Chicago, Illinois, USA, 13 April 2009  --  USG Corporation (NYSE: USG), a leading building products company, will hold a conference call and webcast to discuss first quarter 2009 results on 21 April 2009, at 11:00 a.m. Eastern Time (10:00 a.m. Central Time).

This call and webcast can be accessed at USG's Web site at http://investor.usg.com. To participate by phone, call 10 minutes before start time by dialing 1-800-315-2944 (USA and Canada) or 1-847-413-2929 (international). The passcode is 24297438.

A replay of the webcast will be available on the USG Web site until 01 May 2009. A telephone replay of the call also will be available. The replay dial-in number is 1-888-843-8996 (1-630-652-3044 for international callers), and the passcode is 24297438. The telephonic replay will be available until 01 May 2009.

USG Corporation is a Fortune 500 manufacturer and distributor of high-performance building systems through its United States Gypsum Company, USG Interiors, Inc. and L&W Supply Corporation subsidiaries. Headquartered in Chicago, Illinois, USG serves the residential and nonresidential construction markets, repair and remodel construction markets, and industrial processes. USG's wall, ceiling, flooring, and roofing products provide leading-edge building solutions for customers, and L&W Supply center locations efficiently stock and deliver building materials nationwide. For additional information, visit the USG Web site at www.usg.com.