Single-ply Roofing is wide width sheeting meant for low slope roofs. It has far fewer seams than asphaltic rolled roof systems and doesn't require dangerous torches or hot asphalt for installation. Single-ply roofing systems are the most common for commercial flat roofs.
Standing Seam Metal Roofing System are one of the most durable and weather-tight roof systems available in the industry. It's concealed fastener design ensures that the fasteners aren't exposed to the elements.
Slate roofing tile has a long and storied history, and is generally known as one of the highest quality, longest lasting roofing materials on the market. Unlike many other roofing materials, slate tiles themselves are completely fire proof.