The answer to 'roof decking vs' is that roof decking and roofing are two distinct but related components of a home's roofing system. Roof decking, also known as sheathing, is the structural layer that provides the foundation for the roofing material. It is typically made of plywood, oriented strand board (OSB), or dimensional lumber and is installed directly over the home's roof framing. Roofing, on the other hand, is the outermost layer of the roof system, which includes the shingles, tiles, or other materials that protect the home from the elements.
The primary difference between roof decking and roofing is their function and purpose. Roof decking is responsible for providing a stable, flat surface for the roofing material to be installed on, while roofing is responsible for shedding water, protecting the home from the weather, and enhancing the overall aesthetic of the roof. The choice between different types of roof decking and roofing materials will depend on factors such as the home's architectural style, the local climate, and the homeowner's budget and preferences.