Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows of your home open up to the outdoors, a way to draw light in when you appreciate the view of your garden, yard or other surroundings. The last thing you would want to see is a sweaty window plastered in a film of condensation.

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

What Produces Condensation on Windows

Condensation on the inside of windows is created by the humid warm air throughout your home reaching the cooler surface of your windows. It’s especially prevalent around the winter when it’s much chillier outside than it is inside your home.

Inside Moisture vs. In Between Panes

When talking about condensation, it’s necessary to understand the distinction between moisture on the inside of your windows in comparison to moisture in between the windowpanes. One is an air-quality issue and the other is a window issue.

  • Moisture within a window is caused from the warm moist air throughout your home collecting against the glass.
  • Any moisture you see between windowpanes is produced when the window seal stops working and moisture slips between the two panes of glass, in which case the window has to be repaired or replaced.
  • Condensation on the inside of the windows isn’t a window issue and can instead be resolved by fine-tuning the humidity inside your home. Many things cause humidity throughout a home, including showers, cooking, bathing or even breathing.

Why Condensation on Windows Can Be Trouble

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

How to Decrease Humidity in Your Home

Fortunately there are numerous options for extracting moisture from the air in your home.

If you have a humidifier running inside 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 going and your home’s humidity level is excessive, consider installing a dehumidifier. While humidifiers put moisture in your home so the air doesn’t become too dry, a dehumidifier extracts excess moisture out of the air.

Small, portable dehumidifiers can absorb the water from an entire room. However, portable units require emptying water trays and generally service a small area. A whole-house dehumidifier will remove moisture throughout your entire home.

Whole-house dehumidifier systems are managed by a humidistat, which allows you to establish a humidity level precisely as you would choose a temperature with your thermostat. The unit will run automatically when the humidity level exceeds the set level. These systems collaborate with your home’s HVAC system, so you will receive the best results if you contact experienced professionals for whole-house dehumidifier installation Excelsior Springs.

Additional Ways to Eliminate Condensation on Windows

  • Exhaust fans. Installing exhaust fans near humidity hotspots such as the bathroom, laundry room or above the stove can help by pulling the warm, humid air from these spaces out of your home before it can raise the humidity level in your home.
  • Ceiling fans. Spinning ceiling fans can also keep air moving within the home so humid air doesn’t get stuck in one spot.
  • Opening up window treatments. Pulling open the blinds or drapes can decrease condensation by stopping the warm air from being stuck against the windowpane.

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