Area Turf Bubbles/Rolls

[hardrain]

Hey all - I am starting to convert my hitting net in my garage into a full simulator. I recently put down about 10'x15' feet of "Pro Putt" artificial turf: https://static.mywebsites360.com/b72...Pro%20Putt.pdf

It is just laying down on my garage floor, not attached at all. My question is - it has some rolls or bubbles in the middle of it that I can't get to lay flat. It is frustrating as I would like to putt on it or lay some other putting matt on top. It isn't fun to put when there are unintentional breaks! I have tried to lay some heavy lumber and stuff on it and let it sit but the rolls come back when I take the lumber up. Any idea on how to get this thing flat?

I have attached a picture but not sure it will show well.

[mtduffer]

I'm new here and just scrolling through posts of interest. Seems there are lots of single posts that get no responses. Hmmm.
I don't know if you found a solution to this already, but a possible fix is to rent a small lawn roller or steel carpet roller, roll the carpet back to before the bumps and ridges, put down some double sided carpet tape, then roll it back out and follow with the heavy roller.