Double Glazed Windows and Doors Built for Australian Conditions

Stay warmer in winter and cooler in summer — and reduce your energy bills in the process

At Thermotek, our double glazed windows and doors are designed for high performance in the harsh Australian conditions. Maybe you’re looking for a way to reduce your energy bills in the long run, or you might be seeking better insulation and noise reduction in your next build. For every project, we make it simple to choose the right double glazed options for your home.

Why Choose Double Glazed Windows?

Unlike single glazed windows, double glazing uses two panes of glass with a layer of insulating argon gas in between. This helps reduce heat loss in winter and heat gain in summer, so you rely less on air conditioning and enjoy a more consistent indoor temperature — all while saving money.Thermotek’s double-glazed window range is ideal for anyone seeking a more energy-efficient, cost-effective home. Whether you’re building, renovating or retrofitting old single glazed windows, here’s some benefits of double glazing you can expect.

1. Lower Power Bills and Long-Term Savings

Up to 45% of your home’s heating and cooling energy can be lost through your windows and doors. Double glazing helps trap warmth inside during winter and blocks heat from entering in summer, meaning less reliance on heating and air conditioning. That means lower energy use, lower costs, and a smaller footprint.

2. Year-Round Thermal Comfort

With double glazed glass, your home stays cooler in summer and warmer in winter. No more hot spots near windows or cold draughts at night, but consistent and comfortable temperatures with less effort.

3. Noise Reduction

Tired of traffic, barking dogs or noisy neighbours? One huge benefit of double glazed windows is their ability to cut down outside noise. The two panes of glass and the argon gas between them act as a sound barrier, helping create a more peaceful home.

4. Reduce Condensation

Condensation is a common issue with single glazed units in colder climates. Double glazing reduces the chance of condensation forming on the inside of windows, as the outdoor and indoor air have a lesser temperature difference. Less condensation means fewer mold risks and better indoor air quality.

What Makes Thermotek Different?

We design, manufacture and install high performance, energy-efficient window and door systems that are made for the Australian lifestyle.

• Australian-made: All our double glazed windows are made right here in our low-waste Melbourne warehouse, so we understand how to build for the harsh Australian conditions.
  
• uPVC that lasts: Our frames are made from recyclable uPVC, which won’t warp, rot or peel, even in harsh sun or coastal conditions. The best part? uPVC will strengthen over time, making it a superior long-term option.
  
• Experts in energy efficiency: We’ve helped thousands of Australian builders and homeowners improve the energy efficiency of their builds and reduce power bills with smarter window choices.
  

Customisable options: From awning and casement to tilt and turn and sliding styles, we can help you choose the right type of windows to suit your home and lifestyle.

Frequently Asked Questions

What is double glazing and how does it work?

Double glazing uses two panes of glass with a sealed gap filled with argon gas. This gap acts as insulation, slowing down heat transfer and reducing noise, and making your home more energy efficient and comfortable as a result.

How much can I save with double glazed windows?

Savings vary depending on many factors like your location, house design and size, but many homeowners can see up to 50% reductions in heating and cooling costs after installing double glazed windows. That’s because your home holds temperature more effectively, reducing the need for heating and air conditioning. One of our clients managed to cut their yearly energy bills by 73% since retrofitting with double glazed windows.

Can I replace existing windows with double glazed ones?

Absolutely. We can replace your existing single glazed windows with high-performance double glazed glass tailored to your home and lifestyle. Contact us to discuss your retrofitting requirements.

Does double glazing reduce noise?

Yes, double glazing reduces noise. The extra pane of glass and insulating gas layer act as a sound barrier, significantly cutting down noise from traffic, neighbours or construction. Double glazed windows and doors can cut down noise pollution by up to 70%.

Why is double glazing not standard in Australia?

Unlike Europe, where strict building codes and colder climates made double glazing the norm decades ago, Australia’s regulations have historically been more relaxed. But with rising energy costs and increased focus on sustainability, more Australians are now choosing double glazed options for comfort and savings. They are also becoming more common as the energy efficiency requirements have changed, and all new homes must now achieve a minimum of a 7-star energy rating: double glazed windows play a big part in achieving this.

Is low-E glass better than double glazing in Australia?

Low-E glass and double glazing both improve energy efficiency, but they serve different purposes. Low-E glass reflects heat and UV rays, while double glazing insulates by using two panes of glass and argon gas. For the best results in Australian climates, we recommend combining both technologies. We offer this option at Thermotek.

Do double glazed windows stop condensation?

They certainly help. Condensation often forms on cold surfaces, like single glazed windows in winter. Double glazing reduces temperature differences between inside and out, meaning less condensation and better air quality inside your home.