i lined my whole 27' trailer....up the sides about 8" also...it keeps the carbides from ruining the floor, and water doesn't seep into the floor or seams...it's kind of slick when wet, not terrible, but you have to pay attention...after traveling a while the carbides kind of indent into the lining, doesn't cut it, but if the floor is wet, the track just spins...i finally put some ez glides on the floor and ramps, works very well now....ride on and off, no problems...trailer floor and seams (wood part) stays dry...best overall setup i've had on any of my trailers (5)....