Vinyl Composite Tile, also known as VCT, is a material preferred by many contractors and builders for flooring. Composed of 80% limestone. Although VCT is popular for commercial and industrial uses, it is also suitable for home flooring. Recommended for installation of properly prepared suspended wood floors and approved underlayments, concrete on all grade levels, terrazzo, ceramic, and marble. 1/8 In. thick, 12 In. x 12 In., 45 Sq. Ft. per case.