Step 2: Attach the mirror and hardboard

Apply wood glue to the hardboard strips and clamp them in place. Apply mirror glue to the back of the mirror in a zigzag pattern, and nestle it inside the hardboard strips. The hardboard strips should lie flush with the surface of the mirror and create an even plane for the molding to be installed.
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    Tools List

    • circular saw
      Circular saw
    • hammer
    • hand clamps

    Shopping List

    ½-inch plywood Get a full sheet

    ¼-inch hardboard Get a 4x4 sheet

    3-by-4 foot mirror

    3-inch fluted door casing Get two 8-foot pieces.3½-inch corner block Get four.

    3d finishing nails

    Wood glue

    Mirror adhesive caulk