What factors can cause sheathing issues?

Sheathing issues can arise from structural factors, and one key factor is having rafters set too far apart. When rafters are spaced beyond the recommended distance, it creates insufficient support for the sheathing material. This can lead to sagging or cracking of the sheathing, and may ultimately jeopardize the integrity of the entire roofing system.

Sheathing needs adequate support to handle the load from both the roofing materials and any environmental stresses, such as snow or ice accumulation. When rafters are spaced too far apart, there is an increased risk of sheathing deflection and failure under normal conditions. This structural inadequacy can result in a host of problems, including leaks and decreased energy efficiency.

The other factors listed, while potentially impactful in different contexts, do not directly relate to the supportive role of rafters in maintaining sheathing integrity.