Double Glazing Sliding Windows

If you are looking to boost the efficiency of your sliding windows at home and improve in-home comfort, you can retrofit double glaze your existing windows without replacing the window frames!

Sliding windows can refer to multiple different types of windows, there are horizontal sliding windows, as well as vertical sliding windows. Vertical sliding windows are typically known as double hung windows, or sliding sash windows.

At RetroFit Double Glaze, we specialise in retrofitting existing sliding windows, both vertical and horizontal, replacing the glass with high performance, and energy efficient double glazed glass, or vacuum insulated glass.

Retrofit Double Glaze Your Existing Sliding Windows

Retrofit double glazing your existing sliding windows provides a range of benefits for your home and the environment including:

  • windows slides

    Enhanced insulation and in-home comfort

  • thermal performance

    Reduction in energy usage & costs

  • window security

    Added security

  • wnidow

    Noise reduction

  • windows door

    Reduction in condensation

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10 year warranty
10 Year Warranty

By retrofitting your sliding windows you can also save money as you avoid the need to replace your existing window frames!

Not only do we replace the glass with double glazing, we also accommodate for the additional weight of the glazing. This means different things for different types of sliding windows.

When we double glaze double hung sash windows, we also modify the weights to ensure that you have good operation of your windows.

For horizontal sliding timber windows, we can replace the tracks, rollers and get them sliding nicely with your new double glazing!

RetroFit Double Glaze
4.9
Based on 107 reviews
Philip Miles
Philip Miles
00:37 03 Sep 26
Retrofit did a fantastic job in replacing single glazed panes for double glazed units on my house which is about 17 years old. Very professional, tidy and all round great job!
Niall Kennedy
Niall Kennedy
02:06 30 Aug 26
Really great service from Retrofit. Did a great job double-glazing our 1890s sash windows. Very professional, responsive and always on time. Also super neat and cleaned up everything each day. Very impressed with the job. Particular shout outs to Henry, Valentin and Al who have been fantastic!
John Hughes
John Hughes
06:56 26 Aug 26
Good job all round. Staff were pleasant, got the job done in good time, kept it tidy and cleaned up afterwards. Liam and his team did a great job on the install.
Jeff Newman
Jeff Newman
06:54 25 Aug 26
Outstanding Service and WorkmanshipWe recently had the glass in our home windows replaced and upgraded to double glazing through Retrofit Double Glazing, and we couldn’t be happier with the experience.The professional nature of the company was evident from our very first contact with Warren, through to Jarrod, who carried out the measuring and provided the quote, and our installers, Liam and Eddy. The entire process went seamlessly from start to finish.A special shout-out to Liam and Eddy, who took great care in the way they worked in and around our home. Their extremely high level of workmanship, attention to detail and professional manner gave us complete confidence in the work being carried out. They were respectful of our home and left everything neat and tidy.We also appreciated the follow-up communication from the company, keeping us informed about when the work would be carried out. This gave us peace of mind and allowed us to plan ahead.We would highly recommend Retrofit Double Glazing to anyone considering upgrading their existing windows. From the initial contact through to completion, the service, communication and workmanship were exceptional.A fantastic experience from start to finish!
Jason Mathias
Jason Mathias
04:55 25 Aug 26
The RetroFit Double Glaze install team were fantastic! They were on time, very friendly and respectful and did a brilliant job. Highly recommended.
Inna Smith
Inna Smith
05:18 30 Jul 26
Henry, Shane and Shae did a magnificent job. Very professional and efficient. Thanks for your great work. A huge improvement on our old windows.
Anne
Anne
03:14 30 Jul 26
Brilliant job from start to finish. Easy quoting process and staff helpful. On the day the team arrived promptly, and introduced themselves. Valentin and Jasmin were very professional, polite, and eager to make the installation experience positive. They are a great team! Work completed in a timely manner, windows look wonderful, and they cleaned up before they left. Communication through the day as the job progressed was wonderful. Thanks so much.
Henry Whitmore
Henry Whitmore
00:49 23 Jul 26
Warren is the best bloke i’ve ever talked to, great guy. The glass is good too
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The RetroFit Double Glazing Process

Our professional and friendly install team service all of metropolitan Melbourne and our installation process is straightforward and hassle-free.

1

Measure & Quote

We visit your home and assess your existing sliding windows

2

Glass is Custom Made & Delivered

All of our high performance glass is cut to precise measurements

3

Old Glass Removed & Frame Routed

Your existing glass is carefully removed, we router out existing frames and install your new glass.

4

Double Glazed Glass Installed

New glass is sealed into place, and all old glass is removed and recycled

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Price Match Guaranteed

Find a better price on the same service and we'll match it!

DIY Double Glaze your sliding windows

If you are a DIY enthusiast and want to retrofit double glaze your sliding windows yourself we have a DIY double glazing solution.

Double Glazed Windows Installation

Meet our expert team of double glazed windows installers. 

diy double glazed retrofit window installation team

Why Use RetroFit Double Glaze?

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Over 12 Years Experience

We specialise in upgrading existing timber windows and enhancing energy efficiency without altering your home's character.

power effective

Enhanced Home Comfort

Enjoy reduced energy expenses, improved noise reduction, and increased security with our double glazed solutions.

sustainable

Commitment to Sustainability

By improving energy efficiency, our solutions help reduce your carbon footprint, contributing positively to the environment.

Frequently Asked Questions

Yes, most sliding windows can be retrofitted with double glazed glass.  Our expert team can assess your existing windows and recommend a tailored solution to best suit your home.

Absolutely, our install process ensures we maintain the functionality of your sliding windows and with double glazed glass you can enjoy greater energy efficiency!  

It sure is! Double glazed windows reduce heat transfer, helping you to reduce reliance on heating and cooling systems.

Once a booking is confirmed we have glass ready within four weeks and installs are completed within 3 days when your glass is available. 

If you are a DIY enthusiast we have a DIY double glazing solution that enables you to install new double glazed glass yourself. We offer a comprehensive guide to help you install your new glass and we provide support if you need it.

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