A double-pane window is made of two pieces of tempered glass that are made to fit together and are separated with a spacer. Hence, the resulting space is either a vacuum or filled with air, creating an insulator from extreme temperatures and noise. If the mirror gets damaged, it can be a little tricky to replace it, especially without breaking the frame. It can be complicated to get the whole process of replacement right. To know about the replacement options, cost, and process, read the blog.
Replacement Options for Double-Pane Windows
There are different replacement options depending on the type of window damage:
Sash Replacement
Instead of getting the entire unit replaced, you can also choose to replace just the sash. You can get the sash made by manufacturers by providing them with the window dimensions.
Sash replacements are more cost-efficient compared to complete window replacement. This is the best option if the frame is not damaged and the manufacturer can make the sash that fits your roof.
Glass Assembly Replacement
Certain companies make just the glass that fits into the sash, but you still need to take the sash apart to fit the glass. These replacements are generally less expensive than sash replacements. To remove the damaged glass and then install the new glass that fits the window perfectly, it is advised to hire a professional technician.
Entire Window Unit Replacement
Generally, you only need replacements for a few parts of the window. But you can also replace the entire window unit. However, this is the most expensive choice. But if the frame is damaged, or the window is very old, or if replacement parts are unavailable, this is the best choice.
Double Pane Window Replacement Cost

The replacement cost of a double-pane window depends on the parts that are being replaced. Here’s a guide to the cost of replacement for different parts:
A Standard-Size Double-Pane Window Replacement – Glass Only
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Single Hung: $100 to $150
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Double Hung: $260 to $290
A Standard-Size Double-Pane Window Replacement, Including Glass and Frame
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Single Hung: $175 to $350
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Double Hung: $300 to $800
Double Pane Non-Standard Size Window - Glass Only
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Square Foot: $3 to $6
Double Pane Non-Standard Size Window - Low E, Thermal Glass
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Square Foot: $10 to $14
Factors Affecting Double-Pane Window Replacement Costs
There are a few factors that affect the cost of double-pane window replacement:
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Style of the window.
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Material of the window.
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Type of glass.
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Brand.
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Energy-efficiency features of the glass.
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Labor cost for installation.
Process of Glass Window Replacement

Measurement of the Window
The first step is to measure the window for the right fit. Find out the width and height of the new glass with a tape measure and the thickness of the glass with a specialized caliper.
Manufacturing
The glass window starts as a large sheet, which is cut to proper dimensions by the machines. Two pieces of the same size are cut, as it is an insulated glass.
The metal frames used to hold the glass together are also made by the factory. After cutting and fastening the frames, they are drilled to install an insulating layer providing resistance to moisture. A sealant is also installed to hold the two panes together.
Finally, the glass panes are attached to the frame. Argon gas is injected between the two panes to seal the assembly shut. Lastly, polysulfide sealant is applied along the frame’s perimeter.
Removal of the Old Glass
The sash is removed from the window, and then all the stops holding the window are removed. Then, the utility knife is used to cut through the sealant, and finally presses the window assembly is pressed out of the frame. Since the glass is sharp, it is best to use cut-resistant rubber gloves.
Installation of the New Glass
For the final installation of the new glass, a thick layer of caulk is applied around the sash’s inner perimeter that comes in contact with the glass. Then, the assembly is carefully placed on the caulk and pressed to tighten it. Reinstall the stops and other hardware after this. Make sure you leave the caulk to sit for at least 48 hours before opening or closing the window.
Conclusion
Replacing a double-pane window may seem complicated, but with the right information, it is not that difficult. You just need to find out the right window replacement process based on the extent of damage to the window and your budget. Also, accurate measurements are important for the proper installation. You should hire a professional if the window replacement seems overwhelming.