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 draw light in as you take in the view of your garden, yard or landscape. The last thing you need to see is a sweaty window plastered in a layer of condensation.

Not only are windows covered in condensation unattractive, they also can be a symptom of a more substantial air-quality deficit throughout your home. Luckily, there’s several things you can try to address the problem.

What Causes Condensation along Windows

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

Inside Moisture vs. In Between Panes

When talking about condensation, it’s important to recognize the distinction between moisture on the inside of your windows versus 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 throughout your home collecting against the glass.
  • The moisture you find between windowpanes is formed when the window seal fails and moisture seeps between the two panes of glass, in which case 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 adjusting the humidity inside your home. Different things generate humidity throughout a home, like showers, cooking, laundry or even breathing.

Why Condensation on Windows Can Be a Problem

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

How to Decrease 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 operating inside 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 higher than you prefer, consider getting a dehumidifier. While humidifiers add moisture in your home so the air doesn’t get too dry, a dehumidifier extracts excess moisture out of the air.

Small, portable dehumidifiers can absorb the water from one room. However, these units require clearing water trays and generally service a small area. A whole-house dehumidifier will extract moisture across your entire home.

Whole-house dehumidifier systems are controlled by a humidistat, which enables you to set a humidity level precisely as you would choose a temperature with your thermostat. The unit will begin running automatically when the humidity level overtakes the set level. These systems coordinate with your home’s HVAC system, so you should contact skilled professionals for whole-house dehumidifier installation Racine.

Additional Ways to Decrease Condensation on Windows

  • Exhaust fans. Putting in exhaust fans in humidity hotspots such as the bathroom, laundry room or above the stove can help by pulling the warm, humid air from these areas out of your home before it can raise the humidity level throughout your home.
  • Ceiling fans. Turning on ceiling fans can also keep air flowing inside the home so humid air doesn’t get trapped in one area.
  • Opening up window treatments. Opening the blinds or drapes can reduce condensation by preventing the warm air from being trapped against the windowpane.

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