The answer to 'which is better roof decking or' is that roof decking and roof sheathing are both important components of a roof, but they serve different purposes and have their own advantages. Roof decking, also known as sheathing, is the structural base that the roofing material is installed on. It provides support and stability to the roof. Roof sheathing, on the other hand, is the outer layer that covers the roof decking and protects it from the elements.
Roof decking is typically made of plywood, oriented strand board (OSB), or solid wood boards. It is installed directly on the roof trusses or rafters and provides a sturdy foundation for the roofing material. Roof sheathing, on the other hand, is usually made of plywood or OSB and is installed on top of the roof decking. It helps to distribute the weight of the roofing material and protects the decking from moisture and other environmental factors.