Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

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

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

What Creates Condensation in Windows

Condensation on the inside of windows is created by the moist warm air throughout your home mixing with the cold surface of your windows. It’s especially prevalent during the winter when it’s much chillier outside than it is in your home.

Inside Moisture vs. In Between Panes

When talking about condensation, it’s important to understand the difference 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 created from the warm damp air inside your home condensing against the glass.
  • The moisture you find between windowpanes is caused when the window seal stops working and moisture gets in between the two panes of glass, and at that point the window has to be repaired or replaced.
  • Condensation in the windows isn’t a window problem and can instead be fixed by fine-tuning the humidity in your home. Different things produce humidity inside a home, including showers, cooking, taking a bath or even breathing.

Why Condensation on Windows Can Be a Problem

Even though you might consider condensation on the inside of your windows is a cosmetic issue, it could also be indicating your home has higher humidity. If this is the case, water could also be accumulating 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 Reduce Humidity Throughout Your Home

Thankfully there are numerous options for removing moisture from the air in your home.

If you have a humidifier operating within your home – whether it be a small 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 excessive, look into getting a dehumidifier. While humidifiers add 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 remove the water from an entire room. However, these units require clearing water trays and most often service a small area. A whole-house dehumidifier will remove moisture from your entire home.

Whole-house dehumidifier systems are managed by a humidistat, which enables you to establish a humidity level the same as you would pick a temperature with your thermostat. The unit will start instantly when the humidity level surpasses the set level. These systems work with your home’s HVAC system, so you should contact qualified professionals for whole-house dehumidifier installation Libertyville.

Additional Ways to Eliminate Condensation on Windows

  • Exhaust fans. Putting in exhaust fans near humidity hotspots such as the bathroom, laundry room or above the oven can help by pulling the warm, moist air from these areas out of your home before it can increase the humidity level inside your home.
  • Ceiling fans. Turning on ceiling fans can also keep air swirling throughout the home so humid air doesn’t get caught up in one area.
  • Opening up window treatments. Throwing open the blinds or drapes can lower condensation by stopping the damp air from being trapped against the windowpane.

By lowering humidity inside your home and dispersing air throughout your home, you can make the most of clear, moisture-free windows even during the winter.