Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows in your home are a gateway to the outdoors, a way to allow light in while you enjoy the view of your garden, yard or landscape. The last thing you need to see is a sweaty window plastered in a coating of condensation.

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

What Produces Condensation in Windows

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

Inside Moisture vs. In Between Panes

When discussing condensation, it’s crucial to know the contrast 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 inside a window is produced from the warm moist air inside your home forming along the glass.
  • The moisture you notice between windowpanes is caused when the window seal stops working and moisture slips between the two panes of glass, in which case the window should be repaired or replaced.
  • Condensation in the windows isn’t a window problem and can instead be resolved by changing the humidity across your home. Numerous things produce humidity inside a home, including showers, cooking, laundry or even breathing.

Why Condensation on Windows Can Be Trouble

Though you might think condensation inside your windows is a cosmetic concern, it can be a sign your home has high humidity. If that’s the case, water may also be condensing on window frames, cold walls or other surfaces. Even a thin film of water can cause wood surfaces to mildew or rot over time, increasing the growth of mildew or mold.

How to Lower Humidity Throughout Your Home

The good news is there are numerous options for extracting moisture from the air in your home.

If you have a humidifier operating in 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, look into installing a dehumidifier. While humidifiers put moisture inside your home so the air doesn’t get too dry, a dehumidifier extracts excess moisture out of the air.

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

Whole-house dehumidifier systems are controlled by a humidistat, which allows you to set a humidity level precisely as you would pick a temperature with your thermostat. The unit will begin running 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 skilled professionals for whole-house dehumidifier installation Winnipeg.

Alternative Ways to Decrease Condensation on Windows

  • Exhaust fans. Putting in exhaust fans near humidity hotspots like the bathroom, laundry room or above the oven can help by pulling the warm, humid air from these rooms out of your home before it can increase the humidity level throughout your home.
  • Ceiling fans. Running ceiling fans can also keep air swirling throughout the home so humid air doesn’t get stuck in one area.
  • Open window treatments. Opening the blinds or drapes can lower condensation by stopping the damp air from being stuck against the windowpane.

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