Porcelain pavers are a visual and color longevity upgrade to interlocking concrete pavers, with some installs competing with other deck materials and looking like wood. They are usually about three quarters of an inch thick, very hard, resistant to stains, and absorb very little oil nor other liquids. They do not interlock the way that concrete pavers do so they may require more maintenance and may require special jointing material as well as more expertise to install well. They are also more susceptible to ground movement, and install methodologies continue to be innovated. Some porcelain pavers near one and a half inches thick claim to be usable to be driven on by cars.