What Is Corrugated Roofing?

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Corrugated roofing is made of overlapping sheets of metal, iron, steel, aluminum or fiber glass, which are joined together at the sides. The term "corrugated" refers to the shape of the roofing panels, which are a series of concave half-round shapes (grooves) alternating with convex half-round shapes (ridges), with their curves smoothly transitioning into one other. Corrugated roofing is used for roofs that have pitches of 3 to 12, or greater—with the pitch corresponding to the inclination and slope of the roof.

Types

  • Corrugated roofs are available in several quality grades of metal, translucent plastic, iron, galvanized steel and fiber glass; tile thicknesses; and the thickness of the galvanization (outer, protective coating). According to Gilbert Brys in the book “Fiber and Micro-Concrete Roofing Tiles,” corrugated roofing sheets range in thicknesses from 0.15mm to 1.22mm, while the thickness of the galvanized coating lies within the range of 60 microns.

Properties

  • Corrugated roofing is designed to be strong, durable, insulating and lightweight. They are able to withstand large amounts of weight without buckling under pressure, and can effectively keep out the elements.

Advantages

  • Corrugated roofing structures are lightweight and inexpensive in comparison with other roof structures; have simple laying procedures that can be attempted as a do-it-yourself project; and are readily transportable. Many manufactures develop homeowner-friendly assembly systems that easily snap together, making installation easy and quick. Corrugated roofing structures are more rigid than flat roofing structures, providing more dimensional stability and structural integrity. They are available in a wide range of sizes, colors, thicknesses and materials, allowing homeowners and contractors to customize a roof as per user requirements.

Disadvantages

  • Outer, protective galvanized layers are susceptible to corrosion and rust. Aluminum corrugated roofing tends to lose its natural reflective properties and acquires a dull, gray color with time. Plastic, fiberglass, aluminum and steel roofs fail when exposed to excessive heat and/or fires. Corrugated roofing structures require constant maintenance and care.

    While corrugated roofing has numerous short-term advantages, they tend to under-perform in the long-run, developing serious defects, including poor heat and noise insulation, poor quality of galvanized layer due to corrosion, unattractiveness and condensation that deteriorates false ceilings.

Uses

  • Corrugated roofing is used on residential, industrial, agricultural and commercial buildings. They are a viable choice for greenhouses and outdoor decks.

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References

  • Photo Credit roof image by Eldin Muratovic from Fotolia.com
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