How many rungs should a ladder extend above the roof line?

A ladder should extend 3-5 rungs above the roof line to provide secure access and ensure stability as you transition on or off the roof. This extra height allows the climber to maintain a safe grip on the ladder while pulling themselves up or down.

Extending too few rungs above the roof may lead to a lack of support and increase the risk of slips or falls. Additionally, if the ladder is extended excessively high, it can become difficult to manage and poses its own safety risks. It's important to reach a length that balances safety, accessibility, and control when using the ladder in scenarios such as accessing roofs or performing work at height.