Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows in your home are a gateway to the outdoors, a way to let light in when you take in the view of your garden, yard or scenery. The last thing you would want to see is a sweaty window covered in a layer of condensation.

Not only are windows covered in condensation unsightly, they also can be evidence of a larger air-quality issue inside your home. Fortunately, there’s multiple things you can try to correct the problem.

What Produces Condensation on Windows

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

Inside Moisture vs. In Between Panes

When talking about condensation, it’s necessary to understand 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 inside a window is created from the warm moist air throughout your home collecting against the glass.
  • Existing moisture you see between windowpanes is caused when the window seal fails and moisture seeps between the two panes of glass, and at that point the window needs to be repaired or replaced.
  • Condensation on the inside of the windows isn’t a window issue and can instead be resolved by fine-tuning the humidity across your home. Many things generate humidity throughout a home, such as showers, cooking, laundry or even breathing.

Why Condensation on Windows Can Be Trouble

Although you might consider condensation in your windows is a cosmetic issue, it can be evidence your home has excess humidity. If that’s the case, water could also be condensing on window frames, cold walls or other surfaces. Even a small film of water can encourage wood surfaces to mildew or rot over time, fostering the growth of mildew or mold.

How to Lower Humidity Inside Your Home

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

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

If you don’t have a humidifier going and your home’s humidity level is high, look into installing a dehumidifier. While humidifiers put moisture into your home so the air doesn’t become too dry, a dehumidifier draws excess moisture out of the air.

Compact, portable dehumidifiers can remove the water from a single room. However, these units require emptying out water trays and most often service a somewhat limited area. A whole-house dehumidifier will eliminate moisture throughout your entire home.

Whole-house dehumidifier systems are managed by a humidistat, which permits you to set a humidity level precisely as you would select a temperature with your thermostat. The unit will start instantly when the humidity level exceeds the set level. These systems coordinate with your home’s HVAC system, so you will want to contact qualified professionals for whole-house dehumidifier installation Long Beach.

Alternative Ways to Reduce Condensation on Windows

  • Exhaust fans. Installing exhaust fans around humidity hotspots such as the bathroom, laundry room or above the stove can help by pulling the warm, moist air from these rooms out of your home before it can elevate the humidity level across your home.
  • Ceiling fans. Spinning ceiling fans can also keep air swirling inside the home so humid air doesn’t get caught up in one place.
  • Open window treatments. Throwing open the blinds or drapes can decrease condensation by preventing the damp air from being trapped against the windowpane.

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