Single-glazed windows are often the weakest point in a building’s thermal envelope. Heat escapes through them in winter, pours in through them in summer and condensation forms on the inside on cold mornings. Double glazing tackles all three by placing a sealed, insulating gap between two panes of glass.
Our window double glazing service starts with your existing frames. Many aluminium and some timber windows can take a double-glazed unit with modified beads or sashes, which avoids the cost and disruption of full window replacement. Where frames are too shallow or worn out, we explain the alternatives honestly.
In short: Hustle Installations installs window double glazing for homes and commercial premises, retrofitting insulated glass units where frames allow. Price depends on window size, frame type, glass options and access. We aim to respond to enquiries within one business day and offer a free assessment and quote.
A single pane of glass does very little to slow heat transfer. Add a second pane with a sealed cavity between them and the window becomes far better at holding warmth inside in winter and keeping it out in summer. Rooms feel more even in temperature, heaters and air conditioners work less, and the cold, wet glass that leads to condensation and mould around frames becomes much less common. Street noise is softened too, especially when a laminated pane is included in the unit.
The key is matching the unit to the window. We check frame depth and condition, the direction each window faces and what you most want to improve, whether that is warmth, summer heat, noise or condensation. Then we specify the glass combination, such as low-E coatings or a laminated inner pane, to suit. To see how double glazing fits into our broader window glass work, visit our window glazing page.
Double glazing works well when it is specified and installed properly. These are the mistakes that undermine it.
Forcing units into unsuitable frames. A double-glazed unit is thicker and heavier than single glass. Squeezing it into a shallow frame or a sash that cannot carry the weight leads to poor seals and sticking windows.
Ignoring leaky frames. Upgrading the glass while draughts still whistle around worn seals and gaps wastes much of the benefit. Frames need checking and sealing too.
Choosing glass without considering orientation. A west-facing window and a shaded south-facing one need different glass. Low-E coatings and tints should be selected with sun exposure in mind.
Expecting standard units to stop heavy noise. Double glazing helps, but for busy roads an acoustic laminated pane in the unit usually performs better than two plain panes.
We tailor each double glazing job to the frames and the result you are after.
Every double glazing project is priced on the windows involved. The main factors are:
Indicative per-window prices are listed on our window double glazing Melbourne page. Prefer a tailored figure? We will assess your frames and quote free.
Retrofitting double glazing is precise work. Each unit is made to exact measurements, so we measure every window individually rather than assuming a set of windows are identical. On installation day we remove the old glass, prepare the frame, fit the new unit on setting blocks and seal it with suitable beads and glazing wedges. Sashes are checked to make sure they still open, close and lock smoothly.
Every double glazing job follows four steps:
Request a free, no-obligation quote — we design with you in mind.
Fully licensed and insured window and door specialists you can trust.
The highest quality products and materials at very reasonable prices.
We deliver the results you want on budget and on time, every single time.
A double-glazed unit, often called an insulated glass unit or IGU, is two panes of glass separated by a spacer around the edge and sealed to create a cavity. The cavity is filled with dry air or, in some units, an inert gas such as argon, which slows heat transfer further. A desiccant in the spacer absorbs any moisture so the inside surfaces stay clear. If the edge seal fails over time, moisture gets in and the unit fogs, which is when it needs replacing.
Performance depends on the combination. Low-E coatings reduce radiant heat transfer, laminated panes add security and noise reduction, and toughened glass is used where safety glass is required under AS 1288. Whole windows are rated for performance under AS 2047, so when we retrofit units we keep the frame’s function and sealing in mind, not just the glass.
People often come to us after being told the only solution is replacing every window in the house, at a price that made them shelve the idea altogether. Others tried cheap add-on panels that fogged up or rattled, or had double-glazed units forced into frames that could not hold them, leaving windows that stick and leak.
We start with what you have. If your frames can take a retrofit, we will say so and quote it. If they cannot, we explain why and outline sensible alternatives. We recommend glass based on orientation, noise and how each room is used, not on what is most profitable. And we install every unit carefully so the seals last and the windows keep working the way they should.
