Single vs Double Glazed Windows: Which One’s Right for Your Home?

When it comes to choosing the right windows for your home, the type of glazing you go with can make a real difference not just in comfort, but in energy bills, noise levels, and even resale value. If you’ve ever stood by a chilly window in winter or heard traffic blaring through your walls, then you already know how much windows matter.

At Fast Glass 24 Hrs 7 Days, we often get asked: “Should I go for single or double glazing?” It’s a great question and the answer isn’t always straightforward. So in this article, we’ll walk you through everything you need to know to make an informed choice.

What Are Single Glazed Windows?

Let’s start with the basics. A single glazed window is made up of just one layer of glass. That’s it. It’s the most basic type of window and the oldest.

They’re commonly found in older homes and buildings across Australia. While they were the standard for many decades, they’re now considered less energy-efficient and not ideal for homes in colder or noisier areas.

Why people still use them:

• Lower upfront cost

• Works in detached spaces like sheds or garages

• Keeps the “heritage” look of older homes

But there’s a trade-off. You’re not getting the insulation benefits of more modern window options.

What Are Double Glazed Windows?

Now, picture this: instead of one pane of glass, you’ve got two panes, separated by a sealed air gap. That’s double glazing. That gap is often filled with argon gas, which makes it even more insulating.

The result? A window that’s better at keeping your home warm in winter and cool in summer. It also blocks out a lot more noise.

Real-life example:
One of our customers in Melbourne’s inner suburbs recently upgraded from single glazing to double glazing in their front rooms. Not only did their energy bills drop noticeably within three months, but they also said they could finally sleep through the night without being woken by trams or late-night traffic.

Key Differences at a Glance

Energy Efficiency: What the Numbers Say

Let’s talk about what really matters to many homeowners: energy use and bills.

According to YourHome, windows can account for up to 40% of a home’s heat loss in winter and up to 87% of heat gain in summer. That’s massive. And that’s where double glazing makes a real impact.

Studies show that double glazed windows can reduce energy loss by up to 60% compared to single glazed options. That could mean hundreds of dollars in energy savings per year, especially in places like Sydney, Melbourne, or Canberra where temperatures fluctuate.

Noise Reduction: A Quieter Home, Guaranteed

If you live near a busy road, school, or train line, you know how exhausting noise pollution can be. One of the biggest perks of double glazing is the way it dampens sound.

Double glazed windows can reduce outside noise by up to 70%, depending on the thickness and spacing of the glass. If you’re someone who values peace and quiet especially in bedrooms or home offices this is a game-changer.

Is Single Glazing Ever a Good Option?

Absolutely. If you’re on a tight budget or you’re renovating a non-living space like a garage, garden shed, or detached workshop, single glazing can still do the job.

And if you live in a mild climate and your home has good insulation elsewhere, you may not need the full benefits of double glazing.

But keep in mind: over time, lower upfront costs can turn into higher energy bills.

Double Glazing: Long-Term Value That Pays Off

While double glazing costs more initially, it’s an investment that usually pays for itself over time.

You’ll benefit from:

• Lower power bills

• Fewer maintenance issues (thanks to reduced condensation)

• Higher resale value a big plus in today’s competitive housing market

We’ve even seen clients get up to 10% more on their home sale price after upgrading windows. And in many Australian states, energy-efficient home features are becoming more sought after by buyers.

Can I Upgrade from Single to Double Glazing?

Yes, you can. There are two main approaches:

1. Full window replacement – Ideal for major renovations.

2. Retrofit double glazing – A quicker solution that fits new glass into existing frames (in some cases).

Either way, it’s best to chat with a professional to figure out the most cost-effective option for your property.

Final Thoughts: Which One’s Right for You?

It really comes down to what matters most to you:

• If you’re looking for affordable, short-term window solutions for non-essential spaces, single glazing might do the trick.

• But if you want a comfortable, energy-efficient, and peaceful home double glazing is the clear winner.

Why Choose Fast Glass 24 Hrs 7 Days?

At Fast Glass 24 Hrs 7 Days, we’ve helped countless Australian homeowners upgrade their glazing quickly, safely, and professionally. Whether you’re looking to replace a single pane or retrofit your whole home, our team is available 24/7 to assist you.

We pride ourselves on offering honest advice, top-quality glass, and fast, friendly service. Let us help you create a home that’s warmer, quieter, and more energy-efficient.

Got questions? Get in touch with us anytime. We’re always here to help.