Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows in your home are a portal to the outdoors, a way to allow light in while you appreciate the view of your garden, yard or scenery. The last thing you want to see is a sweaty window coated in a coating of condensation.

Not only are windows covered in condensation unappealing, they also can be a sign of a more serious air-quality deficit throughout your home. Fortunately, there’s multiple things you can do to correct the problem.

What Produces Condensation in Windows

Condensation on the inner layer of windows is formed by the humid warm air inside your home reaching the cold surface of the windows. It’s particularly prevalent over the winter when it’s much chillier outside than it is inside your home.

Inside Moisture vs. In Between Panes

When dealing with condensation, it’s important to know 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 on the inside of a window is caused from the warm moist air throughout your home condensing along the glass.
  • Existing moisture you see between windowpanes is formed when the window seal stops working and moisture seeps between the two panes of glass, and at that point the window needs to be repaired or replaced.
  • Condensation inside the windows isn’t a window issue and can instead be fixed by changing the humidity in your home. Different things cause humidity throughout a home, including 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 evidence your home has higher humidity. If this is in fact the case, water may also be accumulating on window frames, cold walls or other surfaces. Even a thin film of water can cause wood surfaces to mildew or rot over time, promoting the growth of mildew or mold.

How to Reduce Humidity in Your Home

Fortunately there are various options for eliminating moisture from the air in your home.

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

If you don’t have a humidifier active and your home’s humidity level is higher than you prefer, consider installing a dehumidifier. While humidifiers add moisture into your home so the air doesn’t dry out, a dehumidifier draws excess moisture out of the air.

Small, portable dehumidifiers can eliminate the water from a single room. However, portable units require clearing water trays and usually service a 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 with your thermostat. The unit will run immediately when the humidity level exceeds the set level. These systems collaborate with your home’s HVAC system, so you will want to contact skilled professionals for whole-house dehumidifier installation Grand Prairie.

Additional Ways to Eliminate Condensation on Windows

  • Exhaust fans. Putting in exhaust fans near 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 across your home.
  • Ceiling fans. Spinning ceiling fans can also keep air flowing throughout the home so humid air doesn’t get caught up in one area.
  • Opening up window treatments. Throwing open the blinds or drapes can decrease condensation by preventing the humid air from being stuck against the windowpane.

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