We believe there are many reasons for CDX to be considered a better option for roof decks, but one stands above the rest: superior fastener holding power. We tear off old roofs every day and some shingles are fastened better than others. In cases where OSB has been used for the roof deck the tear off is usually easier and faster by 30%. The shingles and fasteners usually don’t need much persuasion to be removed. If you have the time, on the pros and cons of both products.