How to Replace Panes in Glass Bifold Doors

What You'll Need
Putty Knife
New Window Pane
Measuring Tape
Glazing Compound

Glass bifold doors make a great addition to the decor of any room, but over time, these glass panes can become damaged. Learning how to replace these glass panes yourself can save you a lot of money. Broken glass doesn't only look bad, but it can also be extremely dangerous. Replacing glass panes in glass bifold doors isn't actually as complicated as you might imagine. With the right tools and materials, you should have no problem completing this project in a weekend.

Step 1 - Measuring

The first thing that you need to do is measure the size of your broken window pane. Carefully measure the size of the windowpane. Subtract 1/8 of an inch to allow for wood expansion, the squareness of the glass and the opening, and for ease of insertion. Cutting glass can be pretty difficult, so if you do not have the experience, have a professional cut your glass to shape.

Make sure that you buy safety glass—in fact, if the rest of the glass in the door isn't safety glass then you might want to consider replacing it all. Safety glass is especially important if you have young children who might run into the door. Safety glass has a sheet of plastic in the middle that will prevent it from shattering.

Step 2 - Removing the Broken Glass

Remove the broken glass panels from the bifold doors. Make sure that you do this very carefully so that you don't cause yourself any harm. Use your putty knife to remove the strip of wood which holds the glass in place. You might want to wear some safety gloves at this stage to avoid cutting yourself.

When the glass is removed, use your putty knife again to remove all of the glazing compound from the window frame. This is important as it will allow your new pane of glass to fit securely into the door.

Step 3 - Replacing the Glass

Now you need to use glazing compound and run it around the window frame. Press the new pane of glass against the window frame and make sure it is in contact with the glazing compound. Use glazing points to fix the window panes in place. Then replace the wooden strips and hammer them into place using nails. Make sure that the glass is secure and that it doesn't move.

Make sure that the glass isn't pressed too tightly against the window frame because this could cause damage or break the glass.

Step 4 - Finishing Touches

Once the window pane has been replaced you should check the condition of the rest of the door. The wooden panels will be damaged by hammering them into the door frame. Give these a lick of paint to freshen up the look of the entire door. If there is any glazing compound on the glass pane, use your putty knife to scrape it off.

Replace any broken glass panels as quickly as possible to prevent injury and to improve the look of your door.