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 allow light in while you take in the view of your garden, yard or scenery. The last thing you need to see is a sweaty window plastered in a coating of condensation.

Not only are windows covered in condensation unattractive, they also can be a symptom of a more serious air-quality deficit within your home. Thankfully, there’s numerous things you can try to resolve the problem.

What Causes Condensation along Windows

Condensation on the inside of windows is formed by the moist warm air throughout your home reaching the colder surface of your windows. It’s notably common over the winter when it’s much chillier outside than it is within your home.

Inside Moisture vs. In Between Panes

When talking about condensation, it’s crucial to understand the distinction 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 inside a window is produced from the warm humid air throughout your home forming on the glass.
  • Any moisture you see between windowpanes is formed when the window seal stops working and moisture gets in between the two panes of glass, in which case the window needs to be repaired or replaced.
  • Condensation on the inside of the windows isn’t a window issue and can instead be resolved by adjusting the humidity inside your home. Numerous things cause humidity inside a home, such as showers, cooking, bathing or even breathing.

Why Condensation on Windows Can Be an Issue

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

How to Lower Humidity Inside Your Home

Thankfully there are various options for removing moisture from the air inside 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 goes down.

If you don’t have a humidifier going and your home’s humidity level is excessive, think about installing a dehumidifier. While humidifiers add moisture inside your home so the air doesn’t get too dry, a dehumidifier draws 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 usually service a somewhat limited area. A whole-house dehumidifier will eliminate moisture from your entire home.

Whole-house dehumidifier systems are regulated by a humidistat, which allows you to specify a humidity level just as you would pick a temperature with 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 Brookfield.

Alternative 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 extracting the warm, moist air from these rooms out of your home before it can elevate the humidity level throughout your home.
  • Ceiling fans. Running ceiling fans can also keep air circulating within the home so humid air doesn’t get caught up in one place.
  • Opening up window treatments. Opening the blinds or drapes can decrease condensation by preventing the warm air from being stuck against the windowpane.

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