Trying to do all the lengths together caused it to whip around a lot and I was only using an 1800 psi washer. I tried just 2 or 3 lengths with a 6 ft. step ladder and was able to reach the peaks of my house (about 15'). After I was finished I decided to experiment by adding a few more lengths, one at a time, and found I was able to use 5 or 6 lengths and still manage it quite well, which almost gets me up to the full height that I need. I am glad I ordered it.