Currently available in a 7/16-inch board in four widths, Microposite boards are constructed using a combination of lightweight Perlite “microspheres” and proprietary resins. The resulting material weighs 50% less than fiber-cement, while offering an R-value 3.5 times higher, the maker says. Closed-cell technology makes the siding water resistant. For aesthetic versatility, the boards feature a natural-looking wood grain on one side and are smooth on the other side. 888.724.1160. www.microposite.com.

Microposite