What is the minimum overlap for 2 and 3 speed doors?

In the context of two and three-speed doors, the minimum overlap is critical for ensuring that the doors function correctly when they are closed. Overlap refers to the amount by which one door covers another when closed, which is essential for preventing gaps that could compromise insulation, security, or overall functionality.

The standard minimum overlap for these types of doors is typically set at 5/8". This amount is sufficient to ensure a proper seal between the closed doors, which prevents air leakage, increases energy efficiency, and helps maintain the integrity of the area being enclosed. If the overlap were any less than this, it could result in inadequate sealing, leading to various operational issues.

Therefore, the correct answer reflects the industry standard designed to provide optimal performance in terms of sealing and usability for two and three-speed doors.