Architectural shingles: These do not have cutouts and will contain further asphalt. Water-proof but not recommended for flat roofs. Now, asphalt shingles are fashioned by coating a fiberglass reinforcement mat with the asphalt-centered combination and embedding a protective layer of ceramic-coated mineral granules on the highest aspect in the shingle https://ClassifiedsLink.com/588/posts/3/125/2067805.html