Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows throughout your home are a gateway to the outdoors, a way to draw light in as you appreciate the view of your garden, yard or scenery. The last thing you want to see is a sweaty window covered in a film of condensation.

Not only are windows plastered with condensation unsightly, they also can be evidence of a more serious air-quality issue in your home. Fortunately, there’s numerous things you can try to resolve the problem.

What Produces Condensation along Windows

Condensation on the inner layer of windows is formed by the moist warm air inside your home mixing with the cold surface of the windows. It’s especially prevalent around the winter when it’s much cooler outside than it is inside 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 versus moisture in between the windowpanes. One is an air-quality issue and the other is a window issue.

  • Moisture on the inside of a window is created from the warm damp air inside your home forming against the glass.
  • Any moisture you find 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 should be repaired or replaced.
  • Condensation on the inside of the windows isn’t a window situation and can instead be fixed by changing the humidity in your home. Many things produce humidity throughout a home, like showers, cooking, bathing or even breathing.

Why Condensation on Windows Can Be a Problem

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

How to Reduce Humidity Throughout Your Home

Not to worry, because there are various options for eliminating moisture from the air inside your home.

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

If you don’t have a humidifier running and your home’s humidity level is high, consider purchasing a dehumidifier. While humidifiers add moisture into your home so the air doesn’t become too dry, a dehumidifier pulls excess moisture out of the air.

Compact, portable dehumidifiers can remove the water from one room. However, portable units require emptying water trays and generally service a somewhat limited area. A whole-house dehumidifier will eliminate moisture throughout your entire home.

Whole-house dehumidifier systems are controlled by a humidistat, which permits you to set a humidity level the same as you would pick a temperature on your thermostat. The unit will start immediately when the humidity level exceeds the set level. These systems work with your home’s HVAC system, so you should contact qualified professionals for whole-house dehumidifier installation Genoa.

Alternative Ways to Reduce Condensation on Windows

  • Exhaust fans. Adding exhaust fans around humidity hotspots like the bathroom, laundry room or above the oven can help by drawing the warm, moist air from these areas out of your home before it can increase the humidity level throughout your home.
  • Ceiling fans. Turning on ceiling fans can also keep air circulating within the home so humid air doesn’t get stuck in one area.
  • Opening your window treatments. Throwing open the blinds or drapes can lower condensation by stopping the warm air from being stuck against the windowpane.

By lowering humidity across your home and dispersing air throughout your home, you can enjoy clear, moisture-free windows even in the winter.