Nova USA Wood Products developed its Exo-Clad Rainscreen QuickClips to accommodate natural swelling and shrinking of wood siding, regardless of the amount of moisture. Made from marine-grade extruded aluminum and fastened with #10 pan-head screws, the QuickClips work with hardwood siding, such as batu, ipe, and cumaru, as well as softwoods like cedar, redwood, and Douglas fir. Clips also provide a 3/4-inch stand-off from the structure and can be screwed right into the studs over housewrap. We found them online for $1.90 each.