Special trade contractors primarily engaged in the installation of roofing, siding, and sheet metal work. Sheet metal work performed by plumbing, heating, and air-conditioning contractors in conjunction with the installation of plumbing, heating, and air-conditioning equipment are classified in SIC 1711: Plumbing, Heating, and Air-Conditioning.
Roofing, Siding, and Sheet Metal Contractors
Construction services offered by the roofing, siding, and sheet metal industry include architectural sheet metal work; erection and repair of metal ceilings; copper smithing in connection with construction work; metal downspout installation; sheet metal duct work; metal gutter installation; roof spraying, painting, or coating; all roofing work, including repairs; siding installation; skylight installation; and tin smithing in connection with construction work.
The construction industry can be divided into three major divisions: general building contractors, heavy construction contractors, and special trade contractors, which include those who install roofing. General building contractors build residential, industrial, and commercial buildings, while heavy construction contractors build structures such as roads, highways, and bridges.
Special trade contractors usually focus on one trade and work under the direction of general contractors, architects, or property owners. Beyond completing their work to specification, special trade contractors have no responsibility for building the structure in its entirety.
Besides new installations or re-roofing, the market can be divided by type of roof, either low-slope or steep-slope. The low-slope market includes commercial and industrial buildings and some apartment houses. The steep-slope market is primarily residential.
Sometimes working in conjunction with architects, roofing contractors choose from a selection of materials that include thermoset single plies (e.g., EPDM, CSPE/Hypalon, PVC), built-up roofing (BUR), and fiberglass, and organic asphalt shingles. In the re-roofing industry the contractor decides what type of roofing system to use and which manufacturer's product to install. With new installations the architect usually decides which roof...