polystyrene ceiling tiles were still available for purchase. However, please note that product availability and regulations can vary over time and by location. It is advisable to check with local suppliers, home improvement stores, or online retailers to determine if polystyrene ceiling tiles are currently being sold and if they comply with any specific regulations or restrictions in your area.
It's worth mentioning that there has been a growing concern about the environmental impact of polystyrene due to its non-biodegradable nature. Many regions have started implementing restrictions or bans on certain forms of polystyrene foam to reduce environmental pollution. Therefore, it is important to stay informed about local regulations and consider alternative ceiling tile options that may be more environmentally friendly, such as mineral fiber, PVC, or metal tiles.