Is Soundproofing Your Windows Worth It in Perth?

Is Soundproofing Your Windows Worth It in Perth?

If you live in Perth, chances are you have had at least one of “that noise again” moment. Maybe it is early-morning traffic building up on an arterial road. Maybe it is weekend life nearby, a neighbour’s renovation, a barking dog or the steady hum that seems to travel through the house when the wind picks up. And if you are anywhere near major transport corridors or changing flight paths, you may find the sound is not occasional. It is constant.

So, is soundproofing your windows worth it?

For many Perth homeowners, the answer is yes. It is no longer a luxury upgrade; it has become a necessity to keep your home comfortable. Windows are often the biggest weak point in the home when it comes to noise, comfort, and energy efficiency. Once you reduce what comes through the window and door, the whole house will feel quieter and more comfortable.

Why Windows Are Usually The Problem

Noise does not need a big opening to get inside. Sound travels through:

  • Thin glass (especially single glazing)
  • Small gaps in frames, sashes, and sliding tracks
  • Air leaks around older window seals
  • Doors and large glass panels that face the street

For homes in Perth, this becomes more noticeable because many properties feature large panes, sliding doors and open-plan layouts. That means there is more glass surface area and more opportunity for sound to travel through.

If you can feel air movement around a window on a windy day, sound is travelling through there too.

Noise Reduction: The Obvious Benefit (And The One That Changes Daily Life)

Most people look into window soundproofing for a one simple reason – to make their home more comfortable.

Common Perth noise sources include:

  • Traffic noise from busy roads
  • Construction and development in established suburbs
  • Train lines and freeway corridors
  • Late-night venues and foot traffic in nearby activity zones
  • Leaf blowers, bins day, deliveries and early morning suburb noise
  • Wind noise and whistling from poor seals when the Fremantle Doctor rolls in

The difference after improving window insulation is not always “complete silence” (that is rarely realistic). It is a manageable indoor noise level.

Instead of hearing every passing car, you notice far less of the sharp, high-frequency sound. Instead of waking up early, you sleep deeper. Instead of turning the television up, you leave it where it should be.

And the best part is you usually do not need to treat all windows at once.

Most homes have one or two sides where noise is worst, so you can start with the bedrooms or living area that are affected the most.

Home Privacy: Soundproofing Works Both Ways

People often think soundproofing is only about keeping outside noise out, but it also helps keep inside noise in.

That matters more than most homeowners expect.

If your home has:

  • A baby’s room near a shared fence line
  • A musician or gamer in the household
  • A home theatre setup
  • Teenagers on calls late at night
  • Zoom meetings in an open-plan space

…sound insulation becomes a privacy upgrade as much as a comfort upgrade.

You should not need to tiptoe around your own home and you also should not have to worry about neighbours hearing everything you do. A properly soundproofed window system helps create separation, so the home feels more liveable for everyone.

Your Health: The Hidden Cost Of “Just Living With It”

Noise does not only irritate you. It affects your body.

Ongoing exposure to unwanted noise can contribute to higher stress levels and can disrupt your ability to properly rest and recover. Sleep quality suffers first, and once sleep is impacted, everything else follows:

  • Lower concentration during the day
  • Reduced patience and higher irritability
  • Difficulty switching off mentally
  • More fatigue and less motivation
  • A general sense of feeling “on edge” at home

Perth is a lifestyle city, and home should be the place you reset. If noise is stopping that, soundproofing is not just a home improvement. It is a wellbeing decision.

How Window Soundproofing Actually Works (And Why “Airtight” Matters)

Effective soundproofing is not only about thicker glass. It is about two core things:

1) Creating an air cavity

By creating a larger air cavity between two layers of panes, secondary double glazing such as Magnetite systems delivers outstanding thermal and acoustic performance – often outperforming traditional double glazing. The optimum air gap acts as an effective barrier, slowing sound transmission, reducing vibration transfer, and improving overall noise reduction and energy efficiency within the building.

2) Reducing air leaks

Sound loves gaps. Even tiny gaps can let in surprising levels of noise, especially higher frequencies like voices, tyres on road surfaces or squealing brakes.

If air moves, sound moves. That is why a properly sealed window system is so important. You can install heavy curtains and rugs (which help), but if the window itself still leaks air, noise will keep coming through.

Return On Investment: It Is Not Just About Noise

Soundproofing is often the “headline” benefit, but most Perth homeowners experience thermal improvement after upgrading windows:

Their home becomes more comfortable all year round.

Even in Perth’s generally mild winters, you still get cold nights and seasonal fronts. And in summer, Perth heat can be relentless, especially in homes with large west-facing glass.

Better window insulation can help:

  • Reduce heat gain in summer
  • Reduce heat loss in winter
  • Lower reliance on air conditioning
  • Create fewer hot and cold zones between rooms
  • Improve the overall “stillness” of indoor temperature

When your home stops leaking air through glass and gaps, your heating and cooling system can operate more efficiently. That means better comfort, and lower energy bills over the time.

