Choosing the right wall insulation depends on your wall type, climate zone, and whether you’re building new or retrofitting. We provide effective solutions for all wall types, including:
Insulating Different Wall Types
- Cavity brick and brick cavity wall insulation – Common in older or double-brick homes, these walls have a gap between the inner and outer layers of brick. Cavity wall insulation fills this space, reducing heat loss in winter and heat gain in summer for better year-round comfort.
- Double brick insulation – Double brick walls are strong and durable, but without insulation, they can allow significant heat transfer. Adding double brick wall insulation improves thermal performance without affecting the wall’s structure or appearance.
- External wall insulation – Applied to the outside of your home, external home insulation acts as a continuous thermal layer. It improves comfort, reduces heating and cooling costs, and enhances energy efficiency. Our external wall insulation products are designed to withstand harsh Australian conditions and comply with national building standards.
- Internal wall insulation – A great option for soundproofing and maintaining consistent temperatures between rooms. Internal insulation is ideal for multi-storey homes, townhouses, and duplexes, where noise control and thermal separation are important.
Retrofit Wall Insulation Made Easy
If you want to insulate your walls—including existing exterior walls—without removing the drywall, we offer smart, low-disruption solutions suitable for homes across Australia. Our retrofit wall insulation range is designed to improve thermal performance and comfort with minimal structural changes.
This includes foam wall panels, insulation wrap, and thermal wrap products. These can be installed either on the inside or outside of your home, depending on your wall type and access. They are ideal for older homes or renovations where traditional insulation methods aren’t practical.
Our range includes:
- Wall wrap, sisalation wrap, and building wrap for added moisture and thermal protection.
- Vapour barriers and moisture barriers for walls to help prevent condensation and protect internal structures.
- Wall sarking and insulation wrap for enhanced performance in windy or humid conditions.
Why Choose Us?
If you’re considering insulating the external walls of your home or outdoor areas to improve thermal performance, we offer a range of high-quality solutions. Our products—including external insulation, exterior wall insulation, and foam for walls—are specifically designed to meet the demands of Australian homes across various climate zones.
External wall insulation is ideal for both new builds and retrofit projects, helping to reduce heat loss in winter and heat gain in summer. It also enhances acoustic performance and protects your building envelope from weather damage. Whether you’re insulating a brick cavity wall, double brick, or a lightweight external wall, we have tailored options to suit your structure and goals.
We also support homeowners in selecting the best roof insulation for hot climates, ensuring that your entire building envelope—from walls to roof—is thermally efficient. Our expert advice helps you choose compatible products that work together to improve comfort, reduce energy bills, and support sustainability goals.
These solutions are especially valuable in high-demand areas like Canberra and the ACT, where seasonal temperature extremes make effective insulation a smart long-term investment.
Choosing the Right Wall Insulation for Your Home
Every home is unique, and selecting the right wall insulation depends on several factors including your home’s construction type, geographic location, and your specific comfort and energy efficiency goals. Whether you’re looking for external wall insulation in Australia, double brick insulation for traditional masonry homes, or foam for walls as part of a retrofit project, we can guide you to the best solution that maximises thermal performance, durability, and long-term value.
If you’re unsure where to begin—whether you need advice on retrofit wall insulation, the best vapour barriers for walls, or methods for insulating external walls internally—our experienced team is ready to help. We understand the challenges of different wall types and climates and can recommend the right products and installation techniques to suit your home.
From advanced sisalation wall wrap that offers moisture and thermal protection to high-quality foam wall panels designed for easy installation and superior insulation, we provide a comprehensive range of solutions. Together, these products help improve your home’s energy efficiency, reduce heating and cooling costs, and ensure comfortable indoor temperatures throughout the year.
Partnering with us means you get personalised guidance to create an insulation system tailored to your home’s needs—helping you invest smartly in comfort, sustainability, and long-term savings.
Explore our Wall Insulation Products
Frequently Asked Questions
What is the fire performance of Earthwool® insulation?
Earthwool® insulation is non-combustible and complies with the requirements of the Australian Standard AS1530.1 1994.
What is the acoustic performance of Earthwool® Ceiling insulation?
All Earthwool® products will provide some acoustic performance, as glasswool insulation comes with inherent sound absorbing properties.
Are vermin or insects attracted to Earthwool®?
No. Earthwool® insulation has been tested to show that it will not sustain vermin or attract insects.
Can I use Earthwool® Ceiling batts in my walls?
No. Earthwool® Ceiling batts are not designed to be used in walls and should not be compressed (squashed). Compressing Earthwool® insulation will reduce the thermal performance (R-Value) of the product and could potentially cause future issues, as the products are designed to recover to their specified thickness.
Why is Earthwool® softer and less itchy than traditional glasswool?
Earthwool® uses a combination of new technologies, which make the product more comfortable to handle. Firstly, Knauf Insulation’s proprietary fiberisation process creates longer strands resulting in less ‘ends’, to reduce mechanical irritation. Secondly, Knauf Insulation’s patented ECOSE® Technology results in a much softer, less ‘crunchy’ and less dusty insulation product compared to traditional glasswool products made using formaldehyde.
Why is Earthwool® brown?
The distinctive brown colour of Earthwool® results from ECOSE® Technology. This natural binding process leads to a natural shade of earthy brown – free from dye or colourants. This is a result of five years of intensive research and development, as part of our commitment to being at the forefront of sustainability. In some cases, if Earthwool® is exposed to UV radiation, it may result in a white bleaching effect, however product performance is not diminished.
How does the use of ECOSE® Technology make Earthwool® more sustainable than traditional glasswool products with formaldehyde?
ECOSE® Technology is more sustainable because it uses a natural resin, which is less energy intensive than traditional formaldehyde binders. With ECOSE® Technology, rapidly renewable, organic materials replace the traditional petro-based chemicals used in standard insulation binders to create more advanced and sustainable products. ECOSE® Technology is formaldehyde free.
What testing has Earthwool® with ECOSE® Technology gone through?
Earthwool® products have undergone a comprehensive and rigorous evaluation to determine their environmental effects and acceptability in use, and indicate that products with ECOSE® Technology improve on the already excellent performance of conventional glasswool products. As with all Knauf Insulation products, Earthwool® has been independently appraised with BRANZ to comply with Australian Standards. Also, Earthwool® insulation is certified by Eurofins Gold as an ‘outstanding material’, according to the VOC (Volatile Organic Compounds) Indoor Air Quality emissions regulations. Earthwool® was awarded Eurofins Scientific’s first Indoor Air Comfort Gold Standard certificate as part of the Eurofins Air Comfort Gold standard testing and certification programme.
Why does the Earthwool® insulation packaging look different in store?
We’re currently in the process of updating some of our packaging, so you may find that the images shown here on our website vary slightly from what you see in store. The products within the packaging are of the same high quality though, so be sure you check the specs on the outside to make sure you’re buying the right insulation for your needs.
Check out our official Wall Insulation Installation Guide.
It will show you how to prepare, install and complete your project efficiently
View Guide
