Secondary glazing systems

A Smarter Alternative

For many homes, secondary glazing delivers comparable comfort and outstanding noise reduction at a fraction of the cost of full window replacement. If your existing windows are in good condition, it's often the smarter, more affordable solution.

Is it better than double glazing and what the difference ?

  • Secondary glazing offers many of the same benefits as double glazing—without the high cost and disruption of replacing your existing windows.

  • By installing a second sliding window on the inside of your current window, secondary glazing creates an insulating air gap that helps reduce outside noise, improve energy efficiency.

  • Preserves Existing Windows – Perfect for heritage homes or properties where you want to retain the original appearance.

Every Window is Different

Because every home is unique, all of our secondary glazing systems are custom made to suit your existing windows. This means pricing varies depending on your individual requirements.

The cost is based on factors such as:

  • Window size and dimensions

  • Sliding, hinged or fixed panel configuration

  • Frame colour and finish

  • Glass type and thickness

  • Locking mechanisms and hardware

  • Installation requirements

Unlike off-the-shelf products, every secondary glazing system is manufactured to ensure a perfect fit, maximum noise reduction, and a clean, professional finish.

Contact us today for a measure and quote, and we'll provide a tailored solution to suit your home, your needs, and your budget.

Bedroom with large sliding glass window showing rooftops, trees, and a partly cloudy sky outside.

Make Your Home More Energy Efficient

Secondary glazing adds an extra layer of protection to your existing windows, creating a sealed air gap that helps reduce heat transfer and improve your home’s insulation.

Reduce Heat Loss
Helps keep warmth inside during winter and reduces unwanted heat entering your home during summer.

Lower Energy Costs
Better insulation means less reliance on heating and air conditioning, helping reduce your energy usage and power bills.

Year-Round Comfort
Maintain a more stable indoor temperature and enjoy a more comfortable home throughout every season.

Bathroom with frosted window, black towel bar with white towel, potted plant, black soap dispenser, and mirror.
Modern living room with a large window showing green trees outside, a beige sofa with green and beige cushions, a wooden TV stand with a vase and decorative objects, and potted plants near the window.
A white room featuring a window with a view of neighboring house siding and shrubbery, and a closed white door with a silver handle.
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Close-up of a metal sliding door mechanism with a screw and roller, installed on a wood block and concrete base.

The Perfect Combination

For the best results, we recommend combining secondary glazing with a Kilargo door seal system.

Door seal systems

Close-up of a black sliding door hinge mechanism installed on a white door and frame with a magnified view showing the screw details, set on a wooden floor in a modern home interior.
White door with a metallic handle, surrounded by white walls and baseboards in a room with wood flooring.
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Benefits of Kilargo Door Seal Systems

  • 🔇 Reduces noise by sealing the gaps around your door.

  • 🌬️ Stops drafts, improving year-round comfort.

  • ❄️ Improves energy efficiency by reducing heat loss and air leakage.

  • 🐜 Helps keep out dust, insects and smoke.

  • 🚪 Maintains normal door operation with no impact on how the door opens or closes.

  • 🏠 Discreet appearance that blends seamlessly with your existing door.

No Major Renovations Required

Kilargo door seal systems are fitted directly to your existing door frame, meaning there's no need to replace your door or alter the surrounding framework. Installation is quick, clean and designed to preserve the look of your home while dramatically improving its acoustic performance.

Ready to Get Started?

Send us a quick note and let’s make your space stronger, safer, and more comfortable—together.