If you’ve just installed some new tiles in your shower, then you’ll want to wait the proper amount of time before exposing the new tiles to moisture. You want to wait at least a full day or 24 hours before trying to use the shower. This will give the adhesives and tiles to dry properly into place. Although, some products have longer drying times. Also, if your tiles have been installed in an overly humid environment, or during the hotter months of the year, you may want to give additional time for the tiles and mortar and grout to cure. Of course, you should always consult the manufacturer’s instructions. If you don’t wait long enough to use the tiles, you will weaken them and they will not last as long as they should.