Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Do we need additional moisture barrier with this to put it over concrete? Or does it cover the moisture needs by itself?
Document: I would recommend this product to anyone needing padding and a water vapor for laminate flooring. I used this in a basement to cover the concrete flooring on the cheap and it has made the flooring reasonable to walk on versus the laminate directly on the concrete.
I got this thinking it would be softer than using cork. When waling on my bamboo floors, it almost feels like carpet as the floor "give' alittle. Maybe it is an aspect of having floating floors but it feels very nice. Installation / usage is a breeze but get a goos pair of scissors to cut.I applied over concrete floors but my floors are a bit uneven in some places and here is where you may have an issue.
Better than the cheap stuff. Not as dense as the expensive stuff. I used one of these rolls along with one of the 100 square foot rolls. The smaller roll was not as wide as this one and would take more passes to cover a given width room. I liked the extra width because it was faster to lay out.
bought in the 360' rolls because it comes 5' wide instead of 4'. laid 720' of it ,it rolls out very flat and stays put ,your feet won't mess it up. only thing i was it cuts hard. i did run a little short so i saw that lowes had what looked like the same product,but it wasn't even close.lowes was almost a cardboard feel compared to roberts. i will use roberts  again without a doubt
One roll did our two bedrooms perfectly. I put the felt down and then the engineered wood (snap-lock flooring) and it looks and feels great. Then yesterday when I started to throw out the center carboard tube I was surprised to see a bunch of mold on one end and of course that strong mildew smell. OH NO!!! It appears that the roll was standing upright in the warehouse (or somewhere) and got wet as the mold and water damage is concentrated on one end.
Worked great for my floors, easy to use this product , delivery was fast, saved me a few bucks getting felt at amazon. This is my second rol and no problems at all.
This is the only 4 mm thick underlayment that I found. With the pre-taped seem and overlay &#34;skirt&#34; on the abutting edge, installation time is very fast.
This is a very nice product to work with and feels great under your feet.I have used other brands and this one is much better.
My roll came and was perfectly dry with no smells, significantly easier to lay down in the room with the extra width of the roll.
It is very high quality of underlayment. It is cheaper and better than ones sold in Home Depot or Lowe.
Answer: no