Appearance varies, but typically, these tiles are 9×9 inch or 12×12 inch squares. Common colors include white, gray, beige, and brown, sometimes with mottled or swirled patterns. A distinguishing feature is their age; they were primarily installed from the 1920s through the 1980s. Often, the adhesive used to secure them is also asbestos-containing. Examining edges closely may reveal a fibrous texture.
The significance of recognizing characteristics stems from health risks associated with asbestos fiber inhalation. Disturbance of the tiles, such as during removal or renovation, can release these fibers into the air. Historical context reveals that asbestos was once widely used for its fire-resistant and durable qualities, making it a popular building material.