Technically, yes, you can replace just the single sheet of glass. However,
Double-pane windows have two layers of glass separated by a spacer and filled with air or insulating gas (like argon). There are three scenarios:
Breaking one pane immediately ruptures the airtight seal, allowing the insulating gas to escape. one pane of double pane window broken
If the break was caused by vandalism, a storm, or a tree branch, your homeowner’s or renter’s insurance may cover the repair after your deductible. For a single small crack, it’s usually not worth the claim.
If your window is already fogging (failed seal) on the other side, or if the broken pane is over 10 years old, replace the whole IGU. You’ll save labor costs later. Technically, yes, you can replace just the single
Skip to “Option 1” below. You need a full replacement.
Here is why replacing only the broken pane is usually a mistake: If the break was caused by vandalism, a
Instead of replacing the glass pane, you replace the entire IGU (Insulated Glass Unit) . This means replacing both panes of glass and the spacer between them as a single block. This restores the factory seal and the energy efficiency of the window.
Put on heavy work gloves and safety glasses. If the glass is shattered but still hanging in the frame, it is dangerous. Do not attempt to knock the remaining glass out of the frame yourself unless you are experienced.