark metal comes in 28 classic colours and offers many benefits, including extreme durability, energy savings and low maintenance costs.