US: USG Sheetrock® Brand UltraLight Gypsum Base Imperial is now being manufactured at six USG plants. The panel is the sixth product in USG's lightweight wallboard portfolio and will be available at retail, specialty dealer and pro-dealer distributors nationwide in September 2014. The launch extends USG's position as the industry's leader in lightweight innovation. The gypsum base panel is used when a project calls for a plaster veneer finish, and is up to 30% lighter than the current ½inch USG Imperial® Gypsum Base panel. The traditional panel will be discontinued upon the launch of the new panel.