How to Fix Moisture & Condensation Between Double Pane Windows

When condensation between double pane windows forms it means the seal on the insulated glass unit has failed. In this situation, the solution is simple—replace just the glass, not the entire window.

How Insulated Glass Works

With double pane windows, the insulating airspace in between the glass panels reduces heat loss. Most modern windows have two seals: an inner seal to protect against moisture and corrosion, and an outer seal to protect the strength of the window. The seals hold a spacer in place—usually a tube containing water-absorbing chemicals, otherwise known as a desiccant. These two panes of glass, with the seal and spacer is known as an Insulated Glass Unit or IGU.

Why Do Seals Break?

For the most part, insulated glass windows work extremely well. They can withstand and handle all types of weather, including cold temperatures, heat, and humidity, as well as repetitive open and close motions. With the double seal, when one seal begins to break, the other can hold the line for a while. However, as the window ages its components begin to break down, and the standard lifespan of double pane windows ranges from 10 to 20 years.

Other than old age, there are two additional factors that affect seal breakage:

  • Water retention in the frame or improper drainage around the window.
  • Direct exposure to sunlight—the more sun your window gets, the more heat will build up causing the panes to expand, contract and eventually weaken.

Once the seal is broken, moisture begins to form between the panes, giving your windows a milky, foggy look.

Call a Professional to Fix Condensation Between Your Window Panes

At Glass Doctor, we do our best to save the window and replace just the glass, which reduces the cost of your repair and creates a more eco-friendly home.

When moisture gets through the seal on glass unit, call one of our professionals to replace the IGU.

Call Glass Doctor Today

If there’s condensation between the panes in your windows, find a Glass Doctor professional near you to correct the problem. We’re fast, professional and affordable. Call 855-603-1919 today.




The Spruce:

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