The Danville, Illinois, greenfield plant was built in 2000-2001.
Years ago, shingles were made out of organic felt material — basically rags and cardboard. In colder climates, paper-based shingles were used. About 40 years ago, the technology was introduced to make the basis of a roof shingle out of fiberglass. Fiberglass-based shingles have extended life span and are more fire resistant. Paper-based shingles are still used in some colder climates but are being transformed to fiberglass with improved technology.