Capitol Building Supply

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Your local supplier of high-quality construction and building materials for any commercial or residential project near Gaithersburg, Maryland. In addition to gypsum drywall, steel framing, acoustic ceiling tile products, and insulation, we supply a comprehensive inventory of other building materials, including cornerbead, fasteners, access doors, FRP panels, lumber, ready-mix joint compounds, surface protection, safety/personal protective equipment, internal and exterior finishes, ladders, drywall carts and a wide variety of hand and power tools by the top manufacturers.