How to Replace Double Pane Window Glass: Gasket Type

  • 2-6 hours
  • Beginner
  • 35-75
What You'll Need
Glass pane
Rubber mallet
Rubber stops
Caulk or sealant
Glass cleaner

A double pane window glass can easily get scratches, break or just need a replacement to give your window a new look. In a gasket type double pane window, there is a seal around the glass that prevents moisture from entering the window. The moisture can cause condensation. You can easily replace the old glass with a new one on your own by following the simple instructions below:

Step 1 - Remove the Panel of the Window

First you will need to remove the panel of the window. There are two different kinds of panels, an immobile window panel and a sliding window panel. Both can be easily removed. For an immobile window panel, you will have to use a screwdriver to unscrew the screws that hold the panel from top to bottom. Be careful while doing this, because if you take out all the screws without balancing the sides, the glass may also drop and hurt you. If your window has a sliding panel, then you will have to lift it and drag or pull the bottom of the panel.

Step 2 - Remove the Old Glass from the Window Frame

The next step for you would be to extract the old glass from the window frame. For this again, get hold of your screwdriver and unscrew the screws of the window frame. To remove the glass pane from the window frame, make use of a rubber mallet to lightly tap on the frame. A rubber mallet is soft and flexible so it won’t break the glass pane and aid in detaching it from the frame.

Step 3 - Making Use of the Rubber Stops

After removing the glass pane from the window frame, check for rubber stops. The rubber stops are found within the window frame and their purpose is to keep the glass pane well connected to the frame. So take hold of the rubber stops that lie within the frame and put them aside to use them when the new glass pane is fitted. If these rubber stops have aged and become useless, you can easily get new rubber stops from any hardware store. Insert the new glass pane into the frame and set the rubber stops at their positions. Using the screwdriver, place the screws at their places in the window frame and screw them tightly.

Step 4 - Seal the Window Frame

A drop of caulk or a sealant will not only stop moisture from rising onto the window but also serve the purpose of a pillow for the new glass pane against the window frame. Between the glass pane and the window frame, you will have to use a bead of caulk or a sealant to seal the window frame.

Step 5 - Place the Frame Back into Position

Lastly, you need to place the frame back into position. Once you have done this, check that all screws are properly tightened. Clean the glass using glint or any glass cleaner to remove any hand marks or dust.