Triple Glazed Windows Melbourne

Triple glazed windows in Melbourne cost between $2,000 and $5,200 per window fully installed, depending on type and size. Fixed windows range from $2,000–$2,750 per window, awning and casement windows from $2,400–$3,300, tilt-and-turn windows from $2,900–$3,900, and sliding doors from $3,850–$5,200. Overall, triple glazing typically costs just 10–15% more than equivalent double glazed windows. Every Windows Republic quote includes supply, installation, AS 2047 certification, and a 10-year warranty.

Yes, triple glazed windows are worth it in Australia for south-facing rooms, noise-sensitive locations, and new builds targeting high NatHERS ratings. Triple glazing delivers a 30% improvement in energy efficiency over standard glazing and significantly improves year-round comfort. The premium over double glazing is just 10–15%, which is recovered through lower heating and cooling costs. We assess every project individually to confirm where triple glazing delivers the strongest return.

Double glazed windows use two panes of glass with one argon-filled cavity (24 mm IGU), achieving a U-value of 1.4 W/m²K. Triple glazed windows add a third pane and second argon cavity (36 mm IGU), achieving a U-value of 1.0 W/m²K. Both use Low-E coated glass and multi-chambered uPVC frames. The main advantage of triple over double is thermal — acoustic improvement is more modest (up to STC 34 vs up to STC 32).

Triple glazed windows reduce noise by more than 50% compared to single glazing, achieving an acoustic rating of STC 34. The exact level of noise reduction depends on the glass configuration, window size, and installation quality. For dedicated acoustic applications, we can also specify asymmetric glass thicknesses or laminated panes to optimise sound reduction further.

Yes. Every Windows Republic window is AS 2047 certified for structural performance, water resistance, and air infiltration. Triple glazing significantly helps achieve and exceed 7-star NatHERS ratings required under NCC 2025. Our windows are tested and certified by accredited Australian laboratories.

Triple glazed uPVC windows achieve a whole-window U-value of 1.0 W/m²K — meaning almost no heat passes through the glass. For comparison, single glazed aluminium sits at 5.8 and double glazed uPVC at 1.4. A U-value of 1.0 meets Passive House-level performance for Melbourne's climate zone. You can learn more about glazing and thermal performance at the YourHome.gov.au glazing guide.

Yes. Our uPVC frames are available in a range of profiles including timber-look finishes that suit Edwardian, Victorian, and Federation-style homes. The frames can be manufactured with traditional bar detailing and are available in multiple colours. Because each window is custom-made, we can match heritage proportions while housing a full 36 mm triple glazed IGU.

Most residential installations are completed within 1–3 days, depending on the number of windows and complexity of the openings. Manufacturing lead time is typically 4–6 weeks from order confirmation. We schedule installation at a time that suits you and aim to minimise disruption — most rooms are sealed and secure by end of each day.

Triple glazing offers a modest acoustic improvement over double glazing — up to STC 34 versus up to STC 32. The difference is noticeable but not dramatic. The primary advantage of triple over double glazing is thermal performance, not acoustic. If noise reduction is your main concern, specialised acoustic glass configurations (such as laminated or asymmetric panes) within a double glazed unit can sometimes achieve equal or better results at a lower cost. We are happy to advise on the best approach for your situation.

All Windows Republic windows are manufactured at our facility in Cheltenham, Melbourne. We fabricate the uPVC frames and assemble the insulated glass units on site, ensuring full quality control from raw profile to finished window. Our products are Australian Made and every unit is individually tested to AS 2047 before dispatch.

Yes. Triple glazed windows can be retrofitted into most existing openings. The 36 mm IGU is thicker than standard double glazing, so the frame depth increases slightly. Our Project Manager assesses each opening during the site visit to confirm suitability. In the majority of cases, no structural modifications are required — the new uPVC frames fit directly into the existing reveals.

Yes. Condensation forms when the inner glass surface drops below the dew point. Triple glazed windows keep the inner pane significantly warmer than single or double glazing — typically above 17°C even when it is near freezing outside. This virtually eliminates interior condensation, reducing mould risk and improving indoor air quality.

Triple glazed uPVC windows typically cost between $800 and $1,200 per square metre fully installed in Melbourne, depending on window type, opening style, and hardware. Fixed windows sit at the lower end, while tilt & turn and sliding doors are higher due to additional hardware and engineering. Every Windows Republic quote includes supply, installation, AS 2047 certification, and our 10-year warranty.

R-value is the inverse of U-value. Our triple glazed windows have a U-value of 1.0 W/m²K, which equates to an R-value of 1.0 m²K/W. For comparison, single glazed aluminium has an R-value of approximately 0.17 and double glazed uPVC sits at around 0.71. The higher the R-value, the better the insulation — triple glazing provides nearly six times the thermal resistance of single glazing.