What is the minimum size for no-caulking roof flashing approved by the KY State Plumbing code?

The minimum size for no-caulking roof flashing approved by the Kentucky State Plumbing Code is 18x18 inches. This size is specified to ensure effective water management and prevent water intrusion at the intersections of roofing and plumbing systems. Properly sized flashing is crucial as it deflects water away from vulnerable areas of the roof and plumbing fixtures, reducing the risk of leaks and subsequent water damage. An 18x18 size is considered adequate to cover the area necessary to achieve these protective measures, balancing effectiveness with practical installation considerations. Other sizes, while they may provide more coverage or be applicable under specific conditions, do not meet the minimum requirement established by the code for standard installations.