When you notice water droplets running down a brand-new window, it’s natural to worry there might be a leak letting in the rain. Don’t panic—your replacement windows aren’t leaking! If you’ve been asking yourself, “Why do my windows have condensation on the inside,” those water droplets are just moisture in the air condensing on your window panes, a common occurrence that often surprises homeowners.

Condensation on the inside of your windows might seem like a nuisance, but it’s no cause for alarm. In fact, it’s often a sign of energy-efficient windows that are tightly sealed, trapping warm air inside your home. However, that warm, moist air can create the perfect conditions for condensation to form when it meets the cooler surface of the glass.

Understanding what causes window condensation is key to addressing it effectively. Once you know the underlying factors, you can take steps to reduce or prevent it, so you’re not stuck wiping up water every morning. Let’s dive into what’s behind this common issue and explore practical ways to keep your windows clear and dry.

What Causes Condensation on Windows?

When the air outside is cooler than inside, your windows’ temperature lowers below the home’s interior temperature. You’ll typically see this during the winter months or cooler weather in general. High humidity in your home especially prompts water vapor in the warm air to condense on the colder windows. It’s the same principle that makes cold drinks “sweat” in the summer.

The cooler temperatures make the condensation manifest, but humidity levels in your home are largely under your control. Every time you shower, cook, do laundry, or even breathe, you release moisture into the air. This moisture can build up over time and cause more damage than just water droplets on your windows.

If your interior air becomes too humid, you’ll likely notice mold and mildew forming on different surfaces. The moisture creates an ideal environment for mold to thrive. Some houseplants, such as Boston ferns, actively pull moisture from the air. These plants can help reduce especially high humidity in your home and keep your windows from fogging up.

How to Reduce Window Condensation

There are two primary ways of reducing condensation on windows. First, take time to keep excessive moisture from building up in your home’s indoor air. Install or improve ventilation systems around your bathroom and laundry room to send hot, moist air outside. Set up a dehumidifier if there’s still too much moisture. Reducing the amount of humid air in your home will lower your chances of seeing condensation on your windows.

Second, consider the type of windows you have. Condensation not only indicates excessive moisture in your home but also a lack of proper insulation from your windows. Consider replacing single-pane windows with double-pane, Energy Star-approved windows that keep the cold temperatures outside. The less likely your window is to reach cold temperatures, the less likely you are to notice condensation forming.

Dealing with Condensation on New Windows

The condensation that forms on your windows is harmless. However, it can be a sign of something going wrong elsewhere. Whether indoor humidity levels are higher or your windows aren’t insulating, something is causing condensation to form. Finding out the source will allow you to keep condensation on your windows to a minimum.
Connect with us to learn more about caring for your new replacement windows.