Corrugated sheet metal roofing is one of the oldest types of roofing in North America and has been used successfully for centuries. Originally designed to be an ideal, fire-proof and low-cost industrial and agricultural roofing product, the heavy, wavy-patterned sheets were quickly applied to weatherproof barns, agricultural sheds, factories and warehouses, where appearance was not an issue. Some of the old workhorse material can still be seen today on abandoned buildings and dilapidated barns, rusted–and amazingly, displaying only a few holes after a century or more of service.
History Of Corrugated Sheet Roofing: A Blemished Past
The use of corrugated roofing may have been a touchy subject in urban areas, where the so-called “sheet iron roof” was often compared to rusty tin cans. It was the last choice in upscale urban neighbourhoods, perhaps justifiably so, for the untreated, poor-quality iron sheeting soon rusted, quickly becoming an eyesore. Except as emergency roofing, corrugated iron was seldom installed where other, more ‘modern’ and attractive choices were easily available, such as cedar shakes, asphalt shingles –or even the lowly asphalt roll roofing offered in green, red, or black, the small-budget product usually reserved for stables, garages and coops.
Steel Roofing goes Mainstream
Corrugated metal roofing has progressed a long way from the heavy, rust-prone sheeting it once was. Corrugated sheet roofing is still available in the traditional wavy design, but any similarity to the product of the past ends there. It’s modern steel counterpart has moved progressively into mainstream roofing, offering lifetime durability, weather resistance, ease of application, and visually attractive colours in a variety of profiles. Variations of the same product are used as high-quality siding and offered as stone-coated steel shingles, a high-end product.
Materials and Warranty
The typical steel sheeting of today is made of treated, high-grade steel, lightweight, and strong. Even the most generic, “steel-coloured” corrugated roof cladding today is manufactured of high-quality zinc-coated steel or aluminized steel. Variations of surface treatments may include modern high-performance epoxy coatings over rust-inhibiting primers, or the virtually indestructible high-performance baked industrial coatings offered in a variety of fade-resistant colours, often with a lifetime warranty. Sheet lengths can be conveniently customized for individual applications.
Corrugated Roofing Applications
Modern steel roofing can be applied directly over existing asphalt shingles if the surface is prepared properly, avoiding tear-off costs and landfill fees. It may used where the existing roof is first strapped to avoid placing the new roofing directly on problematic roofs that may need to be straightened, or where the old surface is excessively rough. On new construction steel roofing can be applied directly on new roof sheeting or on strapped roof construction without plywood decking.
A Contemporary Lifetime Roofing Installation
Corrugated steel roofing is considered to be a lifetime installation, potentially outlasting three asphalt roofs in the same time period.
Corrugated steel sheet metal products now offer the homeowner and industry alike a durable, attractive, one-time roofing and siding solution coupled with a highly competitive lifetime cost when compared to other roofing products.