If you’ve noticed condensation between double glazing in your home, you’re not alone. Misted or foggy windows are a common problem for homeowners across Milton Keynes, especially during the colder months. Not only do they block natural light and affect visibility, but they can also reduce insulation and energy efficiency.
At Gallagher’s Windows, Doors & Conservatories Ltd, we help local homeowners identify the causes of condensation and provide long-lasting solutions that restore comfort and clarity. In this guide, we’ll explain what causes internal condensation, how to fix it, and when a professional repair or replacement is the right choice.
What Causes Condensation Between Double Glazing?
Double-glazed windows are designed to trap a layer of gas or air between two panes of glass, providing insulation and keeping heat inside your home. Over time, the seals that hold this gas in place can fail, allowing moisture to enter and fog up the inside of the glass.
Common causes include:
- Age-related wear on seals
- Poor-quality or rushed installation
- Exposure to extreme temperature changes
- Frame warping or weathering
- Cleaning chemicals that damage seals
Once the airtight barrier breaks, condensation appears inside the unit and cannot be wiped away. According to the Glass and Glazing Federation (GGF), failed seals are the number one cause of misted double glazing in UK homes.
If you’re unsure whether your windows need repair or replacement, visit our windows page for more information about our double-glazing options.
Can You Fix Condensation Inside Double Glazing Yourself?
DIY kits for misted window repair often promise quick fixes but rarely deliver lasting results. These kits may involve drilling holes into the glass to release trapped moisture or using silica gel to absorb dampness.
While these methods might clear the condensation temporarily, they cannot reseal the glass unit or restore the insulating gas between the panes. Once the seal is compromised, the window’s energy efficiency drops significantly.
For a long-term solution, it’s best to contact a professional team like Gallagher’s. We specialise in double glazing replacement, using high-quality Pilkington K glass for superior insulation and clarity.
When Should You Replace Your Double Glazing?
If your windows frequently mist up or look foggy even after cleaning, the double-glazing unit has likely failed. Other signs it’s time for replacement include:
- Persistent condensation inside the glass
- Cold spots or draughts near windows
- Visible mould, damp, or rot around the frames
- A noticeable drop in warmth or soundproofing
Gallagher’s has over 25 years of experience fitting energy-efficient double-glazed windows, helping homeowners save on heating costs while improving comfort.
What Are Your Options for Misted Window Repair?
If your frames are in good condition, we can often replace just the failed glass unit rather than the entire window. This cost-effective approach restores visibility and insulation without disrupting the frame.
You may choose:
- Glass unit replacement – Ideal if your frames are still secure.
- Full window replacement – Best when both glass and frames are damaged or outdated.
Our team supplies and installs premium uPVC and aluminium double-glazed windows in Milton Keynes, all built for energy performance, security, and long-term reliability.
How to Prevent Future Condensation Between Double Glazing
Preventing condensation starts with consistent maintenance and good ventilation. To reduce the risk of misted glass in the future:
- Keep trickle vents open to allow air circulation.
- Use extractor fans in kitchens and bathrooms.
- Avoid drying clothes indoors without ventilation.
- Clean frames and seals regularly to prevent dirt buildup.
- Upgrade older windows to new, energy-efficient double glazing solutions.
The Energy Saving Trust reports that replacing single glazing with modern A-rated double glazing can save homeowners up to £235 per year in heating bills.
To explore modern designs and styles, visit our doors and conservatories page.
Why Choose Gallagher’s for Double Glazing Repairs?
- Over 25 years of trusted local experience
- Fully insured, accredited installers
- Family-run business known for friendly, professional service
- Energy-efficient materials, including Pilkington K glass
- Excellent reviews on Google and Checkatrade
At Gallagher’s, we’re committed to providing transparent advice and exceptional workmanship. Whether you need misted window repair or complete double glazing replacement, our team will recommend the best solution for your home and budget.
Book Your Free Double Glazing Survey in Milton Keynes
If you’re dealing with condensation between double glazing in your home, don’t wait for the problem to worsen. Contact Gallagher’s Windows, Doors & Conservatories Ltd today for professional advice and a free, no-obligation survey.
Call 01908 639 666 or complete our online form to book your appointment. You can also visit our showroom in Bletchley, Milton Keynes, to explore our full range of energy-efficient windows, doors, and conservatories.
