This may be a odd question. But I have a 1700 shower tray made in stone cast resin with an anti slip coating. I got it early because I managed to get a good deal but it’s not going to be installed until July/August. And being so big it’s taking up a lot of space. Was considering wrapping it in big bin liner bags and placing it flat on the garden deck. But my worry is will the freezing cold weather damage the tray or delaminate the coating etc? Is it safe to leave outdoors?