Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows of your home are a gateway to the outdoors, a way to let light in as you enjoy the view of your garden, yard or landscape. The last thing you need to see is a sweaty window plastered in a coating of condensation.

Not only are windows plastered with condensation unappealing, they also can be a symptom of a more serious air-quality deficit inside your home. Fortunately, there’s several things you can try to resolve the problem.

What Creates Condensation in Windows

Condensation on the inside of windows is produced by the humid warm air inside your home mixing with the colder surface of your windows. It’s particularly prevalent during the winter when it’s much cooler outside than it is within your home.

Inside Moisture vs. In Between Panes

When discussing condensation, it’s important to know the distinction between moisture on the inside of your windows in comparison to moisture in between the windowpanes. One is an indoor air quality issue and the other is a window issue.

  • Moisture inside a window is produced from the warm damp air inside your home forming on the glass.
  • Existing moisture you find between windowpanes is caused when the window seal breaks down and moisture seeps 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 fixed by changing the humidity in your home. Numerous things generate humidity in a home, like showers, cooking, laundry or even breathing.

Why Condensation on Windows Can Be a Problem

Even though you might consider condensation on the inside of your windows is a cosmetic issue, it could also be a sign 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, increasing the growth of mildew or mold.

How to Lower Humidity in Your Home

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

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

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

Compact, portable dehumidifiers can absorb the water from an entire room. However, these units require emptying water trays and most often service a fairly small area. A whole-house dehumidifier will extract moisture across your entire home.

Whole-house dehumidifier systems are managed by a humidistat, which allows you to set a humidity level the same as you would select a temperature on your thermostat. The unit will start instantly when the humidity level overtakes the set level. These systems work with your home’s HVAC system, so you will want to contact qualified professionals for whole-house dehumidifier installation Middletown.

Additional Ways to Lower Condensation on Windows

  • Exhaust fans. Adding exhaust fans in humidity hotspots such as the bathroom, laundry room or above the kitchen range can help by pulling the warm, humid air from these rooms out of your home before it can increase the humidity level throughout your home.
  • Ceiling fans. Spinning ceiling fans can also keep air circulating throughout the home so humid air doesn’t get stuck in one place.
  • Opening up window treatments. Throwing open the blinds or drapes can lower condensation by preventing the warm air from being stuck 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 middle of the winter.