Which roofing material type is described as sold in bundles?

The roofing material that is typically sold in bundles is composition shingles. Composition shingles, also known as asphalt shingles, are primarily made from a fibrous mat that is coated with asphalt and then covered with granules for protection and color. They are designed in a way that allows them to be easily bundled for shipping and handling, making them accessible and convenient for both homeowners and roofing contractors.

Each bundle usually covers a specific area, typically around 33 square feet, which helps in estimating the total number of bundles needed for a roofing project based on the square footage of the roof. This bundling not only simplifies transportation but also facilitates easier storage and purchasing for consumers.

In contrast, slate shingles and metal shingles are often sold in different formats, such as individually or by weight, rather than in bundles, and may not be as straightforward for counting and estimating roof coverage.