How to stop condensation on windows is a frequently asked question, especially during winter. We’ve all woken up at some point to find the inside of windows to be wet with condensation. It not only affects visibility but can also lead to mould growth, damage to window frames, and overall discomfort in your home.
In this article we’ll cover:
What causes condensation on windows
How to stop condensation on your windows
We’ll talk about condensation on both the inside and outside of windows (because these are different problems), and offer practical solutions to prevent it.
What Causes Condensation on Windows?
Condensation forms when warm, moist air comes into contact with a cold surface, such as a window.
The temperature difference causes the moisture in the air to cool and turn into liquid droplets on the glass.
Several factors contribute to this:
High Humidity Levels Indoors:
Activities like cooking, showering, and drying clothes indoors increase humidity, which can lead to condensation inside windows.
Poor Ventilation:
Lack of air circulation prevents moist air from escaping, leading to condensation buildup on windows.
Cold Outdoor Temperatures:
In winter, windows are typically colder than the inside air, making condensation more likely.
Inefficient Windows:
Older, single-glazed windows allow more heat loss, which exacerbates condensation problems.
How to Stop Condensation on Windows
There are several methods to stop condensation on windows, both on the inside and outside.
By addressing humidity levels, improving ventilation, and upgrading insulation, you can significantly reduce the occurrence of window condensation.
How to Stop Condensation Inside Windows
Condensation inside windows is a common issue, especially in the colder months.
As the day goes on, the condensation inside windows can drop down and form a wet pool on the inside of the sill – which could cause damp and mould over the longer term.
Let’s go into what you should do to prevent it.
Condensation inside windows: how to prevent it
Here are effective solutions to tackle it:
1. Improve Ventilation:
Proper ventilation is key to reducing indoor humidity. Use extractor fans in bathrooms and kitchens to expel moist air directly outside. Leaving windows open slightly or installing trickle vents can also help improve air circulation.
2. Use a Dehumidifier:
A dehumidifier helps to lower indoor humidity levels, making it less likely for condensation to form on windows. Place it in rooms with high humidity, such as the kitchen, bathroom, or laundry room.
3. Dry Clothes Outdoors:
Avoid drying clothes indoors, as this adds significant moisture to the air. If drying indoors is unavoidable, ensure the room is well-ventilated or use a dehumidifier.
4. Install Double or Triple Glazing:
Double glazed windows are more efficient at maintaining indoor temperatures. They reduce the temperature difference between the inside air and the glass, minimizing condensation.
5. Leave Windows Open Overnight: One way to stop condensation on windows overnight is by leaving a small gap in your windows to allow moist air to escape while you sleep.
6. Use Longer Curtains or Blinds Wisely:
While longer curtains can help retain heat, they may also trap moisture against windows. Consider adjusting your curtains or blinds to allow some airflow between them and the window.
How to Stop Condensation on the Outside of Windows
While condensation on the outside of windows isn’t typically a problem for your home, it can obstruct your view.
Why external condensation happens
External condensation happens when the outside surface of the window is cooler than the dew point of the air. Here’s how to manage it:
Ensure Good Insulation:
Well-insulated windows are less likely to develop condensation on the exterior. If you notice frequent external condensation, it may be time to upgrade your window insulation.
Use Water-Repellent Coatings:
Applying a hydrophobic coating to the exterior of your windows can help repel moisture and reduce condensation buildup.
Trim Vegetation Near Windows:
If trees or plants are too close to your windows, they can contribute to exterior condensation by limiting airflow. Trimming these back can help reduce the occurrence.
How to Prevent Condensation on Windows
Preventing window condensation requires ongoing efforts to maintain proper humidity levels and ventilation in your home. Here are some ways to keep condensation at bay:
How to Prevent Condensation on Windows in Winter
Winter is the most common time for condensation to form due to the stark temperature difference between indoor and outdoor air. Here’s how to stop condensation on windows in winter:
Maintain a Stable Indoor Temperature:
Keeping your home consistently warm prevents windows from cooling down too much. This reduces the likelihood of condensation forming.
Use Insulating Window Films:
These films act as an additional layer of insulation, making the windows warmer and less prone to condensation. They are especially useful for single-glazed windows.
