This substantial deck was built using the wrong hardware and the wrong materials and despite its over-sized lumber, has begun to fall apart after only 10 years. We raised the sagging portion of the deck by over 3″ and are installing four new piers and four new posts. The entire deck will have to be replaced sometime in the next five years or so, for now, this patch will keep it going. These sorts of things are easily avoidable by building things right the first time. We estimate that our decks will last over 50 years.