The Roll-On Stick-On Rainscreen is a nonstructural corrugated aluminum furring strip designed to achieve maximum open wall area to dry moisture and condensation. A 3/8-inch air gap allows for air flow and drainage, and to simplify installation, a self-adhering membrane helps to reduce the number of fasteners needed to attach the product. The price ranges from about 89 cents to 99 cents per foot. rollonrainscreen.com