Flooring is constructed of HDF and a thick melamine backing providing superior structural stability. The wear layer is AC3 rated which means it is suitable for both residential and light commercial installations. Edges and ends are square. Flooring installs using the floating method and has a proven glueless locking system that snaps in place and prevents gapping. Each case contains 25.64 sq. ft. or 10 planks that are each 7.44" W. x 49.64" L. x 7.0 mm thick (slightly over 1/4" thick). 15/20 year residential warranty. Padding underlayment is required for all installations.