The floating floor Marmoleum Click can be easily installed over an existing vinyl or old style linoleum floor. It is always a good idea to check if the existing floor is leveled, though. In fact in my home, I left the old vinyl in Master Bath just like it was because that forms an additional moisture barrier under the new floor. Since we had removed the carpet from adjacent Master Bed though, there was a slight level difference in the doorway between the two. I used a layer of underlayment in the Bed to make it at the same level as the Bath. This helped me in running the surround sound cables under floor too.
Get started soon so you can finish your project before Fall!