Can You Double Up Carpet Underlay

A good 1 2 inch.
Can you double up carpet underlay. I want to put a flowting floor on my basement cement floor my problems are 1 the cement floor has a drain in it so the floor slopes towards the drain. I have a problem im hoping you can have a solution for. I presently have a plastic mesh type of flooring with a carpet on top. I agree with rob s don t use two layers of underlay but not because the carpet backing would break down.
Im stumped on how to put a wood floor down. No you ll both void any carpet warranty and the carpet backing will break down fast where it is doubled up. If you are thinking about using two layers of underlayment to raise the subfloor height you can use one layer of the glued cork plus the laminate. Installing laminate flooring floor one.
The main problem is that it would be hard to fit. Pergo installation essentials guide for laminate flooring. This underlay type is often one of the top choices for commercial installations due to it s tough hardwearing nature. Having the pad rub against it self will break the padding down faster.
Even if you use 2 layers of 3 8 pad. Flooring underlayment types and uses pergo. References find any floor.