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An exterior cladding system that is supported entirely by the frame of the building, rather than being self-supporting or load-bearing.

The frame of a commercial building is designed to withstand certain loads and conditions. Architects and engineers will determine whether a steel frame or reinforced concrete frame is best suited for the building. Glass is a common cladding material for commercial buildings, although other materials are available for this purpose. In some cases, the entire building frame and cladding are concrete. There is very little wood used in commercial buildings because of the higher fire-resistive design standards required by building codes.

Interior partitions are most often constructed of light-gauge steel studs covered with drywall. Interior finishes include paint, wall coverings, carpet, tile, marble, granite, and acoustic ceilings.

Most commercial buildings have flat roofs covered with a bituminous membrane with gravel ballast or some type of a vinyl or rubber covering. Commercial buildings with sloped roofs are often covered with prefinished metal roofing.