Asphalt shingles are economical and versatile, which may be why they represent more than 80 percent of the roofing market. They are suited to roof pitches from 4 in12 to vertical, and are available across a wide range of quality, cost, and style. Asphalt shingles are compatible with many different kinds of flashing and edging products, and don't require specialized accessories for roof edges, wall terminations, chimney or vent flashing. There are many different types of Commercial roofing, below are the most commonly used. Annapolis roofing contractor, Anne Arundel county roofing contractor, Maryland roofing contractor, Annapolis commercial roofing contractor, Annapolis residential roofing contractor, Roofing contractor Annapolis, Prince George county roofing contractor, EPDM roofing.