Asphalt shingles are made from an asphalt impregnated _________.

Asphalt shingles are primarily composed of a base layer that consists of an asphalt-impregnated mat. This mat is typically made from fiberglass or organic materials, which provides structural integrity and flexibility. The asphalt not only acts as a waterproofing agent but also helps bond the granules that are embedded in the shingle's surface, giving it both color and additional protection from the elements.

The use of a mat is crucial because it serves as a foundation for the asphalt and provides the necessary support for the shingle. The choice of materials for the mat affects the durability and performance of the asphalt shingles. For instance, fiberglass mats tend to offer better fire resistance and are generally considered superior in terms of longevity compared to organic mats, which are made from recycled paper products.

Understanding this composition is important for evaluating the quality and effectiveness of roofing materials. Other choices such as membrane, sheet, and board do not accurately describe the primary component of asphalt shingle construction, highlighting the specific role of the mat in providing a reliable roofing solution.