Double Glazed Windows and Doors in Sydney
Made to measure in European uPVC, installed by our own team across Sydney, the Central Coast, Newcastle and Wollongong. From $350 per window, with a 10-year warranty.
Double glazing is two panes of glass with a sealed, gas-filled cavity between them. That cavity is the whole point: it is a far worse conductor of heat than glass is, and it interrupts the path sound takes through a window. Everything else - the coatings, the frame, the hardware - exists to make the most of it or to stop it being undone.
What double glazing actually fixes
Three problems, in the order Sydney homeowners usually rank them.
Summer heat. A west-facing single glazed window is, in practical terms, a radiator. A double glazed unit with a Low-E coating reflects a large share of solar infrared before it ever enters the room, which is why the difference is most obvious in late afternoon in a room you previously could not use in February.
Noise. The cavity breaks the transmission path, and acoustic laminated glass adds a damping interlayer that absorbs vibration rather than passing it on. Together, in a properly sealing frame, that reaches up to 45dB of reduction. If a main road, a flight path or a rail line is your reason for calling, this is the part of the specification that matters and it is worth spending on.
Winter warmth and condensation. The inner pane sits much closer to room temperature than a single pane does, so it stops shedding heat into the room's air and, just as importantly, stops being the cold surface that water condenses onto every morning. Condensation on the inside of a window is not a window fault - it is the window telling you it is the coldest surface in the room.
Why the frame decides the result
This is the part that gets skipped in most sales conversations. A high-specification insulated glass unit set into a conductive, poorly sealing frame will disappoint you, because heat and noise will simply route around the glass. Standard aluminium conducts heat straight through the metal from outside to inside - a thermal bridge across the wall line that no glazing upgrade can compensate for.
Our frames are five and six chambered European uPVC, welded at the corners, with steel reinforcement where structure demands it and frame U-values as low as 0.77 W/m²K. They are rated for insulated glass units up to 44mm thick, which matters more than it sounds: the acoustic laminated units that do the real work on noise are heavy, and a slimmer frame simply cannot take them. Multi-point European hardware then pulls the sash hard against a continuous gasket, so the seal is genuine rather than nominal. The full uPVC versus aluminium comparison covers this in detail.
Double or triple glazed?
For the overwhelming majority of Sydney homes, double glazing with the right coatings and an acoustic laminated pane where noise is a factor is the correct answer, and the money that would go into a third pane buys more comfort spent on glass specification instead. Triple glazing earns its place in Passive House projects, in the coldest parts of the Blue Mountains and Southern Highlands, and wherever a certification target rather than everyday comfort sets the requirement. We build both - see triple glazed windows for where the line sits.
Double glazed windows, by opening style
Every style below is built as a double or triple glazed unit in European uPVC.
Casement Windows
Side-hinged so the sash swings clear of the opening, a casement gives you the whole aperture for airflow and an uninterrupted view when open.
From $580
Tilt and Turn Windows
The signature European window: one handle, two modes. Tilt the sash inward at the top for secure background ventilation, or turn it a further ninety degrees to swing fully open.
From $780
Awning Windows
Top-hinged so the open sash forms a small awning over the opening - which is exactly why they can stay open through a Sydney downpour.
From $520
Sliding Windows
Horizontal operation within the frame, so nothing swings into the room or out over a walkway. The practical choice where space rules out a casement.
Fixed Windows
No sash, no hardware, no gap to seal - which makes a fixed window the best thermal and acoustic performer in the whole range, and the cheapest per square metre.
From $350
Bay Windows
An angled multi-panel configuration that projects beyond the wall line, adding usable floor space and a wide outlook to the room behind it.
Double glazed doors, by opening style
Sliding Doors
The practical opening for balconies and courtyards - nothing swings, so the space either side of the door stays usable.
From $1,850
Bi-Fold Doors
Panels fold back on themselves and stack clear of the opening, so the wall between inside and outside effectively disappears.
From $3,200
French Doors
A pair of hinged glazed leaves meeting in the centre - the classic European opening, and the one that suits a period Sydney home best.
From $2,600
Lift and Slide Doors
Turning the handle lifts the entire sash off its seals onto the rollers - so a panel weighing hundreds of kilos moves with one hand.
Tilt and Slide Doors
A sliding door that also tilts - secure background ventilation without leaving a full-height opening standing open.
Stacking Doors
Multiple sliding panels that gather behind one another at one end of the opening, clearing most of the aperture without folding.
Entrance Doors
The front door is usually the weakest thermal element left in a house after the windows are done - and the easiest one to forget.
Double glazing across Sydney
We measure, manufacture and install across the Sydney metropolitan area - the Eastern Suburbs, Inner West, North Shore, Northern Beaches, Sutherland Shire and Western Sydney - as well as the Central Coast, Newcastle and Wollongong. Installation is by our own team rather than subcontractors, which is what lets us stand behind a 6-year workmanship guarantee alongside the 10-year product warranty.
The right specification is not the same in every part of the city. Coastal and harbour-front homes need corrosion resistance and salt-air durability that aluminium struggles with. Homes under a flight path or on an arterial road need the acoustic specification prioritised over the thermal one. Western Sydney needs solar control above everything else, because the problem there is summer heat rather than winter cold. We set the glazing to the address, not to a catalogue. See areas we serve for the full coverage list.
Apartments, units and strata buildings
Replacing windows in a strata scheme is a different exercise to replacing them in a house: the windows are usually common property, the decision belongs to the owners corporation rather than to any one owner, and the work has to be scheduled around residents. We run a dedicated program for this, with itemised proposals formatted for AGM papers, staged delivery across financial years where budgets require it, and committee presentations where they help. See strata window replacement.
Double glazing, answered
Further reading: what double glazing costs, how double glazing reduces noise, double versus triple glazed in Sydney, and Passive House certified glazing.