Does subway tile need spacers?
Yes, you should use spacers to install a subway tile backsplash. Spacers will make it easy to keep the lines between your tiles equal, and skipping this step can make your finished product look cheap and rushed. Remember to place a spacer between the last row of your subway tile backsplash and your countertop or ledger board.
If you don't have experience installing subway tiles, consider hiring a tiling contractor instead.