USG is expanding its portfolio of innovative lightweight wallboard products with the introduction of Sheetrock Brand UltraLight Panels Firecode X. This 5/8-inch panel is the industry’s first lightweight type X gypsum panel and is designed for commercial and residential construction. It weighs up to 15 percent less than competitive type X board. All Sheetrock Brand UltraLight panels are lighter than competitive boards with a higher strength-to-weight ratio and better sag resistance, while delivering comparable sound performance and impact resistance.