I did the bunks on my fishboat a couple years ago. You need to remove the old carpet. It wasn't hard to do, most of the staples come out when you give a big pull on the carpet. The rest came out with needle nose pliers. I did it in one afternoon at the lake. Changed my fenders and rollers at the same time. I bought the carpet at Home Depot they advertise for use in boats. Holding up well.