Most Adelaide homes still have single glazed windows, and most of the time a single glazed window repair is the right call when one breaks. But every broken pane is also a chance to ask whether double glazing would make the room warmer in July, cooler in January and quieter all year.

This guide gives you the honest comparison, without the sales pitch, so you can decide what suits your home and your budget.

Energy Efficiency Comparison

Glass is the weakest point in a wall. According to the Australian Government’s Your Home guide, up to 40% of a home’s heating energy can be lost through windows and up to 87% of its heat gained through them in summer.

• Single glazing. One pane of glass, a few millimetres thick, between you and the weather. Heat moves through it easily in both directions, which is why single glazed rooms feel cold near the window in winter and hot in summer.
• Double glazing. Two panes sealed with an insulating gap, usually filled with air or argon. The gap slows heat transfer dramatically, so the room holds its temperature and your heater or air conditioner works less.
• Low-E and tinted options. Coatings and tints on either type reduce heat gain further. They add cost, and they suit west facing rooms that cook in the afternoon.
• Frames matter too. A double glazed unit in a thermally improved aluminium, timber or uPVC frame performs better than the same unit in a bare aluminium frame.

Noise Reduction Benefits

If you live near a main road, a school, a pub or a flight path, noise may matter more than energy.

• Single glazing. Thin glass transmits traffic and voices readily. Thicker glass helps a little, and laminated glass helps more, because the interlayer damps vibration.
• Double glazing. The sealed gap and two separate panes cut outside noise noticeably. Units built with different thicknesses of glass, or with one laminated pane, perform best against traffic and voices.
• The honest caveat. Double glazing reduces noise; it does not remove it. Gaps around frames, doors and vents let sound in, so a quiet room needs good seals as well as good glass.

Upfront Cost vs Long-Term Savings

This is where most decisions are made, so here is the straight version.

• Upfront. A single glazed window repair, one pane replaced in an existing frame, is the cheapest job in glazing and often done the same day. A double glazed unit costs noticeably more, and a new double glazed window, frame included, costs more again depending on size and frame.
• Ongoing. Double glazing lowers heating and cooling costs every year it is in place. How much depends on the room, its orientation and how you heat and cool, so treat any single payback figure with suspicion.
• Comfort and resale. Warmer winters, cooler summers, less condensation and a quieter house are the benefits people notice first. Buyers notice them too.
• Retrofit options. Some existing frames can take a slimline double glazed unit in place of the single pane, which is far cheaper than new windows. Our double glazed windows page covers what is possible.
• The sensible middle path. Many Adelaide homes double glaze the living areas and bedrooms they heat and cool most, and keep single glazing elsewhere.

Benefits for the Adelaide Climate

Adelaide asks more of a window than most cities. Summers regularly push past 35 degrees, winters are cool and damp, and the swing between a hot day and a cold night can be twenty degrees or more.

• Summer heat. Double glazing, especially with a Low-E coating, slows the afternoon heat that pours through west facing single panes.
• Winter cold and condensation. Single panes run cold and stream with condensation on winter mornings. Double glazing keeps the inner pane closer to room temperature, so the room holds its warmth and the glass stays drier.
• Daily temperature swings. The insulating gap evens out the swing, so a room does not overheat by three in the afternoon and freeze by midnight.
• Wind and dust. Neither type stops a hot northerly on its own. Good seals do, and both single and double glazed windows benefit from a service of their seals and hardware.
• Older homes. Many Adelaide homes have character timber frames. A single glazed window repair with the right glass, and a frame repair where needed, often makes more sense than replacing the whole window, and some frames can take a retrofit double glazed unit.

Repair Options for Both Types

Whatever you have, it can be repaired. The method depends on the glazing.

Single glazed window repair

The simplest job in glazing. A cracked or smashed pane is cut out, the rebate cleaned, and a new pane cut to size and fitted, in float glass where the Standards allow and Grade A safety glass where they require it, such as doors, low windows and wet areas. Most single glazed window repair jobs are done the same day. Failed putty, seals, rollers and locks are repaired at the same time, and if the frame is rotten we say so and quote frame replacement honestly.

Double glazed window repair

A fogged or cracked double glazed unit cannot be repaired as such, because the seal that keeps the gap dry has failed. The fix is a new sealed unit made to size and fitted into the existing frame, which is a repair to the window rather than a replacement of it. Frames, seals, rollers and locks on double glazed windows are repaired exactly as on single glazed ones.

The Short Answer on Single Glazed Window Repair vs Double Glazing

A single glazed window repair is cheap, fast and right for many rooms. Double glazing costs more up front and repays it in comfort, quiet and lower bills, most of all in the rooms you heat and cool the most and the ones that face west. If a pane has broken, fix it properly today and ask us what an upgrade would cost while we are there. If the whole house feels cold in winter and hot in summer, start with the living areas and bedrooms.

Single vs Double Glazing FAQs

Is single glazed window repair cheaper than upgrading to double glazing?

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Yes, by a wide margin. A single pane replaced in an existing frame is the cheapest job in glazing and done the same day, while double glazing costs considerably more per window.

Can I put double glazing into my existing window frames?

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Sometimes. Some timber and aluminium frames can take a slimline double glazed unit in place of the single pane. We check the frame on site and tell you whether a retrofit unit or a new window makes more sense.

Does double glazing really make a difference in Adelaide?

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Yes, most of all in rooms that face west, rooms you heat and cool the most, and bedrooms near traffic. It slows summer heat, holds winter warmth, cuts condensation and reduces noise.

Can a foggy double glazed window be fixed?

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The fogged unit is replaced with a new sealed unit in the existing frame. It is a repair to the window, not a whole new window.

What glass do I need for a single glazed repair?

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Float glass for standard windows, and Grade A safety glass, toughened or laminated, for doors, panels beside doors, low windows and wet areas under AS 1288. We supply both cut to size.

Should I double glaze the whole house at once?

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Not necessarily. Many Adelaide homes upgrade the living areas and bedrooms first and keep single glazing in rooms that are rarely heated or cooled.