Siders and deckers are involved in the application of specialized sheeting, cladding, insulation and decking products on construction projects. Siding typically appears as part of the outer shell of a building, while decking usually takes the form of sheets of metal placed on the beams that make up the building skeleton. A deck provides the structural support for a roofing system. Siding and decking work requires strength, flexibility and a great deal of skill. The work is performed year round, often in extreme weather conditions. Siders and deckers work on elevated platforms and swing stages, and are required to lift and install panels that are often large and heavy.