Walls – How to deal with non square walls when installing a countertop with backsplash

kitchen-counterswalls

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.

Left Corner

Right Corner

Front view of kitchenette

Best Answer

If you are installing a tile backsplash, just sort the issue out on the tile substrate. Depending where you want the tile surface, either overlay backerboard and shim to correct the gaps, or rip out the current wall surface and replace with backerboard, shimmed to correct the gap once the tile is installed (which may mean an even gap before the tile is installed, again depending how you intend for it to look.)

It's a small area, should not be too difficult/lengthy a process.

Counter looks a wee bit high going by the window opening...if that's an egress window you may fail inspection for partially blocking it.