What is the minimum side lap required for wood shakes between joints in adjacent courses?

The minimum side lap required for wood shakes between joints in adjacent courses is 1.5 inches. This requirement is based on ensuring proper weather resistance and preventing water infiltration between the shakes. Adequate side lap helps to direct water runoff away from the underlying structure and reduces the risk of leaks and moisture-related issues.

In this context, if the side lap is insufficient, it can lead to gaps that allow water to penetrate, compromising the integrity of the roof system and potentially leading to damage over time. Therefore, adhering to the 1.5-inch requirement is crucial for maintaining effective roofing performance and longevity.