Place a wooden shim under the low side of the cabinet unit, and tap it with a hammer to drive it under the cabinet. If the cabinet is low in the back, slide a wood shim between the wall and the back of the cabinet at the top of the cabinet.Click to see full answer. Besides, can you shim granite countertop?A. The countertop should not be shimmed. For granite countertops, the cabinets should be completely level across the top. Any shimming should be done at the bottom of the cabinets—not the top—so the countertop can sit on a perfectly level surface.Secondly, can you shim quartz countertops? In most cases unfortunately, the answer is no. The only thing to do as most often the countertops are not leveled is to opt for professionals that instead of installing thick shims, that over time cause pressure on the stone, will install thin ones that will do the job as well. Similarly, it is asked, how do you level a countertop? How to Level a Kitchen Counter Use the level to check that every cabinet frame is flush. Hammer in wooden shims beneath the side of the cabinet that’s too low. Place your new countertop onto the cabinet framework. Insert wooden shims beneath the edge of your countertop to raise it into the proper position. How do you use shims? How to Use Wood or Plastic Shims Gently tap the shim into the opening with a hammer. Shims are very delicate, so be careful when tapping. Make sure that you have pushed the shim in far enough, but not too far. Nail the work material in place. If using wood shims, lightly score the wood with your utility knife as close as possible to the workpiece.