Most panel siding is exterior-grade plywood, either 1/2 or 5/8 inch thick, or some hardboard, such as cement fiber. . Cover the walls with rigid foam board insulation, fastened to wall sheathing or studs with broad-headed galvanized nails that have plastic . Install batten boards over panel joints for that style of siding.
For all exterior applications, required installation includes a scratch coat (also known as cement plaster coating) over a water-resistive barrier. . wall surfaces of plywood, OSB, concrete board or gypsum sheathing, supported by wood or steel.