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How To Replace A Piece Of Glass In A Multi-Pane Window

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If one of the sections in a multi-pane window in your home's living room has shattered after a blunt object slammed into it, replace the glass with the following steps. After completing the repair, the window will be restored to its original condition and can be used in a normal manner.


  • ​drop cloth
  • work gloves
  • small hammer
  • putty knife
  • mild detergent
  • water
  • lint-free cloths
  • measuring tape
  • glass pane
  • tube of glazing compound
  • caulk gun

Remove Glass And Glazing Compound 

Set up a drop cloth underneath the window on the opposite side that you are standing on to catch loose pieces of glass. Remove large sections of glass with glove-covered hands. If any pieces are difficult to remove in this manner, lightly tap them with a small hammer to assist with loosening them. Pull the glazing points out of the frame with the edge of a putty knife. The points are small and will be located on each side of the frame.

Use the edge of a putty knife to remove any pieces of old glazing compound that are stuck in the frame. Clean the inside of the frame with soapy water and a lint-free cloth to remove any residue that remains on its surface. Dry the frame's interior with another cloth. Measure the frame so that you can purchase a piece of replacement glass that is the correct size.

Insert The New Pane And Secure It

Line up the new piece of glass so that each side is resting inside of the frame. Do not press down on the center of the pane while you are lining it up because this can break it. Place the glazing points around the frame and tap them firmly with a hammer until they are secure.

Insert a tube of glazing compound into a caulk gun's central chamber. Squeeze the gun's trigger as the tip of tool is aimed at the frame's interior. Apply a thin, even line of glazing putty all the way around the pane. Use a putty knife to smooth out the putty. If too much putty is applied in any areas, remove it with a damp sponge.

Test the firmness of the putty with your fingertips after a few hours to determine if it has hardened. Once this occurs, the window will be in the shape that it was in before the pane broke. You can open and close it when you would like to and the pane will remain intact. If the job is too big for you to do yourself, visit a window repair shop like Fas Windows and Doors.