The lifetime of a seamless acoustic ceiling is expected to be approximately equal to a regular painted drywall ceiling. It will, however depend to a large extent on the environment in which the ceiling is installed, as well as the requirements for its finish. Most types of seamless acoustic ceilings have a matte, porous surface of acoustic plaster or acoustical coating, simply because it shall be able to lead the sound energy through the surface layer and down to the absorbing core. A matte and porous surface may need some regular maintenance and care to last longer. With regular maintenance, you can prolong the time that the ceiling will remain attractive and, above all, if you install a ceiling that can be repaired without any visible signs of alteration, you will definitely have a ceiling that will last longer.