Type X Drywall

is a fire-rated gypsum wallboard reinforced with glass fibers in its core, making it stronger and more resistant to fire than standard drywall, often used in assemblies requiring 1-hour fire ratings for walls between garages and living spaces, or in commercial settings, and is typically 5/8-inch thick. It provides crucial fire protection by maintaining structural integrity longer under intense heat, allowing time for escape, but it is heavier and should not be confused with Type C, which offers enhanced fire performance.