How to Glue Granite Countertops

Written by constance barker
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Granite countertops are becoming widely used in new or upgraded kitchens. The stone comes in a variety of colours and adds a touch of elegance to a room. Installation of granite is a precise procedure involving constant measuring to ensure proper placement. The stone is extremely heavy and needs several people to move and lay the stone. Gluing the underside of the granite to plywood is one way of making sure the stone is level and has support throughout the countertop.

Skill level:

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Things you need

  • Measuring tape
  • 3/4 inch thick plywood
  • Rubber paint
  • Plastic sheeting
  • 310 Epoxy glue

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  1. 1

    Measure the size of the granite countertop area and cut a sheet of 3/4-inch thick plywood to the same size. Then place the plywood in the area where the granite countertop will be placed.

  2. 2

    Brush rubber paint onto the plywood. You may use plastic sheeting instead of the rubber paint; either one will work. The rubber paint or the sheeting keeps moisture from building up between the wood and the granite, resulting in mildew or rotting of the wood.

  3. 3

    Place 310 epoxy glue on the underside of the granite slab. Place three to four dots of glue 18 inches apart along the back side of the granite, but not on the overhang.

  4. 4

    Turn the granite slab right side up and lay the granite slab onto the plywood piece. Be sure to have the granite directly over the section where it's going to be placed in order to get it into the right space. Having several men hold the piece when placing it will make it easier to get it in the correct space. Glue should harden within one to two hours.

  5. 5

    Caulk the granite to the wall or back splash. Do not glue or caulk granite to surrounding kitchen appliances.

Tips and warnings

  • Follow the manufacturer's instructions regarding installation of granite countertops. Disregarding the manufacturer's instructions might void the warranty.

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