Improve any residential laminate floor's life span with this MONO SERRA floor underlay. It supports the boards from below to limit dents and dings. Each roll measures 34 5/16 in W x 1/8 in T x 35 ft L. To ensure the floor has a long-lasting life, this Mono Serra humidity-resistant underlay for laminate flooring inhibits moisture from the subfloor from reaching the surface. The floor padding creates a soft layer under the floor, to make the space comfortable to stand on. Use it to level out slight abnormalities on the existing subfloor to give the floor an even appearance. This soundproof underlay for laminate flooring reduces the noise transfer between rooms. Energy-efficient, its insulating ability works to regulate temperatures within the house. It covers approximately 100 sq. ft.