Huber has added an R-9 thickness to its Zip System R-sheathing, a line of panels with a layer of polyisocyanurate foam. The new thickness lets builders satisfy the 2015 International Energy Conservation Code’s continuous-foam-insulation requirements in areas where Huber’s existing R-3 and R-6 panels aren’t thick enough, and where the builder doesn’t want to use the R-12 version. Material costs range from a few dollars more to twice that of a wall assembly with OSB, housewrap, and rigid foam, but installation is faster. Huber Engineered Woods,