What is the primary function of knee walls?

The primary function of knee walls is to transfer loads to ceiling joists and walls. Knee walls are short walls typically found in spaces where a roof slopes, such as in attics. They are crucial in supporting the roof structure and helping to distribute the weight and any lateral forces acting upon the roof to the structural elements of the building. By connecting to both ceiling joists and the main walls of the structure, knee walls help maintain the integrity of the roof system and prevent potential structural failure.

While knee walls can indeed create usable space or contribute to the aesthetic appeal of a roof, their primary purpose is structural. Additionally, they do not typically serve the function of enhancing ventilation, as ventilation in attics usually relies on other features like vents or soffits. Understanding the role of knee walls emphasizes the importance of structural support in roofing systems.