quieting a dishwasher even more than the factory?
I have used the foil-backed insulation material sold at Auto Supply stores, which is designed to quieten/sound proof automobiles during restoration. I don't use the sticky-backed stuff, just the roll material, and use duct tape to hold it in place. This stuff is not really cheap, but is very efficient for use on a dish washer. IF you are only concerned with the lower plate, this may not be an option. IF you might want to add this material to your existing material on your dishwasher, then the cost would be worth it. Keep in mind it will add height and width to your unit, and placing it back into the recess will be more difficult. A piece of cardboard between the cabinet edges and this material seems to help slide it in. Once it is back in, there has always been enough room for this extra material. AND-it works very good. Just a thought to help, Good Luck, David