GAF has a new environmentally friendly insulated sheathing. It’s made from blowing agents that don’t contain CFCs or HCFCs—chemical compounds. The 4-foot-high-by-8-foot-wide boards are available in ½-inch, ¾-inch, 1-inch, and 2-inch thicknesses. They can be used in applications such as cavity, masonry, and stud walls, as well as exterior stucco. GAF, 973.628.3000,