For roof drains, which action aligns with the given instruction?

• A. They are left car sealed open
• B. They are regularly sealing closed
• C. They are removed for winter
• D. They are vented to the atmosphere

Answer: (A)

Roof drains must be kept unobstructed so water can flow away and air can escape as needed. Leaving the drain open (not sealed) provides a clear path for rainwater to enter the drainage system and prevents pressure buildup or backflow on the roof. Sealing the drain would trap water and air, increasing the risk of leaks or ice blockage. Removing the drain for winter or venting it to the atmosphere isn’t the intended practice for maintaining proper roof drainage.