Why Your Windows Are Sweating Indoors and How to Fix It

September 27, 2022

The windows of your home open up to the outdoors, a way to allow light in when you appreciate the view of your garden, yard or landscape. The last thing you would want to see is a sweaty window coated in a film of condensation.

Not only are windows coated in condensation unsightly, they also can be a sign of a more serious air-quality deficit throughout your home. Fortunately, there’s numerous things you can try to correct the problem.

What Causes Condensation in Windows

Condensation on the inner layer of windows is produced by the damp warm air throughout your home hitting the cooler surface of your windows. It’s particularly common around the winter when it’s much chillier outside than it is within your home.

Inside Moisture vs. In Between Panes

When discussing condensation, it’s crucial to recognize the difference between moisture on the inside of your windows versus 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 moist air inside your home collecting along the glass.
  • Existing moisture you notice between windowpanes is caused when the window seal fails and moisture seeps between the two panes of glass, and by then the window has to be repaired or replaced.
  • Condensation in the windows isn’t a window issue and can instead be resolved by fine-tuning the humidity in your home. Many things produce humidity in a home, such as showers, cooking, taking a bath or even breathing.

Why Condensation on Windows Can Be an Issue

Although you might presume condensation on the inside of your windows is a cosmetic concern, it may also be evidence your home has high humidity. If this is the case, water could also be accumulating on window frames, cold walls or other surfaces. Even a small film of water can help 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 inside your home.

If you have a humidifier running within 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 active and your home’s humidity level is excessive, consider getting a dehumidifier. While humidifiers put moisture into your home so the air doesn’t become too dry, a dehumidifier extracts excess moisture out of the air.

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

Whole-house dehumidifier systems are controlled by a humidistat, which enables you to specify a humidity level just as you would select a temperature on your thermostat. The unit will start immediately when the humidity level overtakes the set level. These systems collaborate with your home’s HVAC system, so you will receive the best results if you contact qualified professionals for whole-house dehumidifier installation Lake Worth.

Other Ways to Lower Condensation on Windows

  • Exhaust fans. Putting in exhaust fans around humidity hotspots including the bathroom, laundry room or above the kitchen range can help by extracting the warm, moist air from these rooms out of your home before it can increase the humidity level in your home.
  • Ceiling fans. Turning on ceiling fans can also keep air moving within the home so humid air doesn’t get stuck in one area.
  • Opening your window treatments. Throwing open the blinds or drapes can decrease condensation by preventing the damp air from being stuck against the windowpane.

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