What should be the characteristics of the intersecting roof surfaces at hips and ridges?

The characteristics of the intersecting roof surfaces at hips and ridges are crucial for ensuring proper water drainage and preventing leaks. The correct answer highlights that these areas should be capped, which serves both a functional and aesthetic purpose. Caps can be either site-made or factory-made, providing flexibility in roofing design and application.

Capping the hips and ridges helps to create a weather-tight seal, directing water runoff safely off the roof and preventing the penetration of moisture into the structure. This design consideration is particularly important in various climates, including Oklahoma, where heavy rains or storms can create a risk of water damage if not properly addressed.

The other options, while they may contain some elements that are relevant to roofing, do not correctly describe the specific characteristics needed at hips and ridges. For example, reinforcement with metal might be beneficial in certain roof applications but is not a standard requirement for capping. Painting roofs is not a necessary characteristic at these intersections, and while synthetic materials can be used in roofing, they are not exclusively required for hips and ridges. Thus, focusing on the capping aspect captures the key requirement for ensuring effective roofing performance in these areas.