Soundproof Windows – Retrofit Secondary Glazing Solutions
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Soundproofing Existing Windows
At Stop Noise, we specialise in soundproofing existing windows in both residential and commercial properties using our proven add-on secondary glazing system. This solution is specifically designed to retrofit your current windows, significantly improving acoustic performance without the need for full replacement.
Our secondary soundproof windows are installed within the existing window frame and are designed to slide open easily, providing full access for ventilation and cleaning.
The key to effective window soundproofing lies in creating a wide air gap—ideally around 100mm—between the original glass and the secondary pane. This gap acts as a buffer zone, helping to baffle airborne noise before it enters your space. Each sash is fitted with heavy-duty 6.38mm laminated safety glass and double acoustic seals to maximise noise reduction. For commercial settings or higher noise environments, we also offer a 10.38mm laminated glass system for even greater acoustic performance.
Achieving true peace and quiet is simpler than you might think. For nearly 30 years, Stop Noise has led the way in high-performance soundproofing windows for Australian homes and businesses. Our proven method involves installing a discreet second window inside your existing one, creating an acoustic shield that reduces noise by up to 70% without the cost or chaos of a full replacement.
Does Soundproofing Existing Windows Work?
Our add-on double glazing system has undergone independent acoustic testing and has been proven to reduce noise to a level comparable with that of a brick veneer wall. With nearly 30 years of experience solving noise problems for Australian homes and businesses, we stand by our process and guarantee expert advice tailored to your situation.
Book a free onsite quote today, and one of our consultants will visit your property, assess your needs, and provide a detailed noise test report.
Installation Method & Materials
We use 6.38mm laminated safety glass for most homes, and 10.38mm for commercial projects that demand higher acoustic performance. A large air gap (70–100mm) between the two panes dramatically reduces noise transmission—particularly low-frequency sounds like traffic rumble.
Benefits of Soundproof Windows
Our secondary glazing system delivers three powerful benefits in one smart upgrade:
Our system is lab-tested to reduce noise by a minimum of 50%, with results often reaching 70%. This effectively silences the daily disruption from traffic, construction, and noisy neighbours.
The same air gap that blocks sound provides exceptional window insulation. This means less reliance on your heater and air conditioner, leading to lower energy bills and a more comfortable indoor temperature, whatever the season.
Because our system fits directly onto your existing windows, there is no need for costly and messy structural changes. Installation is quick, clean, and preserves your home’s original look.
Why Choose Stop Noise for Soundproof Windows in Sydney & Victoria
Our commitment to quality, backed by decades of experience, is what sets us apart. When you partner with Stop Noise, you can depend on:
- Trusted Australian Experts: A family-owned business with nearly 30 years of proven soundproofing experience.
- Locally Made for Quality: We manufacture our own systems, guaranteeing end-to-end quality control.
- Dedicated Local Service: Our professional teams provide expert installation for soundproof windows in Sydney and across Victoria.
How Our Soundproof Window System Compares
Our retrofit system is often more effective than full double glazing—especially for blocking low-frequency sounds like traffic. The larger air gap in our design provides better acoustic insulation than most sealed double-glazed units.
Independent acoustic testing has shown that a window fitted with our system can perform like a standard brick veneer wall—making it ideal for everything from family homes to recording studios.
Frequently Asked Questions
How effective are soundproof window inserts?
Our secondary glazing system is extremely effective. We guarantee a minimum noise reduction of 50%, with most clients experiencing up to a 70% reduction. They make a remarkable and immediate difference.
How to soundproof windows without replacing them?
The best way is with our retrofit double glazing solution. We add a second internal window to your existing frame, giving you all the benefits of soundproofing without the cost and hassle of replacement.
Will soundproof windows affect how my windows open?
Not at all. Our system is designed to allow your original windows to function exactly as they did before. You can still open them for fresh air and cleaning with ease.
See How Affordable a Quiet Home Can Be
Find out exactly what it takes to solve your noise problem. Our free, no-obligation quote is tailored to your specific windows and gives you a clear path forward.
Stop Noise is the ultimate solution for reducing noise through your windows.
Our double glazing system is easily added to existing windows at half the cost of Replacement double glazed windows.
Contact US
Get In Touch
- 1800 880 844
- (03) 9775 0550
- info@stopnoise.com.au
- 15 Industry Boulevard Carrum Down VIC 3201
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We provide a quote online within 24 hours.