The answer to 'signs of roof decking damage' is that the most common signs include sagging, soft spots, or visible damage to the roof's underlying structure. The roof decking, typically made of plywood or oriented strand board (OSB), can become damaged due to water intrusion, rot, or structural issues.
Some key signs to look for include uneven or sagging areas in the roof, soft or spongy spots when walking on the roof, and visible cracks, holes, or deterioration in the decking material. Discoloration, mold, or mildew growth can also indicate moisture problems and potential decking damage.