What is the primary purpose of a pitch pocket?

A pitch pocket is specifically designed to accommodate and flash around irregularly shaped roof penetrations. These penetrations can be anything from plumbing stacks to HVAC units or other venting systems that do not conform to standard shapes. The primary function of a pitch pocket is to create a waterproof barrier around these irregularities, preventing water from infiltrating the roof structure.

Unlike standard flashing systems that suit regular-shaped penetrations, pitch pockets feature a reservoir that holds sealant or roofing cement, which helps ensure a watertight seal as it conforms to the unique shapes around the penetrations. This functionality is essential in maintaining the overall integrity of a roofing system, particularly in areas where leaks are more likely to occur due to the complex interactions of different materials and shapes.

In contrast, the other options either oversimplify the purpose of pitch pockets by suggesting they deal with regular shapes or imply that their function is primarily decorative, which does not accurately reflect their critical role in roofing systems.