Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows of your home open up to the outdoors, a way to let light in as you appreciate the view of your garden, yard or other surroundings. The last thing you need to see is a sweaty window covered in a coating of condensation.

Not only are windows covered in condensation unattractive, they also can be a sign of a more substantial air-quality problem throughout your home. Thankfully, there’s multiple things you can try to address the problem.

What Causes Condensation in Windows

Condensation on the inside of windows is formed by the moist warm air in your home reaching the colder surface of the windows. It’s particularly commonplace around the winter when it’s much chillier outside than it is in your home.

Inside Moisture vs. In Between Panes

When dealing with condensation, it’s crucial to know the contrast between moisture on the inside of your windows compared to moisture in between the windowpanes. One is an air-quality issue and the other is a window issue.

  • Moisture within a window is caused from the warm moist air throughout your home forming along the glass.
  • Any moisture you notice between windowpanes is produced when the window seal stops working and moisture gets in between the two panes of glass, and at that point the window should be repaired or replaced.
  • Condensation inside the windows isn’t a window problem and can instead be resolved by adjusting the humidity across your home. Many things generate humidity in a home, like showers, cooking, laundry or even breathing.

Why Condensation on Windows Can Be a Problem

Although you might presume condensation in your windows is a cosmetic concern, it may also be evidence your home has higher humidity. If this is the case, water may also be collecting on window frames, cold walls or other surfaces. Even a thin film of water can cause wood surfaces to mildew or rot over time, promoting the growth of mildew or mold.

How to Lower Humidity Inside Your Home

Fortunately there are various options for eliminating moisture from the air inside your home.

If you have a humidifier active in your home – whether it be a small-scale unit or a whole-house humidifier – lower it further so the humidity inside your home decreases.

If you don’t have a humidifier running and your home’s humidity level is higher than you prefer, consider getting a dehumidifier. While humidifiers add moisture in your home so the air doesn’t become too dry, a dehumidifier extracts excess moisture out of the air.

Small, portable dehumidifiers can remove the water from one room. However, these units require emptying out water trays and usually service a somewhat limited area. A whole-house dehumidifier will extract moisture throughout your entire home.

Whole-house dehumidifier systems are controlled by a humidistat, which enables you to establish a humidity level the same as you would choose a temperature on your thermostat. The unit will begin running automatically when the humidity level overtakes the set level. These systems work with your home’s HVAC system, so you will want to contact experienced professionals for whole-house dehumidifier installation Montoursville.

Additional Ways to Decrease Condensation on Windows

  • Exhaust fans. Adding exhaust fans around humidity hotspots like the bathroom, laundry room or above the kitchen range can help by extracting the warm, moist air from these rooms out of your home before it can raise the humidity level throughout your home.
  • Ceiling fans. Spinning ceiling fans can also keep air swirling within the home so humid air doesn’t get stuck in one spot.
  • Opening up window treatments. Opening the blinds or drapes can lower condensation by stopping the warm air from being stuck against the windowpane.

By reducing humidity in your home and moving air throughout your home, you can make the most of clear, moisture-free windows even during the winter.