Double glazing has become a standard feature in homes across Milton Keynes and the wider Buckinghamshire area. It keeps homes warmer, reduces energy bills, and improves security. But what happens when you notice water, condensation, or misting between the panes?
This issue is more common than you might think, especially in older or poorly installed units. In this blog, our team at Gallagher’s Windows, Doors & Conservatories Ltd explains the main causes of water between double glazing, how to spot the early signs, and when it’s time to take action. With over 25 years of experience, our specialists are here to help you restore comfort and efficiency to your home.
Why Water Appears Between Double-Glazed Windows
If your double glazing has fogged up or has water droplets trapped inside, it’s usually a sign that the sealed unit has failed. Here are the most common causes:
Broken or Failing Seals
Every double glazed window relies on an airtight seal around the glass. Over time, these seals can deteriorate or crack, allowing moisture to seep in. Once the seal has failed, condensation is inevitable.
Poor Installation Quality
If your windows were installed incorrectly, gaps or weaknesses in the seal may appear sooner than expected. The weather can swing from damp winters to hot summers, and poorly fitted windows are especially vulnerable.
Ageing or Low-Quality Units
Not all double glazing is created equal. Older units — or those made from low-grade materials — are far more prone to condensation between the panes. Many homes built 15–20 years ago are now seeing these signs.
Extreme Weather Conditions
Sudden temperature changes and prolonged damp weather (common in Buckinghamshire) can speed up seal failure. South-facing windows are also at higher risk due to constant expansion and contraction.
How to Spot the Early Signs of Failed Double Glazing
You don’t need to be an expert to notice when your windows are underperforming. Look out for:
- Misting or fogging inside the glass unit
- Visible water droplets between panes
- Cold draughts near the frame
- Higher energy bills from heat loss
- Black mould is appearing near the seals
If you spot these issues, it’s time to act quickly before the problem worsens.
When to Act on Condensation in Double Glazing
Homeowners often ask us: “Can I leave it for a while?” The answer is no — here’s why:
- Energy bills will increase as heat escapes
- Damp and mould may spread into your walls
- Security may be compromised if frames weaken
- Your property value could drop due to poor energy ratings
The sooner you address water in your double glazing, the more cost-effective the solution will be.
Can Double Glazing Be Repaired or Does It Need Replacing?
The right solution depends on the condition of your windows:
- Repairs: In some cases, resealing or replacing the glass unit only is possible. This can be cheaper if frames are still in good condition.
- Replacement: If your units are old, damaged, or inefficient, replacing with modern energy-rated uPVC or aluminium windows is usually the best option.
At Gallagher’s, we provide free consultations to help homeowners decide the most suitable approach.
Benefits of Replacing or Repairing Double Glazing
Acting on misted or failed double glazing brings immediate and long-term benefits:
- Lower energy bills thanks to improved insulation
- Enhanced comfort with a warmer, draught-free home
- Noise reduction for quieter living
- Eco-friendly living with a reduced carbon footprint
- Increased property value through improved EPC ratings
Areas We Cover for Double Glazing Repairs
Based in Bletchley, Milton Keynes, Gallagher’s proudly serves homeowners across the region, including:
- Wolverton
- Stony Stratford
- Newport Pagnell
- Bedford
- Northampton
If you’re in Buckinghamshire, Bedfordshire, or Northamptonshire, we’re your trusted local double glazing experts.
Why Trust Gallagher’s Windows, Doors & Conservatories?
For over 25 years, Gallagher’s has been helping local homeowners improve their homes with high-quality double glazing. Here’s why customers trust us:
- 25+ years of experience
- Fully insured and accredited installers
- Products featuring Pilkington K Glass and reinforced 70mm frames
- Local showroom in Bletchley to see products in person
- Excellent reviews from homeowners
Common Questions About Water Between Double Glazing
Can misted double glazing be repaired?
Yes — if the frames are in good condition, we can often replace just the sealed glass unit.
How long does replacement take?
Most single window replacements are completed in a few hours. Full-house installations usually take 1–3 days.
How much does it cost to fix double glazing?
Prices vary depending on the type of window and the extent of damage. uPVC repairs are typically more cost-effective, while aluminium and timber units may cost more. We always provide a clear, free quote.
Does insurance cover failed double glazing?
Some home insurance policies cover damaged or failed windows, but not general wear and tear. Check your policy for details.
Ready to Fix Your Double Glazing in Milton Keynes?
If you’ve noticed water or misting between your double glazing, now is the time to act. At Gallagher’s Windows, Doors & Conservatories Ltd, we’re proud to be a trusted local name with over two decades of experience.
