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On site Framing vs. Pre-fabricated framing. On site framing is the standard framing technique in which the framer develops the frame on the actual site of the project following the completion of the foundation. The pieces of wood are cut on site and are assembled piece by piece. In the pre-fabricated method, walls and sections are built at a plant and shipped to the construction site to be assembled. Though these methods are cheaper in theory, they often end up costing more than on site framing. However, pre-fabricated framing does have the advantage of speed. The various walls and sections of the house can be ordered in advance and assembly is considerably faster than with traditional on site framing. There are also choices to be made regarding the framing of the roof, which are guided by the complexity of the project and of the roof. With complex roofing systems, the framer hand cuts the roof piece by piece, which is time consuming and expensive. This method is usually employed in complex custom-made luxury houses, and is rarely used on smaller residential homes. With truss systems, the roof is partially assembled in a plant and is then shipped to the home site to be assembled by the framer.
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