@gunrunnerjohn posted:I did notice some slight variation in thickness, but no more that about 1/16". I got all 12 sheets of mine from the same pallet at HD, only rejecting pieces that were damaged in handling. They even cracked a new bundle for me since they only had a few mothy sheets that weren't bundled. Overall, I'm very happy with the Homasote base, and a bonus is it holds the track screws very well. As long as you don't screw into the plywood under it, no issue with noise transmission.
Same here, I too had them open a new bundle. I only needed 4 sheets, the ones that were loose were all banged up. yes it holds track screws very well and cuts down on the noise.