Increase Ventilation:
Winter may make you reluctant to open windows, but doing so even for short periods can help reduce moisture buildup inside your home. Consider installing trickle vents, which allow air to circulate without fully opening windows.
How to Stop Condensation on Double Glazed Windows
Double glazed windows are designed to prevent condensation, but they aren’t immune to it, especially if there are issues with installation or damage.
Here are ways to prevent condensation on double-glazed windows:
Check Window Seals:
Broken or damaged seals in double-glazed windows can allow moisture to enter between the panes, leading to condensation. Inspect and replace faulty seals as needed.
Ensure Proper Ventilation:
Despite their efficiency, double-glazed windows still benefit from proper ventilation. Open windows or use extractor fans to allow humid air to escape, especially in rooms with higher moisture levels.
Use Thermal Curtains:
Thermal curtains can help keep warm air in, preventing windows from becoming too cold and attracting moisture. However, make sure these curtains aren’t blocking air circulation near the windows.
How to Get Rid of Condensation on Windows
If you already have condensation on your windows, here’s how to remove it effectively:
Wipe Windows Regularly:
Use a clean, dry cloth or window squeegee to remove moisture from the glass. This is a temporary solution but can prevent further issues like mold or damage to window frames.
Use Moisture Absorbers:
Place moisture-absorbing products like silica gel or specialized dehumidifying crystals near your windows to help soak up excess moisture.
Install Window Vents:
Installing trickle vents can help remove moisture from the air near the windows and reduce condensation buildup.
How to Stop Condensation on Car Windows
It’s not just homes where condensation can form on the inside or outside of windows!
Condensation on car windows is a common issue, especially during colder months.
Like homes, it occurs when the warm, moist air inside the vehicle comes into contact with cold glass. Here’s how you can prevent it:
Use the Defroster Setting
Turn on your car’s defroster to blow warm, dry air over the windows, which helps to evaporate moisture and clear condensation quickly. Many modern vehicles also have a rear window defroster for added convenience.
Keep Windows Clean
Dirty windows are more likely to accumulate moisture. Regularly clean the inside of your car windows with a glass cleaner to reduce condensation.
Crack a Window Open Slightly
Leaving a small gap in your window can improve air circulation, reducing moisture buildup inside your car.
This can be especially helpful when parked overnight.
Remember, this is only advice for helping to stop condensation on windows – you need to be aware of any security risk when it comes to leaving a window slightly open overnight.
Use Moisture Absorbers
Place moisture-absorbing products, such as silica gel or specially designed car dehumidifiers, inside the vehicle to prevent condensation from forming on the windows.
Why Do I Get Condensation Between Double Glazed Windows?
Condensation between the panes of double-glazed windows is a sign of a broken or damaged seal.
The seal is designed to keep the air between the glass layers dry, and when it fails, moisture can infiltrate the gap, leading to condensation.
Here’s why this happens and what to do:
Failed Seals:
Over time, the seals around double-glazed windows can deteriorate due to age, weather exposure, or improper installation.
Once the seal is broken, moisture gets trapped between the panes, causing fogging or condensation.
Temperature Fluctuations:
Rapid changes in temperature can cause the window seals to expand and contract, which can eventually lead to cracks or gaps that let moisture in.
What You Can Do:
Unfortunately, once condensation forms between double-glazed windows, the only long-term solution is to replace the sealed unit.
While temporary fixes like using a dehumidifier may help, replacing the affected window pane is the most effective way to resolve the issue and restore your window’s efficiency.
Condensation on windows: Why You Should Act Quickly
Keeping an eye on condensation issues in your home is essential.
These issues can lead to health problems, such as respiratory issues, and long-term structural damage to your home.
Addressing condensation as soon as you notice it will help prevent bigger problems in the future.
Conclusion
What causes window condensation and how to stop condensation on the inside and outside of windows is a common problem, especially during the colder months.
Cause and prevention
By understanding what causes condensation on windows and using the right solutions, such as improving ventilation, upgrading insulation, and controlling humidity levels, you can prevent or minimise condensation in your home.
Inside or outside of windows
Whether you’re dealing with condensation inside your windows or outside, taking the necessary steps can help preserve your windows and keep your home more comfortable.
By using methods like leaving a window open slightly, installing double glazing, or adding longer curtains strategically, you can effectively manage and prevent condensation.
