What is the minimum thickness of roof decking if rafters are spaced 16 inches on center?

In the context of roofing, the thickness of roof decking is critical for ensuring structural integrity and durability. When rafters are spaced 16 inches on center, the minimum thickness required for the roof decking would typically be 3/8-inch plywood. This thickness provides sufficient strength to support typical loads, including snow, rain, and any additional materials applied to the roof, while also accommodating the spacing of the rafters.

Using 3/8-inch plywood offers a balance between weight, structural stability, and cost-effectiveness for roofing applications. While thicker plywood options are available and may be used in certain scenarios for added strength or to handle heavier loads, 3/8-inch is generally recognized as the minimum acceptable thickness for standard deck installations with 16-inch rafter spacing, making it an appropriate choice in residential construction. This thickness ensures that the roof decking maintains its integrity under normal conditions while also allowing for proper installation of roofing materials such as shingles or tiles.