How to Install Prefab Granite Countertops


Prefabricated granite countertops provide an elegant look to your kitchen at a lower cost than buying a whole slab of granite. They are already cut and the edges are finished so it requires less work to install them, saving the homeowner a lot of money. You can save even more money by installing the prefab granite countertop yourself. Prefab granite countertops typically come with a standard eased or bull-nosed edge and are designed to fit standardized kitchen countertops.

Things You'll Need

  • Tape measure
  • Screwdriver
  • Putty knife
  • 3/4-inch-thick plywood
  • 1-inch screws
  • Glue compound designed for countertops
  • Measure the length and width of your existing countertop. Also measure the backsplash and note where electrical outlets are located.

  • Have a professional (or do it yourself if you are skilled in carpentry) cut out the shapes in the countertop to accommodate your appliances and fixtures.

  • Remove the current countertop that you wish to replace. There might be screws that you need to unscrew that are holding it in place or glue that you will need to pry off with a putty knife. Disconnect the sink plumbing, backsplash and any appliances that are in the way. Remove anything else that is attached to the countertop.

  • Measure a 3/4-inch-thick piece of plywood cut to the shape of the countertop.

  • Fasten the plywood into the cabinetry using 1-inch screws to form the base of the prefab granite countertop.

  • Apply a thick layer of a glue compound designed for granite on to the plywood.

  • Place the granite countertop gently on top of the plywood. Granite is very heavy so you will need a few people to lift it into place.

  • Install the sink, backsplash, appliances and anything else that was removed for installation of the granite countertop. To keep the countertop from shifting, refrain from using the countertop for three to six hours.

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