Does Wall Insulation Reduce Noise?

Matt Keane
April 4, 2024

Are you struggling with noise disturbances in your home? If you're constantly being disturbed by external noises like traffic, neighbours, or even the wind, you might have considered various solutions to reduce this issue. One effective measure that often comes to mind is wall insulation.

But does wall insulation reduce noise in Ireland? In this blog, we will explore how wall insulation can help reduce noise, enhancing your living or working environment significantly.

What is Noise Pollution and How Does Wall Insulation Reduce Noise in Ireland?

Noise pollution is defined as “any unwanted or disturbing sound that affects the health and well-being of humans and wildlife.” This type of pollution compromises the quality of life and can lead to a range of negative health outcomes, including stress, poor sleep, and even cardiovascular diseases. In urban and suburban areas, noise pollution is typically generated by traffic, industrial operations, constructions, and social activities.

In Ireland, where both urban density and environmental awareness are on the rise, wall insulation plays an important role in reducing noise pollution. By using materials such as fibreglass, stone wool, or specialised acoustic foam in building walls, sound waves are absorbed or blocked before they can enter living spaces. This reduction in noise not only enhances the comfort and quality of life inside homes but also contributes to broader public health goals by creating quieter, more peaceful urban environments.

What are the Different Types of Wall Insulation?

Wall insulation is an important component in building construction, especially for enhancing energy efficiency and noise reduction. Following are the types of wall insulation that can help homeowners and builders to select the best options for their specific needs.

Fibreglass Insulation

Fibreglass is one of the most commonly used insulation materials due to its cost-effectiveness and thermal performance. It consists of finely woven silicon, glass powder, and tiny shards of glass, all of which are excellent for trapping air and reducing the flow of heat. Fibreglass is available in batts and rolls which can be easily fitted between wall studs and joists. However, it requires careful handling to avoid irritation of skin and lungs due to its fine particles.

Foam Insulation

Foam insulation includes materials such as spray foam and rigid foam boards. Spray foam expands to fill cavities and can provide an airtight seal, making it ideal for preventing air leaks in addition to insulating.

Rigid foam boards offer a higher R-value per inch compared to other types and are perfect for external wall insulation. They can be used to insulate almost any part of the home, from the roof down to the foundation.

Mineral Wool Insulation

Also known as rock wool or slag wool, mineral wool insulation is made from molten glass, stone, or industrial waste that is spun into a fibre-like structure. It offers superior fire resistance and acoustic properties, which make it an excellent choice for soundproofing as well as thermal insulation. Mineral wool does not absorb water, preventing the common problems associated with moisture, such as mould and mildew.

Cellulose Insulation

Cellulose insulation is made from recycled paper products, primarily newsprint, and treated with chemicals to provide fire and insect resistance. It is an eco-friendly option that has a high R-value and excellent sound absorbing properties. Typically installed using a blowing machine, cellulose can be a good choice for retrofitting existing homes because it easily conforms to odd-shaped spaces and it effectively seals small gaps.

How to Choose the Right Insulation for Reducing Noise in Your Irish Home?

Choosing the right insulation for your home is critical, not just for thermal efficiency but also for effective noise reduction. In Ireland, where weather conditions can vary unexpectedly, selecting the proper insulation can help maintain a peaceful indoor environment.

Understand the Types of Noise in Your Home

Before choosing insulation, it’s important to identify the types of noise you want to reduce from your home. Are you dealing with airborne noise (like conversations, music, and traffic) or impact noise (such as footsteps or items dropping)? Different insulations are better suited for different types of noise, with materials like mineral wool and dense foam being particularly effective against airborne noise due to their mass and density.

Consider the Insulation Material’s Soundproofing Qualities

Not all insulation materials are created equal when it comes to soundproofing. Materials such as fibreglass and foam are popular for thermal insulation but may not provide the best sound insulation. On the other hand, materials like mineral wool and cellulose are denser and provide better noise reduction by dampening vibrations and absorbing sound. Enhancing the sound transmission class (STC) rating of the insulation can also provide effectiveness at blocking noise.

Assess the Installation Areas

The areas of your home that you choose to insulate can significantly impact its overall quietness. For maximum noise reduction, consider insulating walls, floors, and ceilings. Walls are the most common insulation areas for noise control, especially external walls that face busy streets. Additionally, insulating the attic can prevent external noises from entering through the roof, and floor insulation can help to reduce impact noises.

Check for Compatibility with Your Home’s Structure

The compatibility of insulation material with your home’s existing structure is important. Some homes, especially older models with unique architectural features, may not be suitable for certain types of insulation without significant modifications.

It's essential to consult with a professional to understand which materials would fit best with your home’s construction type and to ensure that the installation process will not affect the structural integrity or cause other issues like moisture accumulation.


To wrap up, wall insulation plays an important role in reducing noise pollution in Irish homes. Understanding the types of noise, selecting the appropriate insulation material, targeting key installation areas, and ensuring compatibility with your home's structure are crucial steps for effective soundproofing. Whether it's addressing airborne disturbances or diminishing impact noise, the right insulation can significantly enhance the peace and comfort of your living environment.

Ready to transform your home into a peaceful, noise-free place? Contact Build Tech today for a consultation. Our experts are committed to providing you with the best insulation solutions that are custom-fit to your needs. Enhance your home's comfort and quiet with Build Tech. Call us or visit our website to learn more and get started on your journey to a quieter home.

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