The tape actually holds going up the sides also. What i did with the tape is I outlined all of the edges of the main floor. put an X across the floor from one corner to the other. then i ran a strip down the middle of the of the gunnel under the gunnel side storage. Then I took a heavy roller and rolled it down each piece of tape after the carpet was laid down. It took quite a bit of effort to pull it up. I will be putting down that tape again this week, I will post some pictures before I lay down the carpet.