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Slate Roofing An experienced commercial roofing contractor will usually provide a variety of choices for the rooftop but there are many that specialize in some kind of roofing like shingles or metal roofing. Make sure that you consult the contractor if they specialize and have many array of choices to get the specified finish and look of your respective commercial building that you would like. If you have to have a specific kind of roofing make sure to ask the contractor about their expertise in putting on that specific type of roofing. http://smithbrothersroofing.com/services