What type of flashing should be installed to reduce water infiltration beneath a seal?

Pan flashing is specifically designed to capture and redirect water away from areas that are prone to leaks, particularly beneath seals or joints where water infiltration can occur. It acts as a barrier that collects any water that may seep through and channels it to drainage points, preventing it from infiltrating underlying structures. This makes it particularly effective in scenarios where water could accumulate around seals, as it prevents structural damage and moisture buildup.

The other types of flashing serve different functions. For instance, top flashing is typically used to divert water away from the top edge of a structure, while side flashing is more about directing water that runs down the sides of walls or joints. Bow flashing, on the other hand, doesn't specifically target water infiltration beneath seals but rather assists in managing water flow in a more general sense. Thus, pan flashing is the most appropriate choice for effectively reducing water infiltration in the context described.