A Complete Guide to Replacement Sealed Units: When, Why and How to Update Your Double Glazing

Summary

• Replacement sealed units offer a cost-effective alternative to full window replacement, typically saving 60-70% of the cost of new windows.
• Common signs that your sealed units need replacing include condensation between panes, draughts, increased heating bills, and visible damage to the glass.
• The replacement process is quick and minimally disruptive.
• Modern sealed units can significantly improve your home’s energy efficiency with options for double or triple glazing filled with argon or krypton gas.
• At Premier Windows, we provide high-quality replacement sealed units with superior thermal performance, achieving Window Energy Ratings of A++.

If you’ve noticed your windows looking misty or feeling the chill creeping in despite your double glazing, you might not need to replace your entire window system. Replacement sealed units offer a practical, cost-effective solution for homeowners across Buckinghamshire and beyond.

As specialists in window solutions for over 30 years, we at Premier Windows understand that maintaining your home’s comfort doesn’t always require a complete overhaul. Sometimes, targeted improvements make the most sense for both your comfort and your wallet.

This guide will walk you through everything you need to know about replacement sealed units – from spotting the warning signs to understanding the replacement process and the benefits you’ll enjoy once they’re installed.

There are several ways to tell that your window needs replacing.

Spotting the Signs: When Your Sealed Units Need Replacing

Condensation Between Glass Panes

The most obvious sign of a failed sealed unit is condensation or misting between the panes of glass. This occurs when the seal around the edge of the unit fails, allowing moisture to penetrate the space between the glass. Unlike normal condensation that can be wiped away, this moisture is trapped inside and impossible to remove without replacing the unit.

Increased Energy Bills

If you’ve noticed your heating bills climbing despite no change in usage, your sealed units might be failing. When the insulating gas (typically argon) escapes from between the panes, your windows lose much of their thermal efficiency, causing heat loss and making your heating system work harder.

Draughts Around Windows

While some draughts may come from the window frame or hinges, a failed sealed unit can also contribute to unwanted air flow. Modern sealed units create an effective thermal barrier – when they fail, you might feel the difference even if you can’t see visible damage.

Visible Damage

Cracks, chips, or scratches on your double glazing windows not only look unsightly but can compromise their performance. Even small imperfections can weaken the glass and reduce its insulating properties.

Condensation is an indicator that your glazing needs replacing.

Why Replacement Sealed Units Might Be The Solution For You

What Are Sealed Units?

Sealed units are the glass components of your double or triple glazing. They consist of two or three panes of glass separated by a spacer bar and sealed around the edges. The space between the panes is typically filled with an insulating gas like argon or krypton to improve thermal performance.

Significant Cost Savings

Perhaps the most compelling reason to opt for replacement sealed units is the cost. Replacing just the glass unit typically costs 60-70% less than installing completely new windows. If your frames are in good condition, there’s simply no need to replace them.

Improved Energy Efficiency

Modern sealed units offer excellent thermal performance. At Premier Windows, our replacement units achieve Window Energy Ratings of up to A++, helping to reduce heat loss and lower your energy bills during those chilly autumn and winter months.

Minimal Disruption

Replacing just the sealed units is far less disruptive than installing new windows. The process is quicker, cleaner, and causes minimal disruption to your home – particularly important if you’re replacing multiple units.

The Replacement Process

On installation day, our skilled fitters will carefully remove the old glass, clean the rebates, and install the new sealed units. The entire installation process usually takes just a few hours, with minimal disruption to your home.

Replacement Sealed Units From Premier Windows

At Premier Windows, we offer superior replacement sealed units for all types of windows and doors. Whether you need new glass for uPVC windows, aluminium frames, etc, we can provide the perfect solution.

Our replacement units come with a range of options, including different glass types, thicknesses, and gas fills. We can also provide speciality glass with furniture fade protection – ideal for conservatories and south-facing rooms.

All our replacement sealed units are backed by our comprehensive guarantee, giving you peace of mind that your investment is protected.

Who Are Premier Windows?

We’re a trusted local company with over 30 years of experience providing home improvement solutions throughout Buckinghamshire. Based in Aylesbury, we’ve built our reputation on exceptional customer service and quality products.

Our industry-leading range includes windows such as casements and tilt & turn styles, doors including popular patio and French doors, and glazed extensions.

We’re proud to have several accreditations to our name, including Which? Trusted Trader, and Secured by Design accredited.

Our dedicated team understands the importance of maintaining your home’s comfort and appearance. When you choose Premier Windows for your replacement sealed units, you’re choosing a company that values quality, efficiency, and customer satisfaction above all else.