Clay roofing is one of the oldest commercial types of roofing. It has been around for centuries and the roofs that have clay tiles last for a very long time. This is one of the reasons why it is a good roofing material. It can stand up against the wear and tear of the elements for many years. Some of the clay roofs that you see today can be as old as 100 years or more. The problem, if you are considering installing a clay roof, is that your existing roof is going to be a lot lighter than a clay roof would be. It could be necessary to install additional support to handle the added weight. Clay roofing can also be on the expensive side, so even without the need for extra support, you are looking at a substantial investment, but if you are planning on staying in your home for a long time, it will last until you are old.