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What Are Low Slope Metal Roofs? Low Slope Metal Roofs provide years of low cost, low maintenance performance. Low Slope Metal Roofs have been a preferred roof covering for commercial, institutional and industrial buildings for years because of their ability to protect against the elements, to allow water to drain away from the roof surface, and to keep building contents and occupants dry and comfortable. Recently, building owners and architects have come to recognize and appreciate still other attributes of Low Slope Metal Roofs – their long service life, low life cycle cost, sustainability, recyclability, low maintenance requirements, light weight and resistance to wind.

System

Low slope structural roofing, generally used on roof pitches ranging from ¼:12 to 3:12, consists of interlocking panels, commonly called standing seam roofing, that run vertically along the roof surface. These panels generally come with a painted mill finish or a clear acrylic finish.

Henry® LowSlope™ One-Ply Self-Adhered Waterproof Roll Roofing. Offers a complete SBS roofing membrane system; Ideal for slopes greater than 1/2” per.

Some metal roofing used on low slope applications requires machine seaming during installation to ensure a watertight seal. A seaming apparatus is simply rolled along the panels to crimp the panel seams together. A standing seam design assures adequate draining from rain and snow, effectively eliminating ponding, leaks and related problems typically associated with built-up roofs. In retrofit projects, a sub-framing system is attached to the existing flat roof surface to provide a minimum ¼:12 roof pitch.

Moreover, Low Slope Metal Roofs are not prone to the degradation experienced by organic materials, enabling these roofs to better resist the elements. This, in turn, results in a longer life span and a very low annual operating cost. Study Substantiates Low Life Cycle Cost: As a result of the durability and reliability of these systems, low slope metal roof manufacturers offer 20- to 40-year warranties on their products. Their long life and low maintenance requirements also put metal roofs on a very attractive life cycle cost track.

How

This was confirmed in a 2005 study of low slope roofing conducted by Ducker International. Respondents to the study said they expected the life cycle cost of a metal roof, including outlays for maintenance, to be about 30 cents a square foot per year, far less than their expectations for built-up and single-ply roofs, at 37 cents and 57 cents, respectively.

Metal roofs also have a significantly longer expected service life than either built-up roofing or single-ply roofs. Study participants said they expect metal roofs to last 40 years – 17 years longer than built-up and 20 years longer than single-ply systems. Not only can low slope metal roofing contribute to the bottom line, it can also contribute to LEED credits, which are awarded to buildings that use high recycled content and other “green” construction materials. A typical low slope metal roof has at least 25% recycled content, and at the end of its long useful life is 100% recyclable. In addition, “cool metal roofing” can significantly reduce a building’s long term energy use. With heat deflecting metal coatings, energy costs can be reduced up to 40% or more, according to a study conducted by Oak Ridge National Laboratory. Metal Roofs Place Fewer Demands on Structure: 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.

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