When a ladder is used to access a roof, a minimum of how many rungs should show above the roof line?

• A. Three rungs should show above the roof line
• B. Six rungs should show above the roof line
• C. Five rungs should show above the roof line
• D. One rung should show above the roof line

Answer: (C)

The safety idea here is that the ladder must extend above the roofline enough to give you a solid handhold and a stable foothold when moving from the ladder onto the roof. Having enough ladder exposed above the edge creates a clear transition zone where you can grip securely and place a foot on a rung before stepping onto the roof, helping you maintain three points of contact and control as you move. Too little exposure leaves you with insufficient grip and a cramped, awkward step, increasing the risk of slipping. Too much exposure can make the ladder harder to manage in tight spaces and may place you too far from the edge. The recommended minimum exposure provides the safest balance—enough room to grasp a rung and step onto the roof confidently, without overextending.