What is the minimum distance a ladder should extend above the roof?

A ladder should extend a minimum distance of 36 inches above the roofline to provide adequate safety and stability for individuals transitioning from the ladder to the roof. Extending the ladder this distance ensures that there is sufficient space for climbers to grasp the roof's edge securely while maintaining their balance as they step onto the roof. This height also helps to prevent falls, as it reduces the risk of slipping or losing grip during the transition. A properly extended ladder allows for safer access and enhances overall safety during roofing tasks. Therefore, 36 inches is the standard practice in ladder safety guidelines to promote worker safety.