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 landscape. The last thing you want to see is a sweaty window covered in a coating of condensation.

Not only are windows plastered with condensation unappealing, they also can be a symptom of a more substantial air-quality deficit throughout your home. Fortunately, there’s multiple things you can do to address the problem.

What Creates Condensation on Windows

Condensation on the inner layer of windows is produced by the damp warm air inside your home hitting the colder surface of the windows. It’s especially common during the winter when it’s much colder outside than it is inside your home.

Inside Moisture vs. In Between Panes

When discussing condensation, it’s important to understand the distinction 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 inside a window is produced from the warm moist air inside your home forming along the glass.
  • Existing moisture you notice between windowpanes is caused 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 on the inside of the windows isn’t a window problem and can instead be solved by fine-tuning the humidity inside your home. Many things cause humidity throughout a home, such as showers, cooking, laundry or even breathing.

Why Condensation on Windows Can Be Trouble

Even though you might consider condensation on the inside of your windows is a cosmetic issue, it may also be evidence your home has high humidity. If this is the case, water might also be accumulating on window frames, cold walls or other surfaces. Even a small film of water can cause wood surfaces to mildew or rot over time, increasing the growth of mildew or mold.

How to Decrease Humidity in Your Home

The good news is there are numerous options for removing moisture from the air throughout your home.

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

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

Smaller, portable dehumidifiers can absorb the water from one room. However, these units require clearing water trays and generally service a somewhat limited area. A whole-house dehumidifier will eliminate moisture from your entire home.

Whole-house dehumidifier systems are regulated by a humidistat, which permits you to specify a humidity level precisely as you would select a temperature via your thermostat. The unit will run immediately 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 Cedar Rapids.

Additional Ways to Eliminate Condensation on Windows

  • Exhaust fans. Adding exhaust fans in humidity hotspots including the bathroom, laundry room or above the stove can help by pulling the warm, humid air from these spaces out of your home before it can elevate the humidity level throughout your home.
  • Ceiling fans. Turning on ceiling fans can also keep air flowing inside the home so humid air doesn’t get trapped in one place.
  • Open window treatments. Opening the blinds or drapes can lower condensation by stopping the warm air from being stuck against the windowpane.

By decreasing humidity across your home and circulating air throughout your home, you can take advantage of clear, moisture-free windows even in the middle of the winter.