Clay tile should be installed on a roof with a minimum slope of what ratio?

Clay tile roofing requires specific installation guidelines to ensure both performance and durability. For clay tile to function effectively, it needs to be installed on a roof with a minimum slope of 2.5:12. This ratio indicates that for every 12 horizontal units, the roof must rise at least 2.5 vertical units.

This slope is crucial because it allows for proper drainage of rainwater. Too gentle a slope could lead to water pooling, which can cause the tiles to crack or lead to leaks. A slope of 2.5:12 helps promote adequate runoff and minimizes the risk of moisture-related damage, thus enhancing the longevity of the roofing system.

In contrast, the other options offer slopes that are either too low or not within the recommended guidelines for clay tile roofing. Understanding these specifications helps ensure proper installation and performance of roofing materials.