The most common method of attaching concrete and clay tile to roof decks is?

Mechanical fastening systems are the most common method for attaching concrete and clay tiles to roof decks due to their reliability and effectiveness. This technique typically involves the use of fasteners such as screws or clips that securely anchor the tiles to the underlying roof structure. Mechanical fasteners provide strong resistance against wind uplift and other external forces, ensuring that the tiles remain securely in place over time.

This method is especially favored in roofing applications because it allows for easier installation and adjustments if necessary. Furthermore, mechanical fastening is compatible with a variety of roof deck materials, making it a versatile choice in different construction scenarios.

In contrast, adhesive bonding, while sometimes used in certain applications, does not offer the same level of mechanical strength required for roof installations where significant wind loads may be present. Gravity fastening is not typically used for securing tiles, as it relies on weight rather than a reliable fastening method. Structural welding is more relevant to metal components rather than tiling applications and is not a common practice for attaching tiles.