James Hardie HardiePanel Sierra 8 Cedarmill Vertical Siding is a fiber cement siding designed to mimic the look of real wood siding with less maintenance, better wear and a long life. Sierra 8 Panels feature a vertical groove that runs the length of the board every 8 in. to add interest and detail. HardiePanel exterior panel siding is Engineered for Climate and designed to hold up to the changing weather conditions in the environment where it is installed. Noncombustible cladding complies with ASTM E136, does not burn and will not attract insects and pests including woodpeckers and termites. HZ10 formulated house siding is made to withstand high temperatures, humidity, moisture, sun, hail, tropical storms and hurricane winds. Board is pre-primed using a primer with a yellow hue allowing for maximum paint adhesion on the jobsite. Paint it any color within 180 days of installation using an acrylic water-based exterior house paint.