What is the minimum headlap required for slate shingles on a 10:12 roof slope?

The minimum headlap required for slate shingles on a roof slope of 10:12 is based on the need for proper water shedding and preventing leaks. The slope of 10:12 indicates a steep roof, which typically requires a specific amount of headlap to ensure that the shingles overlay adequately to direct water away from the roofing system.

For slate shingles, the headlap is crucial because it dictates how much of the slate is exposed to the weather and how much is covered. A headlap of 5.7 inches is established as a standard for this slope in compliance with building codes and best practices in roofing. It effectively allows for efficient water runoff without risking the integrity of the roofing system.

This dimension reflects a balance between performance and aesthetics, ensuring that water can effectively drain while providing the necessary overlap between the slates to minimize any potential leaks or water ingress.