I am converting the huge upstairs master suite in my house into a studio apartment. I have built a kitchenette in one of the dormers. Everything is coming along and looks great. But when the counter was dry fitted into place, we realized the corners of the dormer were not square. The counter is flush against the window but is 5/8" off the wall at each corner. I had planned on installing a subway and mosaic tile back splash but don't know how to deal with the gap. I love the way it has turned out but all the wind has been knocked out of my sails with this problem.