Chalking

Chalking refers to the process by which a powdery residue is produced on the surface of a roofing material, such as asphalt shingles, as a result of weathering or aging. This residue is often referred to as “chalk.” Chalking occurs when the surface of the roofing material is exposed to ultraviolet radiation from the sun, causing the binding agents in the material to break down over time. As the binding agents deteriorate, the surface of the material becomes increasingly brittle and may crack or flake off, producing the powdery residue that is characteristic of chalking. Chalking can be an indication that the roofing material is reaching the end of its useful life and may require replacement or other maintenance.