One other good reason for using pads under the jacks; camping in freezing weather. I have had the misfortune to be camped in our son's yard when there was winter weather and we needed to leave before there was a thaw. My jacks were frozen to the ground and it took some serious prying to break them loose. The next time we setup where there was the possibility of precipitation and freeze I used my pads. At departure time everything was frozen but the jacks lifted cleanly from the plastic pads! I pulled the coach clear and was able to use a pry bar to free the pads in a matter of seconds. It wouldn't have taken minutes because I would have gone without them.