The answer to 'how much does roof decking cost' is that the cost of roof decking can vary significantly depending on several factors. Roof decking is the foundation of your roof, and its cost is influenced by the size of your roof, the type of material used, and your location.
In general, you can expect to pay anywhere from $2 to $5 per square foot for basic plywood or oriented strand board (OSB) roof decking. More premium materials like tongue-and-groove wood planks or concrete roof decking can cost $5 to $15 per square foot. The total cost for your roof decking will depend on the total square footage of your roof. It's important to get quotes from local roofing contractors to get an accurate estimate for your specific project.