Demands on Structure

Metal Roofs Place Fewer Demands on Structure 

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Typically, low slope metal roof systems vary in weight from 40 to 135 pounds per 100 square feet, making them among the lightest roofing products and the easiest to install. A lightweight roofing system also places fewer demands on a building’s structural support system, an important consideration in earthquake-prone areas.

  Unlike non-metal systems which require an underlying substrate or deck, low slope metal roofs can be applied directly over bar joists or purlins. And, because of their interlocking or active fastening systems, metal roof panels are designed to meet the requirements of ASTM E1592, UL 580, UL1897 and other severe wind and uplift tests.

  Metal roofing products come in a variety of materials as well as many colors, textures and profiles. To ensure longer life, almost all low slope roof materials are protected from the elements by high performance, highly durable metallic coatings.

  While the idea of protecting a building with metal originated centuries ago, the concept is still valid today. Whether the goal is many years of low-cost, low maintenance, problem-free performance, or an environmentally responsible approach to roofing, low slope metal roofs make sense.

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