Gypsum Board, available in thicknesses of 9 mm, 12 mm, 12.5 mm, and 15 mm, is a widely used building material for interior walls and ceilings. Composed of a gypsum plaster core between layers of thick paper, it offers a smooth, durable surface that can be painted or wallpapered. Gypsum Board is valued for its lightweight nature, fire resistance, and soundproofing capabilities, making it ideal for both residential and commercial construction.