Adding new engineered board to ripped end
I installed a floating engineered floor several years ago in the kitchen and like a moron didn’t continue it under the dishwasher (I did under the oven). When we replaced the dishwasher, it did not come out the same distance and there is a ~1” x 24” area without the floor (vinyl on concrete slab there). I have extra engineered flooring and have cut it to length. The board next to the dishwasher was ripped to fit, so it does not have a tongue nor groove. What suggestions are there to install this additional piece of flooring. Note: ~1” will be visible, and ~ 3” will be under the dishwasher, so that the dishwasher will set on the flooring.
Initial thoughts (in order of how much I like them):
1) try to install a spline in the current floor to attach the new board too. However, the flooring is only 5/16” thick, and most of that would be the plywood. I’m not sure how to install the spline without splitting the plywood of the flooring.
2) Use liquid nails to glue the new floor to the slab, but not really attached it to the old floor. Probably result in gap between the two though.
3) Use the weight of the feet of the dishwasher to hold the new board in place and not attach it to anything.
Any suggestions on the best way to accomplish this.