We have popcorn ceilings that we wanted to cover. We used styrene in some rooms at first. It was lightweight and easy to work with, but caulking all the seams were a pain. We read these pvc panels couldn't be used for glue up. We tried anyway because other brands said it could. You just need the right type of contractor glue. We tried Loctite first, but the pvc was too heavy. Then we tried gorilla glue contractor adhesive. It held perfectly. It was more expensive but used less glue than we did for the styrene. We overlapped the tile edges so there were no seams and no caulking. The ceilings have turned out beautifully. I would recommend this product.