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Press release from Business Wire

American Gypsum Wallboard Passes Industry's Toughest Mold Resistance Test

Wednesday, April 21, 2010

American Gypsum Wallboard Passes Industry's Toughest Mold Resistance Test17:15 EDT Wednesday, April 21, 2010 DALLAS (Business Wire) -- American Gypsum announced today that its complete line of M-Bloc® mold and moisture resistant gypsum panel products has passed the difficult ASTM G 21 mold resistant testing with the best possible score of 0 as verified by an independent laboratory, certified in accordance with ISO 17025-2005. M-Bloc® is one of only a handful of mold resistant gypsum products to achieve the maximum mold resistance scores on ASTM D 3273 and G 21 as well as to have earned the GREENGUARD Indoor Air Quality Certified® status and GREENGUARD Children & SchoolsSM Certification. “Design professionals, contractors and consumers can be confident in selecting American Gypsum's M-Bloc® panel products with the knowledge that they have attained the best results possible when tested to the industry's most rigorous standards for mold resistance and indoor air quality,” said Keith Metcalf, Senior Vice President of Sales and Marketing. For more information about our M-Bloc® family of mold and moisture resistant products please visit http://www.americangypsum.com. About American Gypsum American Gypsum Company LLC, based in Dallas, TX, is a subsidiary of Eagle Materials Inc. (NYSE: EXP) and is a full-line producer of gypsum board products, including M-Bloc® with Mold & Moisture Resistance panels.