Garage under tiles
I am very happy with the purchased of tiles as well as underlayment. I was pleasantly surprised by the low amount of noise being transmitted by the flooring. I put the underlayment first and then installed the floating tiles for my garage. Impressed with the shine and the performance (sound insulation). Whole process took about 8-10 hours (underlayment+Flooring) including the time for cutting the tiles. I did this for the first time and my skill level is minimal. overall I was happy that I was able to do this in 10 hrs. It was a satisfying purchase with not much wastage in material. I went with the material amount suggested by you and was left with about 20 sqft of flooring left which I might need just in case of any repair work. Friendly staff on time delivery made the experience better. I am attaching a few pics of my garage installation.