Good morning, a helper is putting down Floor basics waterproof rigid core flooring realistic wood look. It has black rubber like padding on the bottom. I bought additional underlayment. It's going over concrete. He's telling me the underlayment isn't needed, that it will interfere with waterproofing. Walking on it, it's feels like walking on concrete. Do you all put underlayment under LVP that has some padding. Would like pros and cons. Thanks, all!

The vapor barrier is too cheap and easy not to do. Depending on time of year. And level of ground water.

It will feel like walking on a wood floor.

BRAD

Thanks everyone! No padding. Will use cushioned throw rugs.

I put some planks down that had no backing. I bought some foam underlayment and could not get the planks to snap in place.

Finally figured out the stuff I had was for laminate. I bought the right stuff and finished the project. I could have done it faster and cheaper with pre-backed planks.

They are on concrete and you can tell. The sound by a little but the feel by more.

I was doing an 8,000 square foot property for a wine owner. They were unwilling to conduct a test first. So I didn't accept the job. Everyone always says they will take the chance and it will be alright. Then get sick of the results and sue or put in a claim for my bond.

I went out and purchased a few boxes of the same flooring and put it down in a large garage. Some with 6 mil plastic over the concrete then the LVP with attached backing. This garage had spots with water seepage.

Before this wine owner did his new 8,000 home, I emailed him my findings. The "Smell", "Mold" and "Squeaking" he did not care about. Then 9 months later he had the 8,000 square feet of flooring removed. The entire house pressure washed, and a new flooring installed. He did no wait for the concrete to dry before having the second floor installed.

I showed him my pressure washing spinner with a vac pick-up. This tool cost me over a grand. His guy didn't sue a spinner, only had a 16 gallon shop vac that had to be emptied every 5 minutes.