How to mount oversize wall mirrors

Written by f.r.r. mallory
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How to mount oversize wall mirrors
Large wall mirror. (Candlestick in the Mirror image by Arne Bramsen from

The biggest issue with mounting oversized wall mirrors is compensating for their size and weight. The mirror should be accurately weighed prior to selecting the type of mounting hardware used to secure the mirror. Larger mirrors are often mounted using cleat systems that allow the weight of the mirror to be distributed so that the stresses placed on the mirror frame are reduced. A cleat system uses a large metal bar with a slotted edge that mounts to the wall across the width of the mirror. Two or more smaller reciprocal mounting cleats are attached to the back side of the mirror, and the cleats interlock for a secure mount to the wall.

Skill level:
Moderately Easy

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Things you need

  • Level
  • Pencil
  • Interlocking Metal Cleats
  • Screws
  • Power screwdriver
  • Drill

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  1. 1

    Measure the width of the mirror and purchase a wall cleat that corresponds to the weight and size of the mirror. Often the wall cleat will be 1 to 2 inches smaller than the outside width of the mirror in order to hide the cleat from side view. Measure the width of the frame. The mounting cleats should be shorter than the width of the frame.

  2. 2

    Hold your mirror to the wall to locate the height and position where you want to mount it. Mark the wall where the top of the mirror should be with a pencil. Measure the height of the mirror and divide by three. Measure down a third of the way from the top of the mirror and mark the locations for the mounting clips on the frame. Measure down a third of the way from the mark on the wall and mark the location for the wall cleat.

  3. 3

    Move a stud finder across the wall in the area where the cleat will be mounted. Locate the studs and mark them. Draw 6-inch vertical lines in pencil on the wall to indicate the vertical location of studs. Draw a horizontal line, using a long level, that crosses over your stud lines.

  4. 4

    Screw your wall cleats through the metal cleat into the underlying studs. It may be necessary to drill new holes in the metal cleat. The cleat should be lined up level along the horizontal line.

  5. 5

    Locate your measure marks on the back side of the mirror frame. Screw the reciprocal mounting cleats horizontally into the back of the frame at these locations.

  6. 6

    Slide your mirror down the wall until the cleats interlock. Make sure you centre your mirror over the wall cleat when you start so that it is centred when the cleats interlock.

Tips and warnings

  • Always opt for a heavier mount if your mirror is on the weight border between two classes of hardware.

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