Melbourne homeowners might think that installing double glazing means that you need to completely replace your windows. However, retrofit double glazing enables you to upgrade your existing timber windows and improve their energy efficiency even if you have an older home with heritage or period style windows.
What is RetroFit Double Glazing?
Retrofit double glazing is the process of upgrading your existing windows by replacing their original single-pane glass with high performance double glazed units. Retrofit glazing enables you to improve the thermal performance of your windows without replacing your window frames, instead the existing timber frame is modified to seamlessly fit new double glazed glass.
A double glazed unit has a unique design that consists of two panes of glass that are separated by a sealed insulating gap. This gap provides a thermal barrier that significantly reduces heat transfer between the outside and inside of your home.
Benefits of Double Glazing Existing Windows:
- Improvement in thermal efficiency achieved with the addition of the insulating gap that minimises heat loss and gain.
- More thermally efficient than new aluminium windows
- Reduced energy costs as a more stable home temperature enables you to cut back on heating and cooling systems.
- Reduction in outside noise by up to 70%
- Minimises condensation build-up on windows with more stable window temperature
- Better in-home comfort with less temperature fluctuations on hot and cold days
- Keeping your existing window frames means you can retain the current style and character of your home
- Reduces installation costs by up to 66%
Double Glazing Existing Timber Windows
A wide range of existing windows and in particular existing timber windows, can be successfully retrofitted with double glazing. Timber window frames are often sturdy and adaptable which makes them ideal for double glazing.
At RetroFit Double Glaze we have over 15 years experience upgrading existing timber windows to double glazed windows. Windows that we commonly upgrade include:
Sash Windows
Double Hung Windows
Awning Windows
Casement Windows
Sliding Windows
Heritage Windows
Custom Windows
Our double glazing process ensures that new glass is custom cut to fit existing frames and is sealed seamlessly. Movement and performance of your windows will be maintained and in some cases enhanced after double glazing.
Double Glazing Older Homes and Heritage Windows
Melbourne has many unique heritage and period homes featuring traditional timber windows, decorative detailing and unique architectural character. For homeowners wanting to maintain these features, full window replacement is often not desirable. This is where retrofit double glazing becomes a popular option.
Our team specialises in double glazing older homes with heritage and period windows. Retrofitting allows homeowners to upgrade window performance while preserving original timber frames and architectural style.
When Window Replacement May Be Needed
While in most cases windows can be retrofitted, there are certain circumstances where full window replacement may be required. This includes when:
- Original timber frames are heavily damaged or rotted
- Windows have lost structural stability
- Existing frames cannot safely support new double glazed units
A Cost Effective Approach To Upgrade Your Windows
For Melbourne homeowners who want to boost the energy efficiency of their home and avoid full window replacement, double glazing existing windows can be a cost effective option.
Upgrading existing windows can be up to 66% cheaper than full window replacement. For more information you can view our double glazing existing windows pricing list.
Learn More About Retrofit Double Glazing
Whether you live in a modern property or a heritage home with original timber windows, double glazing can be a cost effective solution that improves your home’s performance without changing its character or appearance.
To find out more about double glazing existing windows and what options there are for your home contact the RetroFit Double Glaze team for expert advice and a tailored assessment.



