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 draw 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 plastered in a film of condensation.

Not only are windows covered in condensation unappealing, they also can be evidence of a larger air-quality problem throughout your home. Luckily, there’s multiple things you can do to resolve the problem.

What Creates Condensation on Windows

Condensation on the inside of windows is created by the humid warm air throughout your home mixing with the cold surface of your windows. It’s especially prevalent in the winter when it’s much colder outside than it is within your home.

Inside Moisture vs. In Between Panes

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

  • Moisture on the inside of a window is caused from the warm moist air in your home forming against the glass.
  • Any moisture you find between windowpanes is caused when the window seal breaks down and moisture gets in between the two panes of glass, and by then the window needs to be repaired or replaced.
  • Condensation in the windows isn’t a window issue and can instead be fixed by changing the humidity inside your home. Many things cause humidity throughout a home, including showers, cooking, laundry or even breathing.

Why Condensation on Windows Can Be Trouble

Though you might consider condensation inside your windows is a cosmetic problem, it could also be a sign your home has excess humidity. If this is in fact 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, increasing the growth of mildew or mold.

How to Lower Humidity Throughout Your Home

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

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

If you don’t have a humidifier active and your home’s humidity level is higher than you prefer, think about getting a dehumidifier. While humidifiers put moisture in 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 a single room. However, these units require emptying water trays and most often service a somewhat limited area. A whole-house dehumidifier will remove moisture from your entire home.

Whole-house dehumidifier systems are controlled by a humidistat, which permits you to establish a humidity level precisely as you would choose a temperature with your thermostat. The unit will run immediately when the humidity level exceeds the set level. These systems work with your home’s HVAC system, so you will receive the best results if you contact qualified professionals for whole-house dehumidifier installation Dayton.

Other Ways to Eliminate Condensation on Windows

  • Exhaust fans. Installing exhaust fans in humidity hotspots including 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 elevate the humidity level inside your home.
  • Ceiling fans. Turning on ceiling fans can also keep air swirling inside the home so humid air doesn’t get trapped in one place.
  • Opening up window treatments. Throwing open the blinds or drapes can reduce condensation by stopping the damp air from being stuck against the windowpane.

By lowering humidity in your home and dispersing air throughout your home, you can make the most of clear, moisture-free windows even in the middle of the winter.