A roofer or roof mechanic is a construction worker who specializes in roof construction. Roofers concentrate on the application of materials that waterproof and/or weatherproof buildings, designed material—as a substrate for the roofing materials to be installed on, the rafters, beams, and trusses are the frame or skeleton for the roof to be built upon. Roofers must be able to work, have good motor skills and possess general carpentry skills.
In the United States and Canada, they’re often referred to as roofing contractors. The most common roofing material in the United States is asphalt shingles. In the past, 3-tab shingles were used; nowadays, “architectural” or “dimensional” shingles are becoming very popular

There are 4 main types of roofers: shinglers, who primarily install shingles, shakes, tiles, and other nail-on products on roofs with 5:12 pitches or above; metal roofers, who focus on metal panels; single-ply or “flat” roofers, who focus on roofs such as single-ply or foam roofs; and “hot” roofers, who work using tar-based products. It is not uncommon, however, for companies to have their roofers to multiple styles of roofing, and certain manufactures will only allow specifically selected installers, thus making these 4 types limiting.
Selecting a properly certified and high quality roofing contractor is important and often a difficult task for consumers who are unfamiliar with the roofing industry. Roofing in the Ontario region is an unregulated industry. It is important to select certified roofers who will be in business to honor their warranty in the future. There are a large number of roofing contractors who are not certified and have both low quality installations and poor workmanship. The average start-up business is usually closed within three years, and may be out of business when potential roofing problem could arise.
Roofers using fall-arrest equipment. They are roofing.
The National Roofing Contractors Association, is one of the construction industry’s trade associations and a voice in the roofing industry for information, education, technology and advocacy. Founded in 1886, NRCA is a nonprofit association that represents all segments of the roofing industry, including contractors; manufacturers; distributors; architects; consultants; engineers; building owners; and city, state and government agencies. Roofing is a big industry.
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