The answer to 'lifespan of roof decking' is that the average lifespan of roof decking is 30-50 years, depending on the materials used and the climate conditions. Roof decking, also known as roof sheathing, is the structural layer that supports the roof's outer covering, such as shingles or tiles. It is typically made of plywood, oriented strand board (OSB), or solid wood boards.
The lifespan of roof decking can be affected by factors such as moisture exposure, temperature extremes, and the quality of the original installation. Properly installed and maintained roof decking can last for decades, while decking that is subject to water damage or other environmental stresses may have a shorter lifespan.