Check out the lightweight ceiling boards from Duramax:

Duramax PVC panels are ideal for commercial wall and ceiling cladding. Made from 100% virgin vinyl, they are exceptionally durable and long-lasting. These lightweight ceiling boards from Duramax are easy to install. They are ½” thick and do not need backer boards for installation. They directly fit the ceilings with studs and fasteners. They interlock with the tongue and groove mechanism, making the installation easy and fast. These panels are sturdy and have minimal maintenance requirements. They do not crack or peel off and have a shelf life of 100 years. Shop from Duramax for a limited lifetime warranty. Request a free sample now!