So, the return in the long term is not just a more comfortable home, there is also a practical cost benefit.

The Best Soundproofing Option For Perth Homes: Retrofit Double Glazing Windows

Full window replacement is one of the option to improve your window but it is not always the best one, especially when you want:

  • Less disruption, quick installation
  • Cost effective solution
  • A solution that fits your existing window, no replacement window
  • Minimal change to the aesthetic look of your home

That is why retrofit double glazing window solutions have become so popular.

Rather than replacing your windows, a secondary glazing window system is installed to the inside of your existing window reveal, creating an optimum air cavity and an air tight seal.

For Perth homes, this is particularly useful because:

  • Many properties have large sliding windows and doors.
  • Coastal homes often deal with wind and air leaks.
  • Heritage properties and strata unit may require keeping the existing window.
  • Replacement can be expensive and messy compared to retrofitting.

Magnetite’s Retrofit Double Glazing or even Soundtite window solutions are designed to reduce outside noise through existing windows and doors by up to 70% while also improving thermal performance and comfort.

So… Is Soundproofing Your Windows Worth It?

If you are constantly dealing with unwanted noise, window soundproofing is worth it for one simple reason: It improves the quality of your everyday life.

You sleep better. You focus better. You feel calmer at home. Conversations are easier. Your home feels more private. And as a bonus, indoor temperature becomes more stable across summer and winter.

Perth is only becoming busier. Roads get upgraded, suburbs densify and activity zones stay active. Noise rarely decreases over time. But your comfort does not have to take the hit.

If you want to reclaim quiet in a way that is practical, targeted, and suited to Perth conditions, start with the windows that face the noise and build from there.

Magnetite can assess your home, identify where noise is entering and recommend the most effective retrofit solution for your windows and doors.

Get in touch with the Magnetite Perth team for a free measure and quote.

  1. Conduction
    Heat moving through an object (i.e. heat will travel through an aluminium, or steel frame more easily than through a timber or PVC frame).
  2. Radiant heat
    Heat from the direct sun. It can pass through space until reflected or absorbed.
  3. Convection
    Heat flow resulting from air movement e.g. either 'natural' convection - warm air rises, or 'forced' convection - a breeze by a window, both can result in a draught by a window.
  4. Infiltration
    Air leaks around the frame, around the window sash and through the gaps in the movable window parts.

When evaluating your options to improve the thermal performance of your windows, the following double glazing key performance criteria should be considered:

  • U-Value (Uw) represents heat transfer through a window, irrespective of direct sunlight. The lower a window’s U-Value, the better the insulation performance.
  • Solar Heat Gain Coefficient (SHGC) measures the solar energy that passes through glazing. The lower the SHGC, the less solar heat is transmitted through a window.
  • Air Infiltration or leakage measures the rate at which air passes through gaps in window joins and seals. The lower the air infiltration, the better a window’s energy performance.

The Window Energy Rating Scheme (WERS) Thermal Performance

Aluminium Frame Windows

Glazing Type Cooling Stars Heating Stars Cool% Heat% Uw SHGC
Single glazed 3mm clear glass* half blue star red starhalf red star 7.4 0.77
Single glazed 3mm clear glass &
4.5mm Magnetite
blue starblue starhalf blue star red starred starred starred starred starhalf red star 35% 59% 2.9 0.67

Timber Frame Windows

Glazing Type Cooling Stars Heating Stars Cool% Heat% Uw SHGC
Single glazed 3mm clear glass* blue starhalf blue star red starred starred starhalf red star 20% 28% 5.5 0.69
Single glazed 3mm clear glass &
4.5mm Magnetite
blue starblue starhalf blue star red starred starred starred starred starred star 37% 61% 2.6 0.66
Single glazed 3mm clear glass with
Solartite** and 4.5mm Magnetite
blue starblue starblue starblue starblue starblue starhalf blue star red starred starred starred starhalf red star 76% 45% 1.8 0.20

 

*WERS standard typical industry window
**Solartite is a range of high performance window film. The window tested above has Solartite’s low-e film.


Magnetite vs Traditional Double Glazing – What the experts says

Winter - the ideal situation is to let in as much of the sun's heat and then trap it inside to maintain a comfortable environment in your home or office. This will also significantly reduce heating costs and saves you money. The ideal window for winter will have a high SHGC to let the sun's heat in and a low U-Value to prevent the heat from escaping. Clear windows without shading films are better suited for winter climates.

Compared with traditional double-glazing, Magnetite’s double-glazing solution can provide better results during winter or for cold climate areas such as Canberra, the Adelaide Hills and Blue Mountains.

