Introduction
Condensation in double glazing is one of the most common frustrations homeowners face. Whether it’s mist forming between the panes or water droplets gathering on the inside, condensation not only looks unsightly but can also signal deeper issues with your windows.
In this guide, we’ll explain what causes condensation in double glazing, how to prevent it, and what solutions work best for UK homes.
What Causes Condensation in Double Glazing?
Condensation forms when warm, moist air comes into contact with a cold surface. In double glazing, this can happen in three main ways:
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External condensation – usually harmless, appearing on the outside glass when outdoor air is cooler than indoors.
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Internal condensation – forms inside your home on the window surface, often due to high humidity.
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Condensation between panes – the biggest concern, as it means the window seal has failed and moisture has entered the unit.
How to Prevent Internal Condensation
If you’re seeing water droplets on the inside surface of your windows, here are steps you can take:
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Improve ventilation
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Use trickle vents if your windows have them.
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Open windows briefly to let moisture escape.
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Install extractor fans in kitchens and bathrooms.
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Control humidity
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Avoid drying clothes indoors when possible.
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Use dehumidifiers in rooms prone to dampness.
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Keep furniture slightly away from walls to allow airflow.
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Maintain a steady indoor temperature
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Sudden temperature drops can cause more condensation.
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Using consistent, lower heating levels can help.
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Dealing with Condensation Between the Panes
If condensation is forming inside your double glazing unit, this indicates a broken seal. Unfortunately, the air gap is no longer insulated, reducing efficiency and letting moisture inside.
Solutions include:
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Replacement of the sealed unit only – a cost-effective fix if the frames are still in good condition.
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Full window replacement – necessary if your frames are damaged, outdated, or energy inefficient.
💡 With BestPriceValue.com, you can quickly compare local installers and find the best value for replacement glazing without the hassle of sales pressure.
Can Double Glazing Repairs Fix Condensation?
Repair options are limited if the condensation is between the panes, but for internal condensation:
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Resealing edges
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Adding trickle vents
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Installing secondary glazing in problem areas
These can all help extend the life of your windows and improve comfort.
Professional Help vs DIY
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DIY fixes (like dehumidifiers or temporary sealant) may offer short-term relief.
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Professional repairs ensure long-term performance and energy savings.
Homeowners in areas like Essex, Hertfordshire, Surrey, and Sussex can benefit from trusted local installers who know the specific challenges of UK homes.
Conclusion
Condensation in double glazing is common, but knowing the difference between harmless moisture and a failed window unit can save you time, stress, and money.
👉 If you’re experiencing persistent condensation, use BestPriceValue.com to get matched with vetted installers in your area. You’ll receive quotes based on quality, availability, and price—without the hard sell.
📢 Want more expert tips on windows, doors, and home upgrades?
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