As much as you want to cut down costs on a new floor this is not the way to do it.
Can you install vinyl flooring over carpet padding.
Carpet removal from house of humble blog.
Has any of you heard of putting vinyl plank flooring on top of the carpet padding.
Installing laminate flooring over carpet underlayment will do more harm than good in the long run.
Just like ceramic tile linoleum needs to be installed on a flat surface that will bond with the adhesive used in installation such as plywood or cement but not carpet or carpet padding.
You absolutely cannot use carpet underlayment underneath laminate flooring.
I thought it strange but he said that he worked on an apartment complex and they did just that on about 10 units.