Foggy windows are a common issue that can generally be easily fixed. They are also a nuisance that can hinder visibility and make your home feel less inviting. Whether it’s condensation between double-pane windows or a single-pane window with moisture issues, addressing foggy windows is essential for maintaining a comfortable and aesthetically pleasing living space. 

Identify the cause

Before finding the best solution, it is important to understand why your windows are fogging up. The most common reasons are:


  • Seal failure: Double-pane windows can get foggy if the seal is broken or deteriorated, as it allows moisture to seep between the panes, causing condensation.
  • Poor ventilation: Inadequate ventilation can lead to excess humidity indoors, resulting in condensation on windows. 
  • High humidity levels: In some cases, particularly in bathrooms or kitchens, elevated humidity levels can lead to foggy windows. 


If the seal needs to be repaired or replaced, there are two options:


Window seal repair: 

The repair process involves drilling a small hole in the bottom corner of the exterior glass and one in the opposite corner. Cleaning solutions are then spayed in-between the panes of glass to clean out staining and prepare the unit. We then use a drying agent to help evaporate the moisture which helps restore the insulating values back to the original of the unit. We then install a value in the top to allow any remaining moisture to evaporate and vent it self out of the unit the until it is completely dry. This can take a few weeks to complete. This defogging repair process comes with a 10 year money back warranty which is transferrable to any new owners as well.


Window replacement: 

When a seal failure occurs in a window, it can cause a number of issues such as fogging, condensation, and reduced energy efficiency. Some sealed units, cannot be repaired if there is too much staining in-between the unit or if there is an extensive sealed failure like a delimitation. In cases like this we can quickly and easily replace the glass sealed unit or the full window. Replacing the sealed unit is a cheaper alternative to full window replacement as it’s less than half the cost and the new units come with a 20 year warranty. We can also upgrade your units to new energy efficient LoE units which are over twice as energy efficient as most older clear units in home.


Adequate ventilation is critical for maintaining optimal humidity levels in your home. Consider the following strategies:


  • Leave blinds and/or drapes open: as wide as possible at night and open all window coverings during the day. This will increase the warm air circulation over the cool surface and increase the temperature of the glass.
  • Check the furnace filter and replace if dirt: A dirty furnace filter will reduce the output of the furnace fan. A clean filter will ensure maximum flow.
  • Turn your humidifier off during the winter: and anytime the temperature falls below 0 degrees C. A dehumidifier can effectively control indoor humidity levels, especially in basements or areas prone to excess moisture
  • Use exhaust fans: Install exhaust fans in high-humidity areas like bathrooms and kitchens to expel moisture-laden air.



If your windows are consistently fogging from the inside, it may be time to consider replacing the window to a more energy efficient window. While they can be repaired (de-fogged is only when moisture is inside a sealed unit, on moisture you can wipe off), replacing your windows may be the better option if your windows continue to become foggy. Replacing existing windows with high energy efficient new windows. 


Talk to a professional

If you are still determining the root cause of your foggy windows, or if a DIY sounds too risky, it is best to consult a professional. A skilled window technician can assess the situation and recommend the most appropriate course of action.


Foggy windows can be a persistent problem; with the right approach, you can restore clarity to your view and improve the overall comfort of your home. By identifying the root cause and implementing the appropriate solutions, you will be able to enjoy clear, crisp windows year-round. Don’t let foggy windows cloud your living space!


If you are looking for foggy window solutions, Go-Green Windows has you taken care of. We are a local, family-owned business that respects the environment. By choosing Go-Green, you can be confident that our industry experience and high-quality products will help save you money with energy efficiency and add comfort to your home for years to come. Get in touch with us today to get started.