This depends on what type of flooring solution you have. You can use flooring without adhesive, such as peel and stick tiles, straightaway. It takes a day or so before you can use a new hardwood floor without causing damage. Depending on the brand, tile adhesive and grout take between three days and one week to cure. You'll need to let this period pass before using a traditionally tiled floor. Once this time period passes, you can move your furniture back into place and start walking on your new floor. If you've laid traditional tiles, you can also clean off excess grout after this time.