However, concrete roof tiles can last for more than fifty years, while metal roofing has a maximum estimated lifespan of around seven decades. Terracotta roof tiles are even more durable, with many of them surpassing the century barrier, as long as they are properly maintained. The issue? Many of them aren’t.
https://www.articletrunk.com/terracotta-roof-tiles-a-great-long-term-purchase/