The Royal Collection ceiling tiles are made out of extruded polystyrene (a type of styrofoam). That material makes them even, thin and offers a smooth surface, with great natural-looking and nicely textured designs. It also allows the tiles to be cleaned easily and be water-resistant. Helps the customer to be creative by giving the tiles the finish he or she desires, with help of a roller, sprayer, or regular paintbrush and a bucket of water-based paint.