Which of the following reflects the roof drain procedure?

• A. They are left car sealed open
• B. They are left open and unobstructed
• C. They are connected to the main tank
• D. They are insulated for cold weather

Answer: (A)

Roof drain procedures ensure water from rain or condensation can leave the roof without backing up or causing damage. The best practice is to keep the roof drains open and unobstructed so water can flow freely into the drainage system. When drains are left open, there’s less risk of standing water, leaks, ice formation, or adds to structural load. Sealing or closing drains would trap water on the roof, creating hazards and potential damage. Connecting the roof drains to a main tank isn’t part of the typical roof drainage path and could introduce contamination or overload issues. Insulating for cold weather isn’t about drainage function and could hide blockages that need to be addressed. So keeping the drains open and unobstructed aligns with safe, effective roof drainage.