What is the purpose of roof sheathing?

Roof sheathing serves a critical role in the overall structure of a roof by providing a flat surface that covers the rafters or trusses. This sheathing acts as a base for the roofing material, ensuring that it is securely attached and provides a smooth, uniform surface for the shingles or other roofing products. Additionally, it helps to distribute the load placed on the roof evenly across the rafters or trusses, which is essential for maintaining the structural integrity of the building.

While elements like insulation, aesthetics, and siding may play important roles in a roofing system, they do not define the primary function of roof sheathing. Roof sheathing’s direct connection to the structural components of the roof is what makes it indispensable in roofing construction and repair.