Duration Millwork’s Simulated Shake Siding is made from polymer-infused fly ash and comes in 4-foot panels that butt together tightly to create a seamless shadow line. The lightweight panels can be blind-nailed with a reveal between 4 and 6 inches. According to Duration, the cladding doesn’t require back or edge sealing, can be painted any color without priming, and won’t rot, decay, or be affected by insects or high heat. The cladding has no clearance requirements and installs with much less labor than individual wood shakes. Pricing starts at $12.90 per square foot. durationmillwork.com