A roof plane is a sloping surface of a roof that is defined by its angle and direction. A roof plane is typically formed by a series of rafters or trusses that create a sloping surface from the ridge or peak of the roof down to the eaves.
Roof planes can take a variety of forms, depending on the specific design and configuration of the roof. They can be steep or shallow, and can slope in different directions, such as north-south or east-west.
The angle of a roof plane is typically referred to as the pitch or slope of the roof. The pitch is defined as the rise of the roof plane per unit of horizontal run, and is typically expressed as a ratio, such as 4/12 or 6/12. The pitch of the roof can affect the performance of the roof, as well as its appearance and the types of roofing materials that can be used.
Proper design and installation of roof planes is critical to ensuring the long-term durability and performance of the roof. The roof planes must be properly supported and braced to withstand the weight of the roofing materials and any external forces, such as wind and snow. Proper ventilation and insulation must also be provided to prevent moisture buildup and promote energy efficiency.