Fiberglass-backed and felt-backed roofing shingle wastes from manufacturing were introduced into dense-graded and stone-mastic asphalt mixtures. The common materials used in roofing and hot-mix applications such as asphalt, fine aggregate, and mineral filler suggest compatibility. It is hypothesized that possible improvements in the tensile characteristics of asphalt pavement mixtures might result from the fibers used in the roofing materials. Initially, three levels of roofing waste percentages were evaluated in each mixture type along with two grades of asphalt cement. The fiberglass shingles proved to be more susceptible to changes in asphalt content than the felt. As the percentage of roofing waste increased, the compactibility of the mixtures was increased. Resilient modulus and splitting tensile strength data further illustrate the differences between the modified mixtures and the control materials.