Condensation occurs when warm, humid air comes in contact with a cold surface, leaving water droplets behind. While window condensation from time to time is inevitable, especially in a tightly sealed, efficient home, frequent condensation can lead to mold or mildew growth, which can lead to structural concerns or health issues.
If you struggle with window condensation, keep reading to learn the most common causes of indoor and outdoor moisture buildup on your windows and discover how to keep it from getting the best of your home!
What Causes Indoor Window Condensation?
Condensation on the inside of windows occurs most frequently in winter when the cold, dry air outdoors is much cooler than your home’s indoor temperature. The warm indoor air, combined with the humidity created from daily activities like cooking and showering, will form condensation when it comes in contact with your cold windows.
How to Prevent Indoor Window Condensation
The key to reducing indoor window condensation during the winter months is to decrease the humidity levels inside your home. Here are some ideas to mitigate the effects of condensation inside:
Use Dehumidifiers
Dehumidifiers are popularly used to prevent mold and mildew growth and diminish musty odors. However, since these appliances reduce humidity levels, they’re also an excellent investment for reducing condensation buildup on windows and walls during winter.
Install a dehumidifier in your home’s most humid rooms, like the bathrooms and the kitchen, to prevent moisture buildup on windows. Whole-home dehumidifiers that integrate with your HVAC system are also great solutions if you struggle with persistent condensation.
Run Exhaust Fans
Whenever you do something inside your home that releases hot steam, such as boiling water or taking a shower, moisture is released into the air. This moisture, plus the elevated temperature inside your house, will cause condensation to form on cold windows.
Rather than allowing moisture to collect on your windows, help it escape by running the exhaust fans in your kitchen and bathrooms. Keep the exhaust fan above your stove on while cooking, and run the bathroom fans during and after your shower until the room feels completely dry.
Circulate Air
Keeping the air moving throughout your home can prevent humidity from building up in one or two rooms, causing condensation on those windows.
If it’s not too cold outside, cracking open your windows or doors is one of the best (and fastest!) ways to allow humidity to escape. However, if it is too chilly to open the windows, keeping your ceiling fans on to encourage the warm air to circulate throughout your home is the next best option. Since warm air rises, ceiling fans actually help to push the warm air down, which, in turn, can keep your home warmer in the winter.
What Causes Outdoor Window Condensation?
Unlike indoor window condensation, which occurs in the winter, outdoor window condensation typically occurs during warm, humid summers, when the surface of your windows is cooler than the dew point outside. This means that dew (condensation) will form when it comes in contact with your home’s cool windows.
How to Prevent Outdoor Window Condensation
You’ll most likely see condensation on the outside of your windows right after you wake up on a cool summer morning, but as the sun comes out and warms up the glass, the condensation will quickly evaporate by mid-to-late morning.
Though condensation on the outside of your windows should not be a cause for concern, here are some ideas for reducing outdoor window condensation if the moisture buildup on your panes obstructs your beautiful morning views.
Trim the Landscaping
Bushes or trees near your windows can trap in humidity and prevent air from circulating, keeping morning dew on your windows for longer.
Consider trimming landscaping near your windows to improve air circulation and allow the sunshine to reach your windows more quickly, warming up the glass and therefore causing the condensation to evaporate.
Apply a Water-Repellant Coating
Water-repellant coatings (hydrophobic glass coatings) are often used on windows that frequently encounter moisture, like car windows and shower doors.
However, if you live in a humid climate with cold winters and warm summers, applying a water-repellent coating to the outer surfaces of your windows can help to repel water, preventing condensation buildup on cool summer mornings.
Turn Up Your Home’s Temperature
If you keep your home very cool in the summer, your windows are more likely to develop condensation when warm outdoor air comes in contact with them. To minimize moisture buildup on the outside of your windows in the summer, consider turning up your A/C a couple of degrees, as long as it’s still comfortable inside.
Should I Be Concerned About Window Condensation?
As we mentioned earlier, condensation on the inside or outside of your windows is not bad in and of itself. It’s actually a sign of a well-insulated home, which means you won’t have to worry about high utility bills or uncomfortable drafts. As long as you control the humidity levels inside your home and encourage air circulation to prevent mold growth and moisture damage, there isn’t much else you need to do to “fix” window condensation.
There is, however, one type of condensation you should be worried about—condensation between your windowpanes.
If you notice fogginess between the panes in your multi-pane windows, this is a sign of seal failure. This means the insulating gases between your windows are leaking out and moisture is seeping in, which can cause draftiness, high utility bills, and moisture damage. Window seal failure cannot be controlled by external factors, like humidifiers or air circulation, and can only be remedied with a window replacement.
Install Beautiful, High-Performance Windows with JD Hostetter & Associates
Whether you’re dealing with window problems like rotted frames from excess condensation or fogginess between panes—our local installation team would be happy to help with all your window replacement needs.
Learn more about our window replacement services to discover the benefits of durable, lasting window replacement with JD Hostetter & Associates!
