What feature is common to interlocking tiles used in roofing?

Interlocking tiles used in roofing typically feature a coverlock and underlock design. This characteristic is significant because it enhances the interlocking capability of the tiles, ensuring that they fit together securely and resist wind uplift. The underlock component helps to create a waterproof barrier, reducing the risk of leaks by channeling water away from the seams where the tiles connect. This interlocking design not only contributes to the overall durability and performance of the roof but also allows for easier installation, as the tiles can be laid in a systematic manner.

The other options, while they may apply to some roofing materials, do not define the unique interlocking feature that is explicitly associated with interlocking tiles. Self-sealing pertains more to materials that have adhesives that activate when heated, glazed surfaces refer to a finish that may not directly impact the interlocking capability, and a textured finish can vary widely among different types of tiles but is not a defining feature of interlocking roofing tiles specifically.