Acoustic Windows in Melbourne: A Guide to Choosing the Right Specification

Acoustic windows in Melbourne are the right solution when outside noise is affecting your quality of life at home. Whether the source is a main road, a tram line, a railway, or a busy commercial strip, the sound that enters through your windows is often the dominant noise pathway in an otherwise reasonably insulated home. This guide covers what makes a window perform well acoustically, how performance is measured, and what Astellite offers for Melbourne homes with specific noise concerns.

How Acoustic Performance Is Measured in Windows

Sound reduction in windows is measured in decibels using the Rw or STC rating system, which quantifies how much sound energy a window attenuates across a standard range of frequencies. A higher Rw or STC rating indicates better acoustic performance.

For context, a standard single-glazed aluminium window typically achieves an Rw of around 25 to 28 decibels. A quality double glazed uPVC window with an optimised glazing specification and multi-point sealing can achieve Rw values of 35 to 42 decibels or more, depending on the glass and gap specification. Triple glazing with asymmetric pane thicknesses can push this further, which is particularly valuable for low-frequency noise sources like traffic and rail.

A reduction of 10 decibels is perceived as roughly halving the apparent loudness of a sound. The difference between an Rw of 28 and an Rw of 40 is therefore a very noticeable change in how quiet your home feels with the windows closed.

What Determines Acoustic Performance in a Window

Acoustic windows in Melbourne achieve their performance through a combination of glass specification, gap design, frame construction, and installation quality.

Glass Specification

The mass and thickness of the glass panes determine how much energy sound waves lose as they pass through. Using asymmetric glass thicknesses on the two panes of a double glazed unit, such as 6 millimetres on one side and 4 millimetres on the other, avoids the coincidence effect where matched thicknesses resonate at the same frequencies and create a weak point in the attenuation curve. Laminated glass, which bonds two glass layers with an acoustic interlayer, is another option for enhanced noise reduction at specific frequencies.

Gap Width

A wider gap between the panes provides more acoustic separation. Gaps of 12 to 16 millimetres generally provide better acoustic performance than narrower alternatives. Triple glazing provides two gaps, which further disrupts sound transmission.

Frame and Sealing

Multi-point locking systems that compress seals evenly around the full frame perimeter eliminate the air pathways that allow sound to bypass the glass. Rigid uPVC frames with multi-chamber construction do not flex under pressure and contribute to the overall acoustic performance of the system.

The Window Range

Astellite manufactures acoustic windows in Melbourne across a full range of styles using German-engineered Aluplast uPVC profiles and high-performance glazing. The range includes tilt and turn windows, fixed windows, awning windows, sliding windows, bifold windows, bay windows, corner windows, and custom windows.

Every window is custom manufactured to your home’s exact dimensions and installed by Astellite’s own team. Astellite holds accreditation from AGWA and WERS, and all products meet Australian building and safety standards. Every installation is backed by a 10-year warranty.

Get a Free Quote Today

Astellite services homes in Melbourne, Geelong, Melton, and the Mornington Peninsula. Contact us today to arrange your free measure and discuss the right acoustic window specification for your home.