Pocket, Pitch

Definition

A pitch pocket is an opening between growth rings of a tree which usually contains resin, bark, or both. In roof construction, it is a metal container placed around a roof penetration at roof level to receive hot bitumen or caulking and provide a roof seal, commonly found at columns or plumbing stacks.

Purpose

In roofing, pitch pockets provide a method to seal penetrations through the roof surface, preventing water ingress around pipes, conduits, or structural elements. They ensure the integrity and waterproofing of the roof.

Examples of Use

• Roof Sealing: Used around plumbing stacks, electrical conduits, and structural columns penetrating the roof.
• Maintenance: Applied in roof repairs to seal gaps around new or existing penetrations.
• Commercial Buildings: Commonly found in commercial roofing systems to maintain waterproofing around complex roof penetrations.

Related Terms

• Roof Flashing: A material used to seal and protect joints in a building from water penetration.
• Caulking: A flexible material used to seal joints or seams against leakage.
• Bitumen: A viscous substance used for waterproofing in roofing applications.

Notes

• Maintenance: Regular inspection and maintenance are essential to ensure the effectiveness of pitch pockets and prevent leaks.
• Installation: Proper installation involves filling the pitch pocket with a suitable sealant, such as bitumen or elastomeric caulking, to ensure a long-lasting seal.