Tamko expanded its Heritage series of laminated asphalt shingles to include a Class-4 impact-rated version designed to resist cracking and rupturing from heavy hail. The underside is reinforced with a layer of non-woven polyester fabric, which uses thermally bonded fibers to add impact resistance. The line is available in six natural colors. Tamko, www.tamko.com, 800.641.4691.