The answer to 'roof decking worn out' is that the roof decking, which is the underlying structure that supports the roof, has become worn out or damaged over time. This can be caused by factors like water damage, rot, termite infestation, or simply old age and wear and tear.
Some common symptoms of worn-out roof decking include sagging or uneven areas on the roof, visible cracks or holes, and even leaks or water damage inside the home. If left unaddressed, a worn-out roof decking can compromise the structural integrity of the entire roof, leading to more serious problems down the line.