Magnetite's clear acrylic window panels allow the direct heat from the sun's rays to enter the building and once inside, Magnetite's superior magnetic seals retain the heat, giving Magnetite an advantage over conventional operating windows.

Glazing Type Cooling Stars Heating Stars Cool% Heat% Uw SHGC AI
Double Glazed 3mm clear glass/12mm air
gap/3mm clear glass IGU (Insulated Glass Unit)*
blue starblue starhalf blue star red starred starred starred starred starhalf red star 40% 55% 3.0 0.61 5.0
Single glazed 3mm clear glass &
4.5mm Magnetite
blue starblue starhalf blue star red starred starred starred starred starred star 37% 61% 2.6 0.66 0.5

 

*WERS standard typical industry window

Summer - the ideal situation is to minimize the heat coming in from outside and prevent the cool air inside from escaping through the window. This will make your home more comfortable and reduce your air-conditioning costs. The ideal window for summer, or for a large west-facing window, will have a low SHGC to limit the heat from the sun's direct rays, as well as, a low U-Value to prevent the heat in the air outside from moving through the window and warming the cool conditioned air inside. It is better to have a shading film on the first (outer) glass pane to limit the heat that enters the double glazed unit.

The combination of Magnetite retrofit double glazing and Solartite outperforms the traditional insulated glass unit for hot climate. Magnetite fit over an existing window with reflective film will give better summer heat control than a double-glazed window with supertoned glass.

The Magnetite system stops the conduction and convection of heat better than glass windows giving superior results for summer conditions. Combined with a film or a shading device, Magnetite is the ideal solution for the hot Australian conditions.

Glazing Type Cooling Stars Heating Stars Cool% Heat% Uw SHGC AI
Double Glazed 5mm Supertoned glass/6mm
air gap/5mm clear glass IGU (Insulated Glass Unit)*
blue starblue starblue starhalf blue star red starred starred starred starhalf red star 54% 425% 3.30 0.461 5.0
Single glazed 3mm glass Solartite**
and 4.5mm Magnetite
blue starblue starblue starblue starblue starhalf blue star red starred starred starred star 73% 38% 2.4 0.19 0.5

 

*WERS standard typical industry window
**Solartite is a range of high performance window film. The window tested above has Solartite’s low-e film.

Click here to view pdf version of Magnetite WERS test result.

Noise Reduction Technical Data and Results

Proven Results

Noise pollution is one the biggest problems faced in the cities today, particularly in a high-density living. Unwanted noise can be responsible for sleep loss and lack of concentration. This can lead to a deterioration of health through increased stress levels, headaches, high blood pressure and loss of hearing.

Noise penetrates windows through leaky seals or vibrations through the window structure. To reduce noise, a window should minimise air infiltration, hold enough weight to limit vibration and allow a large air cavity. This cavity, or air gap, is the key to secondary glazing.

Expert Advice:

CSIRO Research by John Davy shown an air cavity can effectively enhance sound insulation performance. The larger the air cavity the more noise the window system can reduce. Results show a wide air gap of 100-125mm will improve sound insulation by an average of 7dB(A) more than windows with a narrow gap of 8-13mm.

Window or Glass Door Type Total Glass Thickness (mm) Air Cavity Thickness (mm) Sound Insulation (dB)
Single Glaze 3mm 3 0 23
Single Glaze 6mm 6 0 27
Double Glaze Narrow Gap 9-12 8-13 31
Double Glaze Wide Gap 9-12 100-125 38

 

The human ear is less sensitive to low frequency sound. According to a study released by the CSIRO, the human ear needs a change of 3dB to detect a difference in noise levels and the human ear perceives a change of 10dB as a doubling or halving of the noise level.

If you double the thickness of glass in a window the noise level will decrease by 3dB the least amount possible to make a difference. If the glass is laminated there is no perceived difference in noise reduction.

National Acoustic Laboratory Testing:

Working with the principles of noise transfer, Magnetite® and Soundtite are designed for high performance, which is achieved by combining air tight seals with the ability to maximize an air cavity and the flexibility to vary glazing thickness to suit. Magnetite® is excellent at reducing general noise such as busy roads, commuter trains and noisy neighbours. Whereas, Soundtite works well to combat low frequencies noise such as garbage truck, freight trains or airplane during take-off and landing.

Test Code Material Tested Rw* Improvement
ATF 707 (test window) Aluminium sliding window, 3mm float glass with mohair seals 23 N/A
ATF 709 Test window, 100mm air gap and Magnetite System (4.5mm acrylic panel) 35 52%
ATF 1507 Test window, 100mm air gap and Magnetite System (10.0mm acrylic panel) 39 70%
ATF 817 Test window, 100mm air gap and Soundtite (6.38mm laminated glass) 41 78%

 

*The Weighted Sound Reduction Index (Rw) is a measure for sound insulation performance of a single building element such as windows. The higher the Rw rating, the better the sound insulation.