The answer to 'which is better roof decking or' is that roof decking is generally considered better than roof sheathing. Roof decking, also known as roof sheathing, is the structural layer that provides the foundation for the roofing materials. It is typically made of plywood, oriented strand board (OSB), or dimensional lumber and is responsible for supporting the weight of the roof as well as transferring loads to the roof framing.
Roof decking is generally a more robust and durable option compared to roof sheathing. It is thicker, stronger, and less prone to warping or sagging over time. This makes it a better choice for supporting the weight of the roofing materials, especially in areas with heavy snowfall or high winds. Additionally, roof decking provides a more stable and secure surface for the roofing installation, reducing the risk of leaks or other issues.