The answer to 'how long does roof decking last' is that roof decking, also known as roof sheathing, typically lasts between 20-50 years depending on the material and conditions. Plywood or OSB (oriented strand board) roof decking is the most common, and it has an average lifespan of 30-40 years when properly maintained. However, factors like climate, roof ventilation, and the quality of the original installation can impact the longevity of the roof decking.
Properly maintaining the roof and addressing any leaks or moisture issues is crucial for maximizing the lifespan of the roof decking. Homeowners should regularly inspect the roof and have a professional roofer evaluate the condition of the decking during roof replacements or major repairs. Replacing damaged or deteriorating roof decking is important to maintain the structural integrity of the roof.