How to Repair Glass Window Panes

If you have a window with a single pane of broken glass, don’t worry— Lou is going to help you  fix it in 15 minutes.

In this tutorial, you will learn how to remove the old glass and replace it with a new piece so it looks like new.

Before you can fix your window, you have to assess the extent of the damage.  In this example, we’re working with a wood frame window and replacing the entire piece of glass within the sash.  On some older windows, you may have a series of individual glass panes between each of the muntin bars (also called lites or mullions).  You also need to make sure you have the proper tools for the job: putty knife, glazing, new glass, tape measure/ruler, eye protection gloves and some newspaper (more on that later).

Fortunately, this job primarily involves some patience and elbow grease, so it’s something a DIYer would be comfortable with.  However, if you don’t feel confident working with glass you can hire a handyperson.  If you go that route, you may want to identify a few other jobs around the house to make it a more worthwhile investment.

How to repair a glass window pane:

  1. Wear eye protection and gloves–safety never takes a holiday
  2. Cover the window with a newspaper before you break any remaining glass in the window
  3. Use a putty knife and hammer to chisel away the excess glass and existing glazing (be gentle so as not to damage the frame)
  4. Measure the opening and add ⅛”
  5. Bring measurements to the hardware or glass store
  6. Slide new glass into groove and use putty knife and glazing to keep in place

If you have a window with a single pane of broken glass, don’t worry— Lou is going to help you  fix it in 15 minutes.

In this tutorial, you will learn how to remove the old glass and replace it with a new piece so it looks like new.

Before you can fix your window, you have to assess the extent of the damage.  In this example, we’re working with a wood frame window and replacing the entire piece of glass within the sash.  On some older windows, you may have a series of individual glass panes between each of the muntin bars (also called lites or mullions).  You also need to make sure you have the proper tools for the job: putty knife, glazing, new glass, tape measure/ruler, eye protection gloves and some newspaper (more on that later).

Fortunately, this job primarily involves some patience and elbow grease, so it’s something a DIYer would be comfortable with.  However, if you don’t feel confident working with glass you can hire a handyperson.  If you go that route, you may want to identify a few other jobs around the house to make it a more worthwhile investment.

How to repair a glass window pane:

  1. Wear eye protection and gloves–safety never takes a holiday
  2. Cover the window with a newspaper before you break any remaining glass in the window
  3. Use a putty knife and hammer to chisel away the excess glass and existing glazing (be gentle so as not to damage the frame)
  4. Measure the opening and add ⅛”
  5. Bring measurements to the hardware or glass store
  6. Slide new glass into groove and use putty knife and glazing to keep in place