![]() ![]() ![]() One limitation of both single-ply metal roofs and single-ply metal shingles is that they cannot resist wind uplift pressure.įor that reason, these types of roofs are usually installed on flat or low slope buildings where wind uplift pressures are minimal or non-existent. Single-ply metal shingle roofs are very popular on residential buildings. Single-ply metallics are not in common use today, although they were more common in the past. ![]() There are two types of metal roofs: single-ply metal roofs and single-ply metal shingle roofs. In colder climates, two layers of asphalt-based material are used to achieve the same waterproofing effect. The waterproofing coating usually consists of an asphalt-based material that is applied to the roof deck, then coated with a layer of bitumen. They consist of a single layer of metal, usually aluminum or steel, which is either coated with an asphalt-based waterproofing material or is covered with a layer of bitumen and then coated with a waterproofing coating on top. Metal roofs are the most common type of roofing on residential buildings. Metal roofs are used for both commercial and residential buildings in all climates. The choice of roof type varies based on building type and location. The thickness ratio is the number of inches of roof covering that are covered by one inch (or fraction thereof) of material.Īsphalt-based roof coatings or bitumen are used on the roof decking or sheathing to provide a waterproofing barrier. The roofing materials’ weight and their thick/thin ratios are important to the choice of which type of roof will be appropriate for a building’s structure. Roof decking in a metal roof consists of two layers of either aluminum or steel, and decking sheathing may consist of two layers of either aluminum or steel. ![]()
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