20140305060 | SURFACE UNDERLAYMENT - A flooring system is constructed on a base. The flooring system includes a permeable barrier layer, a porous underlayment, an impermeable sealing layer, and a flooring. The barrier layer is configured to cover the base. The underlayment overlies the barrier layer, with the barrier layer preventing binding of the underlayment to the base while permitting fluid to pass between the base and underlayment. The underlayment presents a top face, and the sealing layer coats the top face of the underlayment. The flooring is fixed relative to the top face of the underlayment. | 10-16-2014 |