What is the minimum drip offset for flashing?

What is the minimum drip offset for flashing?

• A. 5 mm
• B. 1 cm
• C. 10 mm
• D. 0 mm

Answer: (A)

Water management with flashing relies on a tiny lip that makes water drip away rather than cling to the edge. That drip offset creates a small vertical projection so capillary action doesn’t pull moisture back into the joint and onto the wall or sealant. A minimum offset of five millimeters provides enough clearance for droplets to shed cleanly and reduces the chance of moisture wicking behind the flashing. Smaller offsets can fail to break the capillary path, while larger offsets aren’t necessary as a minimum. So, five millimeters is the standard minimum to ensure effective drainage and durability.

Water management with flashing relies on a tiny lip that makes water drip away rather than cling to the edge. That drip offset creates a small vertical projection so capillary action doesn’t pull moisture back into the joint and onto the wall or sealant. A minimum offset of five millimeters provides enough clearance for droplets to shed cleanly and reduces the chance of moisture wicking behind the flashing. Smaller offsets can fail to break the capillary path, while larger offsets aren’t necessary as a minimum. So, five millimeters is the standard minimum to ensure effective drainage and durability.