Hi and welcome to the forum.
If your slide outs have rollers you're in better shape than if they only had the "skids" which ride over the floor. Make SURE that your new floor sits no higher than your old carpeting. Hopefully the rollers will slide easily over the new tile but some have had troubles with a bit of scratching and have begun placing some sort of buffer strip down on the floor when retracting the slides to protect the tile.
BTW, it will help you get better responses to questions if you add the make, model, and year of your rig in your signature line. You can do this via your User Control Panel.
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD