Retrofit & replacement

Retrofit double glazing in Perth

Turn an older opening into a quieter, more comfortable and more refined part of your home. We remove the existing window and frame, manufacture a new uPVC double-glazed system to suit the opening, then install and finish it as one complete upgrade.

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Why homeowners retrofit

A complete upgrade you can feel every day

Retrofitting with a new uPVC double-glazed system changes more than the glass. The frame, seals, hardware and glazing work together to create a quieter, more comfortable and more polished home.

01 · Comfort

Better thermal control

Double glazing and thermally efficient uPVC frames help reduce unwanted heat transfer and improve comfort through changing seasons.

02 · Quiet

A calmer interior

Well-sealed frames and the right glass specification can help reduce outside noise and create a more peaceful living environment.

03 · Finish

A clean architectural result

The old frame is removed and replaced with a purpose-built system, then sealed and trimmed so the new window belongs to the home.

04 · Security

Modern hardware and locking

Premium window hardware, secure locking and robust uPVC profiles bring modern functionality to an existing property.

05 · Maintenance

Made for easy living

uPVC requires very little routine maintenance and keeps its clean finish without the repainting associated with many older frames.

06 · Custom made

Built to your opening

Each system is measured and manufactured for the existing opening rather than forcing the home to fit a standard-size window.

Designed around your existing home

A complete window upgrade, not a compromise

At GaBe, retrofit means removing the existing window and frame and replacing the complete opening with a purpose-built uPVC double-glazed system. The new frame, insulated glass, seals and hardware are designed to work together as one high-performance unit.

The result is a cleaner finish, better sealing and a modern window system that feels integrated with the home rather than added on afterwards.

White uPVC retrofit windows installed in a brick home

Performance starts with the frame

Why we use uPVC for retrofit projects

uPVC is naturally low-conductive and its multi-chambered construction helps reduce heat transfer through the frame. That makes it especially well suited to a complete double-glazed replacement where thermal comfort is a priority.

Unlike a basic metal frame, the profile itself forms part of the insulating system. Combined with quality seals and professional installation, it helps create a more consistent indoor environment and a noticeably more refined window.

GaBe installer fitting a custom uPVC retrofit frame

More than two panes of glass

The glass is specified around the way you live

Every double-glazed window is built around an insulated glass unit: two panes separated by a sealed cavity. Depending on the project, the system can be configured with Low-E glass, argon fill or specialist acoustic glass to target heat, glare or outside noise.

The glass, cavity, frame and seals all contribute to the final result. That is why we design the complete window as a system rather than treating the glass as a standalone upgrade.

From measurement to final trim

A controlled installation from start to finish

We measure the existing openings, manufacture each new system to suit, remove the old windows, prepare the openings and install the new uPVC units. Final sealing and trims are completed as part of the installation so the result is clean, secure and visually consistent with the home.

Comfort through the seasons

Reduced heat transfer can make rooms easier to keep comfortable and can reduce the load on heating and cooling.

Efficiency that works quietly

A better-performing building envelope can help reduce unnecessary energy use while improving everyday comfort.

Low-maintenance materials

Routine care is simple: clean the glass and frames, keep drainage paths clear and have hardware adjusted if required over time.

GaBe retrofit service

Made locally. Installed by our team. Finished as one complete system.

We manufacture custom uPVC double-glazed windows for existing Perth homes and manage the installation from removal through to final finishing. Visit our Kewdale showroom to compare profiles, glass and colour options before you decide.

Get a free quote → Visit the showroom

Deciding between supply-only and supply plus install? The trade-offs are the same whether you're retrofitting or building new.

See supply vs supply + install →

What it's made of