Why Do My New High-Performance Windows Have Condensation?

Condensation on windows can be surprising, especially when you’ve just upgraded to top-of-the-line, high-performance windows. You might ask yourself, “Aren’t new windows supposed to be better at keeping out moisture?”

As it turns out, this foggy issue is not just common, but it can also be a sign that your high-performance windows are doing their job. Let’s unravel this misty mystery together and look into why your new, high-performance windows have condensation.

What Causes Condensation?

At the heart of our window water woes is the simple science of condensation. This occurs when warm, moist air meets the cooler surface of the window, causing the water vapor to transform into liquid on your shiny new panes. It’s a lot like when a cold drink “sweats” on a hot summer day.

We do things at home that add moisture to the air—cooking, showering, or watering plants. High-performance windows seal in moist air and don’t allow it to escape easily. While they’re champions at keeping your home snug and your energy bills low, they can sometimes set the stage for water showing on the window.

Why Exterior Condensation Is a Good Thing

Now that we know why condensation appears on windows, we can explore what it means for your new high-performance windows. Seeing the occasional dew on the outside of your windows shouldn’t raise alarms—in fact, it’s evidence of your windows’ effectiveness. The exterior cools, especially on clear nights when the warmth of your home doesn’t mix with the chill of the outside air.

External condensation is a telltale sign that your windows are preventing heat loss. Condensation is proof that they’re working as they should. Next time you notice that external perspiration, give your windows a figurative pat on the back for a job well done.

When Should Condensation Be a Cause for Concern?

Keep in mind that not all condensation is cause for celebration. You should raise an eyebrow when the inside of your windows resembles a rainforest climate. Condensation on the inside of windows becomes even more concerning when it’s persistent and excessive. This issue could indicate that the humidity levels inside your home are too high and your moisture management needs tweaking.

Persistent moisture can lead to deterioration or mold growth on wooden window frames—a definite no-go for your home’s air quality and your family’s health. If you spy condensation between the panes of a double-glazed window, it might mean the seal’s integrity has been compromised and is no longer performing at its peak.

A little condensation on window exteriors can be the hallmark of a job well done by your windows, keeping interior temperatures comfortable. If you’re in the market for new, premium windows or want to reap their benefits, let The Window Source of The Rockies handle the installation. We specialize in double-hung window replacement, providing you with durability, energy efficiency, and a beautiful and comfortable home.