How Long Do Double Glazing Units Last?

Double glazing units have become a staple in modern homes, offering improved insulation, noise reduction, and energy efficiency. But like any home improvement, they don’t last forever.

Understanding the lifespan of your double glazing and the factors that influence their longevity can help you make informed decisions about maintenance and eventual replacement. So, how long do double glazing units last, and what can you do to ensure they perform at their best for as long as possible?

What Affects The Lifespan Of Double Glazing Units?

The lifespan of double glazing units varies depending on several factors. On average, they last between 10 to 25 years, but this range can shift based on quality, installation, and environmental conditions.

Quality Of Materials And Construction

The durability of double glazing units largely depends on the materials used. High-quality glass, robust spacer bars, and reliable seals are essential for longevity.

At The Burgess Group, we use premium materials and advanced manufacturing techniques to ensure our double glazing units are built to last. Our units are designed with precision, incorporating features that protect against common causes of failure.

Environmental Stress

The location and orientation of your windows play a significant role in their lifespan:

• South facing units
  South facing windows and doors are exposed to more direct sunlight and temperature fluctuations, which can cause the adhesive holding the spacer bars to degrade faster. These often last less than 12 years.
• Temperature gradient 
  When the difference between indoor and outdoor temperatures is extreme, it creates stress on the seals. Homes in colder climates may experience more pressure on the seals due to these temperature differences.
• Smaller air gaps
  Smaller gaps between panes can increase stress as temperature changes cause more pronounced expansion and contraction.

While you can’t change your home’s location, choosing a reputable supplier like The Burgess Group ensures your units are designed to withstand these challenges.

The Critical Perimeter Seal

The perimeter seal is the most critical component of a double glazing unit. It protects the air gap between the panes and prevents moisture from entering. This seal typically consists of:

• Butyl mastic that retains a desiccant material
• A perforated metallic spacer bar
• Desiccant that absorbs any moisture in the air gap

The most common cause of failure is excess moisture around the seal. Over time, this moisture causes the butyl to fail, allowing water to enter the air gap. When this happens, the desiccant becomes overwhelmed, and unabsorbed moisture condenses on the colder surface, creating that telltale foggy appearance.

Signs Your Double Glazing Units Need Replacing

Even with the best care, double glazing units will eventually show signs of wear. Here are some common indicators that it’s time to consider a replacement:

Condensation Between Panes

If you notice fogging or condensation inside the glass that can’t be wiped away, it’s a clear sign that the seal has failed and moisture has entered the air gap. This not only affects visibility but also reduces the unit’s insulating properties.

Draughts Or Cold Spots

Over time, the seals around the window frame can degrade, allowing cold air to seep into your home. If you feel a draught near your windows, it’s likely time for an upgrade.

Difficulty Opening Or Closing

Warped frames or misaligned mechanisms can make it hard to operate your windows. This is often a sign that the unit is nearing the end of its lifespan.

Increased Energy Bills

If your heating costs are rising despite no change in usage, your double glazing units may no longer be providing adequate insulation.

How To Extend The Life Of Your Double Glazing Units

While double glazing units will eventually need replacing, there are steps you can take to maximise their lifespan:

Choose High-Quality Units

Investing in premium double glazing units from a trusted supplier like The Burgess Group ensures you get durable, energy-efficient products designed to last. Choosing quality from the start is the most important factor in ensuring longevity.

Regular Maintenance

Simple tasks like cleaning the frames with soapy water and a soft cloth, lubricating hinges, and checking seals can prevent minor issues from becoming major problems. Our aftercare team is always available to provide guidance on maintaining your windows and doors.

Protect Against Water Damage

Ensuring proper drainage around your windows can prevent water from pooling and damaging the seals. Proper installation by experienced professionals helps safeguard against water ingress, which is one of the main causes of seal failure.

Why Choose The Burgess Group For Your Double Glazing Needs?

At The Burgess Group, we pride ourselves on delivering exceptional quality and service. Here’s what sets us apart:

Premium Materials And Craftsmanship

As masters of our craft, we’re committed to using quality materials and providing impeccable workmanship. Our objective is to provide gorgeous bespoke windows and doors while treating your home with the level of care and attention to detail it deserves.

Expert Installation

Our skilled installation teams ensure your units are fitted correctly, maximising their performance and lifespan.

Comprehensive Guarantees

As members of the Independent Warranty Association, we provide insurance-backed guarantees for your complete peace of mind. This means your investment is protected even in the unlikely event of us ceasing trading.

Personalised Service

From initial consultation to aftercare, we provide tailored solutions to meet your needs and exceed your expectations.

Visit Our Beautiful Showrooms

You’re most welcome at our beautiful Suffolk showrooms in Woodbridge and Bury St Edmunds. Our friendly design experts can answer your questions and make recommendations based on your home’s needs.

As a FENSA registered company and members of the Independent Warranty Association, we provide insurance-backed guarantees for your complete peace of mind.

Contact The Burgess Group today for expert advice and installation services that will ensure your double glazing serves your property well for many years to come.

Frequently Asked Questions