Minimum number of fasteners required for clay perimeter roof tiles?

Minimum number of fasteners required for clay perimeter roof tiles?

• A. Zero per tile
• B. One per tile
• C. Two per tile
• D. Three per tile

Answer: (B)

Perimeter clay roof tiles are held in place primarily by their edge interlock, the weight of surrounding tiles, and a single securing fastener placed at the designated nail location. This setup provides enough restraint against wind uplift while allowing for small expansions and contractions of clay tiles with temperature changes. Using one fastener per tile is the minimum needed to keep the edge tiles from lifting or slipping, given how the tiles above and to the side help lock them in. Choosing zero fasteners would leave edge tiles vulnerable to wind forces. Using two or three fasteners per perimeter tile is not required in typical installations and would add unnecessary cost and potential for cracking or misalignment without providing a meaningful benefit in the exposed edge, where a properly placed single fastener already delivers the needed restraint.

Perimeter clay roof tiles are held in place primarily by their edge interlock, the weight of surrounding tiles, and a single securing fastener placed at the designated nail location. This setup provides enough restraint against wind uplift while allowing for small expansions and contractions of clay tiles with temperature changes. Using one fastener per tile is the minimum needed to keep the edge tiles from lifting or slipping, given how the tiles above and to the side help lock them in.

Choosing zero fasteners would leave edge tiles vulnerable to wind forces. Using two or three fasteners per perimeter tile is not required in typical installations and would add unnecessary cost and potential for cracking or misalignment without providing a meaningful benefit in the exposed edge, where a properly placed single fastener already delivers the needed restraint.