Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows in your home open up to the outdoors, a way to let light in as you appreciate the view of your garden, yard or other surroundings. The last thing you need to see is a sweaty window coated in a film of condensation.

Not only are windows coated in condensation unattractive, they also can be a sign of a more substantial air-quality problem within your home. Fortunately, there’s numerous things you can do to resolve the problem.

What Causes Condensation in Windows

Condensation on the interior of windows is produced by the moist warm air inside your home hitting the colder surface of the windows. It’s notably common during the winter when it’s much cooler outside than it is in your home.

Inside Moisture vs. In Between Panes

When dealing with 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 on the inside of a window is produced from the warm moist air throughout your home forming on the glass.
  • Any moisture you see between windowpanes is formed when the window seal fails and moisture seeps between the two panes of glass, and at that point the window has to be repaired or replaced.
  • Condensation inside the windows isn’t a window situation and can instead be fixed by adjusting the humidity across your home. Numerous things generate humidity inside a home, including showers, cooking, taking a bath or even breathing.

Why Condensation on Windows Can Be an Issue

Even though you might think condensation inside your windows is a cosmetic issue, it could also be a sign your home has high humidity. If this is the case, water could also be accumulating on window frames, cold walls or other surfaces. Even a thin film of water can help wood surfaces to mildew or rot over time, promoting the growth of mildew or mold.

How to Reduce Humidity Throughout Your Home

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

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

If you don’t have a humidifier going and your home’s humidity level is excessive, look into purchasing 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.

Smaller, portable dehumidifiers can remove the water from an entire room. However, portable units require clearing water trays and most often service a fairly small area. A whole-house dehumidifier will extract moisture throughout your entire home.

Whole-house dehumidifier systems are controlled by a humidistat, which enables you to set a humidity level just as you would select a temperature with your thermostat. The unit will run immediately when the humidity level exceeds the set level. These systems coordinate with your home’s HVAC system, so you will want to contact skilled professionals for whole-house dehumidifier installation Norton.

Other Ways to Lower Condensation on Windows

  • Exhaust fans. Putting in exhaust fans around humidity hotspots like the bathroom, laundry room or above the oven can help by pulling the warm, humid air from these spaces out of your home before it can elevate the humidity level inside your home.
  • Ceiling fans. Spinning ceiling fans can also keep air swirling within the home so humid air doesn’t get trapped in one area.
  • Opening up window treatments. Opening the blinds or drapes can decrease condensation by preventing the warm air from being trapped against the windowpane.

By lowering humidity across your home and circulating air throughout your home, you can make the most of clear, moisture-free windows even during the winter.