Condensation on double glazed windows is a familiar sight for many UK homeowners, especially as temperatures drop during autumn and winter. If your conservatory has started to resemble a steamy greenhouse, you’re not alone. Conservatories, with their large glass surfaces and temperature fluctuations, are prime candidates for this frustrating issue.
But don’t worry – this guide will walk you through everything you need to know about condensation on double glazed windows in conservatories. You’ll learn why it happens, the potential risks if left unchecked, and, most importantly, the practical steps you can take to prevent it.
Why does condensation form on double glazed windows?
Understanding the root cause of condensation can help you find the right solution. Here’s the science in simple terms:
Condensation forms when warm, moisture-laden air meets a cold surface – like your double glazed windows. The drop in temperature causes the moisture in the air to cool and condense into droplets. And voilà, you’ve got foggy windows.
Common causes of condensation in conservatories
1. Poor ventilation
Without proper airflow, moisture from day-to-day activities (like cooking, showering, or even houseplant watering) has nowhere to escape and builds up in confined spaces like a conservatory.
2. High humidity levels
Conservatories often trap humidity, especially with heat-insulating double glazing.
3. Underheated spaces
Conservatories not used year-round may be left colder than other parts of the home, causing warm indoor air to rapidly cool when it enters.
Types of condensation and what they mean
Before you tackle the problem, it’s important to identify what kind of condensation you’re dealing with.
1. Internal surface condensation
This is the most common type and forms on the inside of your double glazing. It’s often caused by factors homeowners can control, such as high indoor humidity or lack of ventilation. Thankfully, solutions like dehumidifiers and improved airflow can often remedy this.
2. Condensation between window panes
Condensation trapped between the panes of your double glazed windows is a serious issue. It usually signals seal failure, allowing air and moisture to seep inside. Unfortunately, this means your double glazing has lost its insulating properties and likely needs repairing or replacing.
3. External condensation
This forms on the exterior of the glass and, while it can be annoying, it’s actually a good sign. External condensation shows that your double glazing is working well – insulating your home and reducing the transfer of heat outside.
Dangers of persistent condensation
Leaving condensation unresolved can create more problems than steamy windows. Here’s why it’s important to address the issue quickly:
1. Mould and mildew
Condensation leads to moist conditions, creating the perfect breeding ground for mould and mildew. These unsightly fungi can grow on window frames, curtains, and even the walls of your conservatory.
2. Rotting window frames
Excess moisture can seep into wooden frames, causing them to rot over time. This not only damages the aesthetic of your conservatory but can also compromise its structural integrity.
3. Structural damage
Prolonged exposure to moisture can weaken the sealing and construction of your conservatory, potentially leading to costly repairs.
4. Health concerns
Mould spores can exacerbate allergies and respiratory problems, especially for those with asthma or sensitive immune systems. For households with children or the elderly, this can be particularly concerning.
How to prevent condensation on double glazed windows
Thankfully, there are several practical steps you can take to address condensation in your conservatory and reduce its appearance.
1. Improve airflow
- Install trickle vents: Many modern double glazed windows come with built-in trickle vents that allow a small amount of fresh air into your conservatory, without creating unwanted drafts.
- Open roof vents: If your conservatory roof has vents, keep them open periodically to encourage air circulation.
- Portable fans: Use fans to improve airflow if your conservatory lacks built-in ventilation.
2. Use a dehumidifier
A dehumidifier is a quick and effective way to remove excess moisture from the air. Look for models specifically designed for mid-sized spaces like conservatories.
3. Upgrade insulation
Conservatories with poorly insulated floors or roofs are more prone to creating cold surfaces. Upgrading the insulation in these areas can make a noticeable difference.
4. Replace damaged seals
If condensation is forming between your window panes, it’s time to replace the damaged seals. A professional glazier can reseal your windows and restore their insulating properties.
5. Switch to thermally efficient glazing
If your current windows are outdated, consider replacing them with modern thermally efficient double glazing. Not only can this reduce condensation, but it can also improve your conservatory’s energy efficiency.
When to consider a professional inspection
Sometimes condensation issues go beyond a quick fix. You may need to call in professionals if:
- You see condensation consistently forming between panes. This could indicate deeper structural or sealant issues.
- There’s persistent mould growth. It may have spread beyond the surfaces you can see.
- Your windows show signs of rot or significant wear. Repairing or replacing them can save you from bigger issues down the line.
Professional conservatory inspectors and glaziers can provide specific advice tailored to your home’s setup.
Say goodbye to steamy conservatory windows
Condensation on double glazed windows may be annoying, but it’s not an unsolvable problem. A few small adjustments – such as improving airflow, investing in a dehumidifier, or repairing window seals – can make all the difference.
Addressing the issue promptly will protect your conservatory, create a healthier home environment, and even improve your property’s value. If you suspect more serious problems, don’t hesitate to consult with a professional for peace of mind.
Start implementing these steps today and enjoy a clear, cosy conservatory all winter long!
