You've put a lot of blood, sweat and tears into your do-it-yourself kitchen update, and it's almost ready for the grand unveiling. Your new tile floor and slick, new kitchen appliances are almost ready to go but rushing things at the end of the project -- like installing your refrigerator before the floor tile has time to dry -- could risk a lot of your hard work.
Time to Cure
Thinset manufacturers require 24 hours for thinset to "cure" or dry properly. As a general rule of thumb, allow 48 hours to pass before placing a heavy object, such as a refrigerator, on fresh tile.
Both extreme hot and cold temperatures adversely affect thinset's curing process. Thinset manufacturers note that the ideal curing temperature for thinset is between 50 and 100 degrees Fahrenheit. Cold weather prolongs curing time and extends the time you'll need to wait before placing your refrigerator on the tile.
Speeding Things Up
Tile thinset mortar manufacturers make rapid-setting thinsets that take several hours -- not a day or more -- to fully dry. If you use a rapid-set thinset, you can theoretically place a refrigerator soon after completing the tile floor. Fresh grout, however, also disallows placing your refrigerator on the tile too soon.