Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows of your home are a portal to the outdoors, a way to draw light in as you take in the view of your garden, yard or other surroundings. The last thing you want to see is a sweaty window covered in a layer of condensation.

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

What Causes Condensation on Windows

Condensation on the inner layer of windows is formed by the damp warm air in your home reaching the cooler surface of your windows. It’s particularly common around the winter when it’s much chillier outside than it is inside your home.

Inside Moisture vs. In Between Panes

When dealing with condensation, it’s important to recognize 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 inside a window is produced from the warm damp air throughout your home condensing along the glass.
  • Existing moisture you see between windowpanes is caused when the window seal fails and moisture gets in between the two panes of glass, and at that point the window should be repaired or replaced.
  • Condensation in the windows isn’t a window problem and can instead be fixed by changing the humidity inside your home. Numerous things produce humidity throughout a home, such as showers, cooking, taking a bath or even breathing.

Why Condensation on Windows Can Be Trouble

Although you might consider condensation in your windows is a cosmetic problem, it may also 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 thin film of water can encourage wood surfaces to mildew or rot over time, increasing the growth of mildew or mold.

How to Decrease Humidity Throughout Your Home

Fortunately there are numerous options for removing moisture from the air throughout your home.

If you have a humidifier active 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 higher than you prefer, think about getting a dehumidifier. While humidifiers add moisture in your home so the air doesn’t become too dry, a dehumidifier pulls excess moisture out of the air.

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

Whole-house dehumidifier systems are regulated by a humidistat, which permits you to set a humidity level precisely as you would pick a temperature on your thermostat. The unit will begin running immediately when the humidity level surpasses the set level. These systems work with your home’s HVAC system, so you will receive the best results if you contact experienced professionals for whole-house dehumidifier installation Gresham.

Other Ways to Reduce Condensation on Windows

  • Exhaust fans. Putting in exhaust fans around humidity hotspots including the bathroom, laundry room or above the stove can help by extracting the warm, moist air from these spaces out of your home before it can elevate the humidity level in your home.
  • Ceiling fans. Turning on ceiling fans can also keep air swirling throughout the home so humid air doesn’t get stuck in one area.
  • Opening your window treatments. Opening the blinds or drapes can reduce 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 make the most of clear, moisture-free windows even in the winter.