Porcelain is one of the most durable materials available in tiles. The long-lasting PEI 4 or 5 glazing grade can last the homeowner for a lifetime with the correct installation and maintenance.
However, if you select a lower-quality tile, you may only receive 20-years of service life before they require replacement. Porcelain has excellent resistance to the elements, and you can expect them to hold up in external applications around the home, such as the patio.