Press Release Royal Building Products Partners with U.S. Lumber to Distribute Royal’s Trim and Mouldings Product Lines MARION, Va. (03/31/14) — Royal Building Products today announced the addition of U.S. Lumber to Royal’s southeast and mid-Atlantic distribution network. Product lines now available through U.S. Lumber include Royal trim and mouldings profiles, featuring S4S Trimboard™, Royal Trimboard® Sheet Stock, fascia, window and door surrounds and decorative moulding. “We have ambitious goals for the Exteriors division of Royal, and U.S. Lumber is an ideal partner for helping us generate more demand for our products,” said Simon Bates, Vice President and General Manager, Royal Exteriors. Jeff McClendon, President, U.S. Lumber, has equally high expectations. “With the rapid growth of new low-maintenance product alternatives, we are constantly adding high quality brands that deliver on that promise to our contractor-oriented, pro-yard customers. The Royal brand is a perfect addition to that list.” US Lumber Supply currently has 7 locations throughout the southeast and mid-Atlantic states. About Royal Building Products Royal Building Products is a division of Axiall Corporation (NYSE: AXLL, formerly known as Georgia Gulf Corporation). The company manufactures and distributes leading materials for the home remodeling, building and municipal construction markets. For over 40 years, the company’s commitment to quality, innovation and customer relationships has attracted the loyalty of a growing number of building professionals, homeowners, architects, engineers and distributors to its products. With operations throughout North America, Royal Building Products offers the renovation, remodeling and new construction industries a broad range of innovative products including siding, exteriors and shutters, soffit, exterior trim & mouldings, decking, interior mouldings, window profiles & patio doors. Royal Building Products also manufactures pipe and fittings for the plumbing, electrical, municipal, industrial and irrigation markets. For more information, please visit our website: www.royalbuildingproducts.com. Follow us on Twitter and “Like” us on Facebook. About U.S. Lumber U.S. Lumber is a leading distributor of a broad line of building materials, specializing in trim and engineered products including exterior siding and trim, interior millwork, flooring, patterns, beaded ceiling, columns, decking, railing, and a full line of engineered wood components. U.S. Lumber distributes across the entire Southeast and mid-Atlantic United States with branches in Atlanta, Greenville, Raleigh, Nashville, Jacksonville, Mobile and Baltimore. In collaboration with their product manufacturers who represent the best wood and composite brands in the industry, U.S. Lumber takes a pro-active approach to the development of new products by focusing on teaching and training builder and dealer sales personnel on the benefits and value of new construction materials. The company is committed to serving customers on a personalized basis with an emphasis on Knowledge, Trust, and Responsiveness. For more information, please visit www.uslumber.com. MEDIA CONTACTS For Corporate Queries: Alan Chapple Axiall Corporation 770.395.4538 Alan.chapple@axiall.com For Media Queries: Caitlin Mills (410) 962-6442 crm@planitagency.com Amber Valero (410) 962-6436 acv@planitagency.com For Royal Exteriors or Product Queries: Marilyn Chase Royal Exteriors 800.366.8472 Marilyn.chase@royalbuildingproducts.com For Interactive, Design or App Queries: Kriss Swint Royal Exteriors 800.366.8472 Kristine.swint@royalbuildingproducts.com