The answer to 'how to repair roof decking' is to replace any damaged or rotted roof decking. Roof decking is the structural layer beneath the roofing material, and it's essential for maintaining the integrity of your roof. Over time, roof decking can become damaged due to water leaks, pests, or general wear and tear.
To repair roof decking, you'll need to remove the damaged sections and replace them with new plywood or oriented strand board (OSB) of the same thickness. Make sure to inspect the entire roof deck and replace any additional areas that are compromised. Once the new decking is in place, you can then reinstall the roofing material.