Things You'll Need
Mirrors are commonly found mounted to doors in bathrooms, closets and bedrooms. These mirrors are typically about a foot wide and four feet tall, giving you a full-body view of your entire outfit. You can attach a mirror to the door with nailed-in mounts, but sometimes you may not want these mounts visible. Another option is to remove the door from the door frame and glue the mirror to it.
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Open the door to an angle of at least 90 degrees.
Wedge several pieces of cardboard under the door at the knob end to support it as you take off the hinges.
Place a small screwdriver under the bottom hinge's barrel and tap it with a hammer to shift the pin upward.
Wedge a flat head screwdriver under the head of the raised pin. Tap the screwdriver with the hammer to gradually remove the pin from the hinge.
Remove the other pins from their hinges. This will allow you to take the door off. Half of each hinge will be attached to the door, and the other half to the door frame.
Lay the door flat on the floor.
Wash the door surface with a multi-purpose cleaner and paper towels.
Subtract the height of the mirror from the height of the door. Divide this number by two to determine how far from the top of the door the top of the mirror should be positioned. Mark this position on the door with a pencil and a carpenter's square.
For example, if the door is 80 inches tall and the mirror is 48 inches tall, there should be 16 inches from the top of the door to the top of the mirror.
Perform the same calculations with the door and mirror width to determine the horizontal position of the mirror. Mark the position with a carpenter's square and pencil.
Put a tube of construction glue into a caulking gun and snip off the tip with a pair of scissors.
Apply a bead of glue onto the back of the mirror. It should go around the perimeter, then zig-zag through the middle in a series of X shapes. The number of X shapes will depend on the length of the mirror.
Place the mirror glue-side down onto the door and press it in place, following the pencil marks. Wipe up any glue that squeezes out from beneath the mirror with a paper towel.
Allow the glue to dry for the time recommended on the tube.
Stand the door up and put the two halves of the hinges back together. Use cardboard to prop the door up to the proper height.
Replace the pins into the hinges, tapping them in place with a hammer.