I'm not sure about today's units, but if it is like the '04, there is no adjustment for the slideout height. There is a hard plastic ridge at the edgo of the main floor that the slideout rides on that lifts it off the main floor. However, once the slideout is more than 50% retracted, it tilts down and that is when the front edge of the slideout will drag on the carpet or other flooring. In most cases, once the slideout is fully closed, the slideout floor will be again raised above the main floor.
If you do use laminate flooring, the thinner stuff will be less likely to have a problem. I replaced the carpet in mine several yrs ago with 1/8 inch thick vinyl all the way to the black plastic ridge. The slideout clears the main floor during closure but barely touches for about the last 12 inches from full retraction.
There are also carpet protector strips that I think Camco makes that would probably protect the laminate from getting scratched.
Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
11 Cruiser CF32MK