Click to Call (855) 603-1919

Replacement Glass for Double Pane Windows

So your double pane window is cracked, and you need replacement glass? Before you decide whether to install the new double pane window yourself or to hire a professional to do the job, there are a few things you should know about double pane windows, the repair process, and the consequences of a DIY replacement.

Structure of Double Pane Windows

Double pane windows or insulated glass units (IUGs) consist of two panes of glass separated by a spacer and a layer of air that provides insulation. Sometimes this space is filled with gases, such as argon or krypton, for additional insulation.

A failed seal around the glass in an IUG is a common reason to need to replace a double glass window because condensation will become trapped and build up in between the panes. Of course, if the window has broken or is cracked, you will want to replace the glass to preserve the energy efficiency of the window—and for security.  

Other reasons you should consider replacement for double pane windows:

Reasons to Replace Double Pane Windows Infographic

How to Replace Glass for Double Pane Windows

You never know when you may need to replace the glass in your double pane windows. Natural disasters, errant baseballs, a break-in by an intruder or simply a failed seal can happen at any time. It's a good idea to know what is involved in finding and installing replacement glass for your double pane windows before you try to tackle the job yourself.

You will need some time, patience, step-by-step instructions and a few specialized tools including a suction cup grip, at least one putty knife and silicone sealant as well as a double pane replacement glass unit. 

  • If there is molding around the window unit, pry it loose and set it aside.
  • Remove the rubber glazing around the edges with a putty knife.
  • Cut the sealant that holds the IUG in the frame.
  • Use a suction cup grip to lift the old window unit out of the frame. If the window is not in tact, you can carefully break away the remaining broken glass. Always wear protective gloves and goggles when handling broken glass.
  • Apply silicone sealant into the channel where the replacement glass panel will go.
  • Insert replacement glass using suction cup grip. Apply new sealant to hold the replacement glass in place. 

It is worth noting that some manufacturers of double pane window units will not honor their warranties unless the units are installed by a professional. In order to get the job done right the first time and preserve your warranty, you may want to call a professional glass replacement shop that will come to your home to take measurements, order the IUG, and install it for you. 

Call our glass specialists at Glass Doctor® for a free, in-person consultation at 855-603-1919.



Broken Window Theory:

Repairing Double Paned Windows: