This plating is used to provide a direct transfer and heat distribution from the PEX tubing to a wooden subfloor. They can be stapled to the underside of the subfloor in a DryBelow™ system or used above the subfloor in a DryAbove™ system. End to end gaps between plates should be from 3 to 6 in(75 to 150mm). Plates measure 24 x 4-1/4 in(610 mm x 108 mm).