Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows throughout your home open up to the outdoors, a way to let light in when you take in the view of your garden, yard or landscape. The last thing you would want to see is a sweaty window coated in a film of condensation.

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

What Creates Condensation on Windows

Condensation on the interior of windows is created by the moist warm air inside your home mixing with the cold surface of your windows. It’s particularly prevalent during the winter when it’s much chillier outside than it is within your home.

Inside Moisture vs. In Between Panes

When talking about condensation, it’s important to know the difference 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 within a window is caused from the warm moist air throughout your home condensing against the glass.
  • Existing moisture you see between windowpanes is produced when the window seal fails and moisture slips between the two panes of glass, in which case the window needs to be repaired or replaced.
  • Condensation inside the windows isn’t a window problem and can instead be solved by adjusting the humidity in your home. Different things generate humidity throughout a home, like showers, cooking, bathing or even breathing.

Why Condensation on Windows Can Be Trouble

Even though you might presume condensation on the inside of your windows is a cosmetic concern, it could also be indicating your home has excess humidity. If this is the case, water could also be collecting on window frames, cold walls or other surfaces. Even a slim film of water can encourage wood surfaces to mildew or rot over time, fostering the growth of mildew or mold.

How to Reduce Humidity in Your Home

Thankfully there are several options for eliminating moisture from the air inside your home.

If you have a humidifier active within 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, look into getting a dehumidifier. While humidifiers introduce moisture in your home so the air doesn’t dry out, a dehumidifier extracts excess moisture out of the air.

Smaller, portable dehumidifiers can remove the water from an entire room. However, portable units require emptying out water trays and usually 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 allows you to set a humidity level the same as you would choose a temperature on your thermostat. The unit will begin running instantly when the humidity level surpasses the set level. These systems coordinate with your home’s HVAC system, so you will receive the best results if you contact skilled professionals for whole-house dehumidifier installation Greensburg.

Additional Ways to Lower Condensation on Windows

  • Exhaust fans. Adding exhaust fans around humidity hotspots including the bathroom, laundry room or above the oven can help by drawing the warm, moist air from these areas out of your home before it can elevate the humidity level across your home.
  • Ceiling fans. Turning on ceiling fans can also keep air circulating throughout the home so humid air doesn’t get trapped in one spot.
  • Open window treatments. Pulling open the blinds or drapes can decrease condensation by preventing the humid air from being trapped against the windowpane.

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