Manufactured with 95% recycled/reclaimed materials, including post-industrial plastics and crumb rubber from tires, Enviroshake composite engineered roofing will not rot, warp, crack, or blister and is resistant to hail, mold, mildew, and insects, says the firm. The shakes, which replicate the look of silvered taper-split cedar, can be installed on plywood or strapping as well as over an existing layer of asphalt shingles. The product can be walked on. 866.423.3302. www.enviroshake.com