Heritage Architectural Shingles are a classic in the roofing industry, recommended by contractors, builders and homeowners for their quality construction, Limited Lifetime Warranty, beautiful woodshake cut and the best shingle colors available in the market. Heritage shingles have a double-layer fiberglass mat construction with a random-cut sawtooth design. The 2 layers of mat are coated with asphalt, surfaced with mineral granules and then laminated together. They also include a self-sealing strip of asphalt.