Window Condensation Prevention: How to Keep Your Windows Clear and Dry
- Filus.

- 15 hours ago
- 4 min read
If you’ve ever noticed water droplets forming on your windows, you’re not alone. Condensation on windows is a common issue, especially in homes across SW London and Surrey where the weather can be quite damp. It’s not just annoying to see foggy glass; it can also lead to problems like mould, damage to window frames, and even affect your home’s energy efficiency. But don’t worry - I’m here to share some practical tips and friendly advice to help you prevent condensation on your windows and keep your home comfortable and dry.
Understanding Window Condensation Prevention
Before diving into solutions, it’s helpful to understand why condensation happens. When warm, moist air inside your home meets the cold surface of a window, the moisture in the air cools down and turns into water droplets. This is especially common in winter or on rainy days when the temperature difference between inside and outside is greater.
Condensation is more likely to occur if your home has poor ventilation or if there’s a lot of moisture being produced inside. Cooking, showering, drying clothes indoors, and even breathing all add moisture to the air. Without proper airflow, this moisture has nowhere to go but to settle on cold surfaces like windows.
Here are some key factors that contribute to window condensation:
High indoor humidity levels
Poor ventilation or lack of air circulation
Single-glazed or older windows with poor insulation
Cold window frames or poorly sealed windows
Understanding these factors is the first step to tackling the problem effectively.

Practical Tips for Window Condensation Prevention
Now that we know why condensation happens, let’s look at some easy and effective ways to prevent it. These tips are designed to fit into your daily routine and home setup without much hassle.
1. Improve Ventilation
One of the best ways to reduce condensation is to let fresh air circulate. Opening windows for a few minutes each day can make a big difference. If you have extractor fans in your kitchen or bathroom, use them regularly to remove moist air.
Open windows slightly while cooking or showering
Use extractor fans or install them if you don’t have any
Consider trickle vents on your windows to allow constant airflow
2. Control Indoor Humidity
Keeping indoor humidity levels between 40% and 60% helps prevent condensation. You can measure humidity with an inexpensive hygrometer. If levels are too high, try these steps:
Use a dehumidifier in damp rooms
Avoid drying clothes indoors or use a tumble dryer with an external vent
Cover pots when cooking to reduce steam
3. Upgrade Your Windows
Older windows, especially single-glazed ones, are more prone to condensation because they don’t insulate well. Upgrading to double or triple-glazed uPVC windows can help keep the glass warmer and reduce moisture buildup.
Choose windows with good thermal insulation ratings
Ensure windows are properly sealed to prevent cold air leaks
Consider custom-made uPVC windows designed for your home’s needs
If you want to explore more about window condensation solutions, there are specialist options available that can be tailored to your home.
How Window Frames Affect Condensation
You might not realise it, but the type of window frame you have can impact condensation levels. Wooden frames, for example, can absorb moisture and may warp or rot if condensation is frequent. uPVC frames, on the other hand, are more resistant to moisture and easier to maintain.
Here’s what to consider about window frames:
Material: uPVC frames are low maintenance and better at resisting moisture.
Sealing: Check that seals around the frame are intact to prevent cold air from entering.
Installation: Proper installation ensures no gaps where cold air can cause condensation.
Upgrading to custom-made uPVC windows with high-quality frames can be a smart investment for long-term condensation prevention and energy efficiency.

Simple Daily Habits to Keep Windows Dry
Sometimes, small changes in your daily habits can make a big difference in preventing window condensation. Here are some easy things you can do every day:
Wipe down windows: If you notice moisture, gently wipe it away with a cloth to prevent mould growth.
Keep furniture away from windows: This allows air to circulate freely around the glass.
Use curtains wisely: Open curtains during the day to let sunlight warm the windows, but close them at night to keep heat inside.
Maintain heating: Keep your home at a consistent temperature to avoid cold spots where condensation can form.
By adopting these habits, you’ll create a healthier environment and protect your windows from damage.
When to Seek Professional Help
If you’ve tried these tips and still struggle with persistent condensation, it might be time to get expert advice. Professionals can assess your home’s ventilation, insulation, and window condition to recommend the best course of action.
They can suggest custom window solutions tailored to your home’s specific needs.
They can identify hidden issues like leaks or poor seals.
They can install high-quality uPVC windows that combine style, durability, and condensation resistance.
Choosing a trusted local specialist ensures you get personalised service and products that last. This is especially important in SW London and Surrey, where weather conditions can be challenging.
Keeping Your Home Comfortable and Condensation-Free
Preventing condensation on your windows is all about balancing moisture and airflow. With a few simple changes and the right window upgrades, you can enjoy clearer views, a healthier home, and better energy efficiency.
Remember, it’s not just about fixing the problem when it appears but creating an environment that stops condensation before it starts. Whether it’s improving ventilation, controlling humidity, or investing in custom-made uPVC windows, every step counts.
If you want to explore professional window condensation solutions that fit your home perfectly, don’t hesitate to reach out to local experts who understand the unique needs of homes in SW London and Surrey.
Stay warm, dry, and comfortable - your windows will thank you!










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