Can I install vinyl flooring over existing laminate flooring?

You can glue a vinyl to it if it’s in good shape. Scuff it up first. Never install a floating floor over an existing floating floor, though

There are no short simple answers to most of the questions here. The answer is: Depends! If you want a good and warrant-able job done you should NEVER install anything on top of a FLOATING floor. Laminate IS a floating floor. Period. Having written the above, physically you can do whatever you want. It is all about your expectations and frankly your budget. NO professional should ever do this for you at any price, but if this is what you want and don't care about the possible future consequences, it can be done, but not only by having it glued down as I read in another answer here, but floating it as well. at the very least in a perpendicular direction (90 degrees to the direction of the current flooring). Again, NO professional should take money for this and do it, but physically it is possible. Why not. If you come into our store and ask us to do this for you we would respectfully decline at any price. We would never put our name and reputation behind something like this.