At SRS Windows and Doors, we’re committed to ensuring your home remains energy-efficient and comfortable. One common question we receive from homeowners is about exterior condensation on high-performance windows. Why does it happen, and should you be concerned? Let’s break it down.

What Causes Exterior Condensation?

If you’ve recently installed high-performance or triple-pane windows and notice condensation on the outside, don’t worry—this is a good sign. This exterior condensation is essentially the result of your windows doing their job. Just like dew forming on grass on a cool morning, this moisture collects when the temperature of your window’s exterior drops below the dew point of the surrounding air.

This natural phenomenon is known as night sky cooling, where the glass surface cools under a clear night sky, causing condensation to form. So, when you notice condensation, it’s a sign that your windows are effectively preventing heat loss from inside your home.

Why High-Performance Windows?

High-performance windows are designed to maintain the internal temperature of your home by blocking heat from escaping through the glass. This energy-efficient design helps you save on heating and cooling costs. However, because these windows don’t allow heat to transfer to the outside as readily as less efficient windows, the outer pane stays cooler, especially on clear nights, leading to condensation.

Factors That Influence Exterior Condensation

Several factors play a role in whether or not your windows develop exterior condensation, including:

  1. Clear Night Skies: Just like how grass cools under a clear sky, your windows are exposed to the cold of outer space, leading to moisture formation.
  2. Relative Humidity (RH): High humidity levels increase the likelihood of condensation. Homes near water bodies, like lakes, often experience this.
  3. Wind Speed: On calm nights, less heat transfers to the glass, making it more prone to condensation.
  4. Window Placement and Design: Windows with overhangs or obstructions, such as trees, may have less condensation as they are partially protected from night sky cooling.

What Can You Do About It?

The good news is you don’t need to do anything about exterior condensation—it’s a sign of high performance. Just like dew evaporates from grass as the sun rises, condensation on your windows will disappear naturally as the day warms.

If you’re looking to minimize condensation, you could consider minor adjustments, like increasing ventilation around the window area or using external window treatments. However, this condensation indicates that your windows are energy-efficient and keeping your home comfortable.

Conclusion: It’s a Sign of Quality

Exterior condensation on your windows is a sign that they are functioning exactly as they should, keeping your home well-insulated and energy-efficient. At SRS Windows and Doors, we’re proud to provide high-quality, high-performance windows that ensure your home remains comfortable and energy-efficient year-round.

For more information about window performance or to explore our window options, feel free to contact us at SRS Windows and Doors, or visit us online for more tips and insights.

Stay comfortable, stay energy-efficient!

HOLIDAY HOURS: Closing: Wednesday, December 20, 2024, at 12:00 PM & Reopening: Monday, January 6, 2025, at 8:00 AM