How to Install Mitered Laminate Countertops

Installing a plastic laminate countertop on a cabinet is an inexpensive way to spruce up the appearance of a kitchen. Although it might seem difficult, the installation is a straightforward procedure, provided you take accurate measurements. Although slightly more expensive, custom-made countertops are even easier to install, allowing you to complete the process yourself instead of hiring a professional. However, pay attention when installing mitered ends, so the joint formed by attaching two perpendicular pieces is properly aligned, flush and smooth. A badly fit counter not only stands out, but causes leakage and odor problems.

Carpenter’s glue
Caulking gun and adhesive caulk
Wet rag
I-bolts
Level, 4-foot
Rubber mallet
Wrench
Drill and drill bit
Wood screws, 1 1/4-inch

Instructions

- 1
  Lay the two mitered perpendicular laminate sections upside down on a hard and level surface. Join their connecting ends flush against one another to align the mitered joint perfectly.
- 2
  Separate both the sections 4 inches apart and apply an even layer of carpenter’s glue over both the connecting edges. Alternatively, apply a thin layer of adhesive caulk over each connecting edge using a caulking gun. Avoid adding too much; otherwise, it will drip along the front or back of the joint.
- 3
  Press the glued edges of both countertop sections together, ensuring the edges align properly, so the top and bottom are level. Hold the two sections tightly together for two minutes to secure the perpendicular joint before placing it back on the surface. Wipe excess glue or caulk that oozes between the joint with a wet rag.
- 4
  Slide I-bolts into the slots provided along the perpendicular joint. Resembling dumbbells, the bolts are composed of a screw sandwiched between two nuts.
- 5
  Tighten the screws on the I-bolts halfway to secure the mitered joint. The bolts pull the two laminate sections together at the mitered joint.
- 6
  Adjust the two sections to align them properly. Lay a carpenter’s level on the joint and check which part is slightly higher or lower. Lightly tap the sides of the countertop with a rubber mallet to ensure the seam is level.
- 7
  Tighten the I-bolts with a wrench to pull the laminate countertop sections together. Let the glue or caulk dry for the time specified on the label instructions.
- 8
  Assign a helper to hold one end of the countertop while you hold the other. Turn it over and place it on the cabinet frame, with the I-bolts facing downward. With the assistant holding the countertop firmly against the wall, drill three pilot holes through the cabinet’s corner brace and into the underside of the countertop.
- 9
  Insert 1 1/4-inch wood screws through the pilot holes to secure the mitered countertop in place.

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