CertainTeed. The company has added three new colors—flagstone, hearthstone, and spruce—to its MainStreet vinyl siding line, bringing the collection's palette to 20. Designed to mimic classic wood-style siding, MainStreet is available in seven styles and wood-grain or brushed texture options. The product carries a Class A fire rating, features RigidForm 160 technology designed to withstand wind speeds up to 160 mph, and includes STUDfinder installation guides. 800.233.8990. www.certainteed.com.