The Benefits of Double Glazed Windows and Doors

Double-glazed windows and doors may have long been popular in cooler climates, but they’re a valuable asset in warmer climates too.

In fact, there are several lesser-known benefits of double-glazed products over single-glazed windows and doors.

So in this blog post, we’re exploring the many benefits of double-glazed windows and doors.

What is Double-Glazing?

Double-glazed windows and doors have panels that consist of two pieces of glass bonded together with a spacer between them. This space is hermetically sealed and filled with argon gas.

Structurally, these gas-filled, separated panes are the key difference between double-glazed products and their single-glazed counterparts. However, this key difference results in a world of difference when it comes to outcomes and benefits.

Heat Loss & Gain

The space between the glass in double-glazed products acts as a thermal barrier between your home and the outside environment. This makes double-glazed products more effective insulators than single-glazed windows and doors, as they keep your home’s temperature more steady, and insulate you from the full effects of temperature extremes.

By reducing your heat loss and gain, double-glazed windows and doors keep your home cooler in summer and warmer in winter – which is exactly what everyone wants.

Energy Efficiency

Almost half the energy used in Australian homes goes to powering heating and cooling devices.

By reducing your heat loss and gain, double-glazed windows and doors reduce your need for this electrical temperature control. As such, if you use double-glazed products throughout your home, you can reduce your energy costs by more than 20% compared to a home with single-glazed windows and doors. That’s some serious energy efficiency.


Condensation occurs when the moist air inside your home is exposed to a cooler surface such as a single-glazed window. While condensation is generally just an annoyance, it does have the potential to cause serious problems for your home.

Double-glazed products reduce the likelihood of condensation by removing its key cause – a cold window. The interior glass pane stays close to room temperature, reducing your condensation risk.

Acoustic Insulation

The space between the two glass panes in double-glazed windows and doors doesn’t just insulate you from temperature extremes – it also insulates you from external noises.

With double-glazing, special acoustic seals along with acoustic layers within the glass allow the glass panes – and the space between them – to absorb more sound energy. This reduces neighbourhood, traffic, and other external noise, keeping it where it belongs: outside.


Aesthetically-speaking, at Bradnam’s, all our double-glazed windows and doors have profiles that are uniform across the range. This means that they’re not just architecturally symmetrical with one another – they’re also architecturally symmetrical with our single-glazed products.

This gives you greater flexibility in choosing the most suitable windows and doors for you.

Double-Glazing vs Single-Glazing

As you can see, there are lots of benefits to choosing double-glazed windows and doors.

If energy efficiency and insulation against temperature and noise are what you’re looking for, double-glazed products are probably the way to go.

But if you’re still having trouble deciding, we recommend asking for a comparison quote, so you (or your client) can compare your single- and double-glazed options side-by-side, while still keeping the benefits we’ve discussed in mind.