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

Not only are windows coated in condensation unappealing, they also can be a symptom of a more serious air-quality issue inside your home. Thankfully, there’s numerous things you can attempt to correct the problem.

What Causes Condensation in Windows

Condensation on the inner layer of windows is created by the moist warm air inside your home mixing with the cold surface of your windows. It’s notably common during the winter when it’s much colder outside than it is inside your home.

Inside Moisture vs. In Between Panes

When talking about condensation, it’s crucial to recognize the difference 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 within a window is created from the warm humid air in your home forming along the glass.
  • Any moisture you see between windowpanes is caused 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 on the inside of the windows isn’t a window situation and can instead be resolved by changing the humidity across your home. Different things generate humidity inside a home, such as showers, cooking, laundry or even breathing.

Why Sweating Windows Could Mean an Issue

Although you might presume condensation inside your windows is a cosmetic problem, it may also be evidence your home has high humidity. If this is in fact the case, water might also be collecting on window frames, cold walls or other surfaces. Even a small film of water can help wood surfaces to mildew or rot over time, increasing the growth of mildew or mold.

How to Decrease Humidity in Your Home

Not to worry, because there are several options for extracting moisture from the air in your home.

If you have a humidifier active within 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 excessive, look into installing a dehumidifier. While humidifiers adds moisture inside your home so the air doesn’t get too dry, a dehumidifier draws excess moisture out of the air.

Compact, portable dehumidifiers can remove the water from a single room. However, those units require clearing water trays and usually service a fairly small area. A whole-house dehumidifier will eliminate moisture throughout your entire home.

Whole-house dehumidifier systems are controlled by a humidistat, which allows you to specify a humidity level just like you would select a temperature via your thermostat. The unit will run automatically when the humidity level overtakes the set level. These systems collaborate with your home’s HVAC system, so you will receive the best results if you contact skilled professionals for whole-house dehumidifier installation .

Alternative Ways to Decrease 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 pulling the warm, moist air from these rooms out of your home before it can elevate the humidity level in your home.
  • Ceiling fans. Running ceiling fans can also keep air flowing throughout the home so humid air doesn’t get stuck in one area.
  • Open window treatments. Throwing open the blinds or drapes can reduce condensation by preventing the warm air from being stuck against the windowpane.

By decreasing humidity across your home and circulating air throughout your home, you can enjoy clear, moisture-free windows even during the winter.