Just a stray dishwasher installation thought. These puppies will vent some heat/steam and it goes upwards. I got some advice early on that when installing a diswasher, if you can put a couple of coats of some type of moisture barrier on the bottom side of the counter (assuming it is wood, pressboard, MDX, etc) before putting the dishwasher in there, it will save some aggravation later on with that material absorbing the moisture and getting all funky. Might be helpful.