What can I do about flooring height differences when installing laminate flooring?
There are two ways to install flooring in areas of different heights. The cheapest and easiest method is to install transition pieces or thresholds between the areas of different heights. These transitions are available in different matching shapes and heights for most laminates. Common use is to join carpeted, tiled or other floors, to new flooring height.

The second method is to install new sub=flooring of a correct thickness over lower floors to make all the floors match in height. This is a bit more expensive and will add a day or so to your labor costs, and possibility require some extra trim work. Having all the floors at the same level will make for a nicer looking install, especially between larger rooms with wider passages.