What sets us apart:
We check whether your existing frames can take double glazing before suggesting replacement.
Low-E, tinted and acoustic options chosen for each window's exposure.
Every insulated glass unit is built to our individual window measurements.
If a frame is unsuitable, we tell you plainly and explain the options.
Sashes and sliders are checked so windows still open, close and lock properly.
Old glass removed, frames cleaned and new units polished before we leave.
Tell us what you need, where the project is located, and what outcome you want. We ask the right questions, review the scope, and provide a clear quote with no obligation.
We inspect access, openings, levels, existing frames, surrounding finishes, and any site-specific requirements. Accurate measurement helps prevent delays, gaps, and unnecessary rework.
We confirm the installation approach, materials, scheduling, and finish expectations. For Melbourne projects, we can also discuss thermal performance, double glazing, weather sealing, and BAL rating considerations where required or relevant.
Our team installs with care, precision, and safety. We focus on alignment, fixing, glazing, sealing, operation, and clean presentation.
Before we leave, we check the installation, clean the work area, and walk through the finished result. You get a tidy site and a result built to perform.
Window double glazing replaces a single pane with an insulated glass unit made of two panes separated by a sealed cavity. The cavity slows heat transfer, keeping rooms warmer in winter and cooler in summer, and reduces condensation and noise. Our window double glazing service can retrofit units into suitable existing frames or recommend new windows.
Often, yes. Many aluminium frames and some timber sashes can be adapted to hold a double-glazed unit with new beads or modified rebates. The frame must be deep enough and strong enough to support the extra thickness and weight. We assess each window and confirm whether a retrofit is practical.
For most single-glazed homes and offices, double glazing noticeably improves comfort, reduces condensation and can lower heating and cooling use. The benefit is greatest in rooms with large windows or strong sun exposure. We help you prioritise the windows that will make the biggest difference if you prefer to stage the work.
It does reduce noise, particularly higher-pitched sounds. For heavy traffic or tram noise, a unit with an acoustic laminated pane usually performs better than two standard panes. Sealing gaps around the frame also matters. We recommend the right combination after understanding the noise source and the room's use.
Low-E glass has a thin coating that reduces radiant heat transfer. In a double-glazed unit it improves winter heat retention and can cut summer heat gain, depending on the coating type. It is worth considering for living areas and sun-exposed windows. We explain the options when quoting your window double glazing.
Fogging between the panes means the edge seal has failed and moisture has entered the cavity. The unit cannot be dried out effectively and usually needs replacing. In most cases the frame can stay, and we simply fit a new made-to-measure unit.
Units are made to order after we measure, which typically takes a few weeks depending on glass type and supplier lead times. Installation itself is quick, with several windows usually completed in a day. We confirm timing in your quote and keep you updated.
Sometimes. Older timber sashes can be thin, and adding a heavier unit may affect how they slide or balance. Some sashes can be modified or rebuilt to suit. We assess the timber and weights carefully and give honest advice on whether a retrofit will work well.
Yes. We protect floors and furnishings, remove old glass, beads and packaging, and clean the new units and frames. Every window is opened and closed to check operation before we leave. You are left with clean, working windows and no mess.
Call 0499 090 079 or send photos of your windows and frames through our contact form. We will arrange a free assessment and provide a written quote for each window. We aim to respond to enquiries within one business day.
Ready to upgrade, replace, or install? Contact Hustle Installations for a clear quote, practical advice, and workmanship you can rely on.
Tell us about your project, the service you need, and where the property is located. We will get back to you with the next step as soon as possible.
Prefer to talk? Call us on 0499 090 079.
For windows, doors, glass, glazing, caulking, skylights, pergolas, sun shades, and automatic doors, talk to Hustle Installations today. With us, you can be assured of precise work with clean finishes and reliable communication. We provide clear quotes, practical advice, and workmanship built to last for Melbourne homes, businesses, and construction projects.
