How to break a glass mirror

Updated April 17, 2017

Bad luck or not, sometimes a mirror must be broken. Large bathroom mirrors are notoriously difficult to remove from walls. Often you must break the mirror and remove it in smaller pieces. Some craft projects require you to break pieces of mirror from a larger piece. Since mirrors can break into dangerous shards that can cause serious eye injuries and cuts, you must exercise caution when breaking a mirror.

Put on gloves and safety glasses.

Place a tarp under the mirror.

Score the mirror into sections with a glass cutter.

Place strips of duct tape on top of the score lines.

Cover the mirror's entire surface with carpet protector film, which is available at home improvement stores.

Tap the mirror lightly with a small hammer along the duct-tape covered score lines until the glass breaks.

Remove the carpet protector film and duct tape carefully if you're reusing the mirror pieces.


Some garbage collection services require you to tape discarded mirror shards to protect workers from sharp edges.


Never break a mirror without leather gloves and safety glasses.

Things You'll Need

  • Glass cutter
  • Duct tape
  • Carpet protector film
  • Tarp
  • Gloves
  • Safety glasses
  • Small hammer
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About the Author

A journalist since 1985, Susan Walworth has written for both weekly and daily newspapers, including "The Eufaula Tribune" and "The Dothan Eagle." She has won numerous state press association awards for photography, news and feature writing. She holds a Bachelor of Arts in journalism from Auburn University.