Earthwool® R-3.5 Ceiling Insulation
Options:
175 x 430 x 1160
Depth x Width x Length (mm)
8.5
Area/pack (m²)
17
Pieces per pack
10.9
Net weight (kg)
175 x 580 x 1160
Depth x Width x Length (mm)
11.4
Area/pack (m²)
17
Pieces per pack
14.8
Net weight (kg)
Earthwool® R3.5 Ceiling insulation batt has efficient energy saving properties, enabling you to keep your home cool in summer and warm in winter. Read more
Benefits
- TwinTech® – smooth finish on both sides
- High thermal performance – year round comfort
- Sound absorbing
- Non-combustible
- Saves energy – lower energy bills
- No added formaldehyde
- Soft to handle and install
- Compression packed – more product per pack
- Odourless.
Earthwool® R-3.5 Ceiling Insulation Specs
Earthwool® R-3.5 Ceiling insulation has efficient energy saving properties, enabling you to keep your home cool in summer and warm in winter. It’s soft, made using up to 80% recycled glass, and comes in pre-cut rectangles at either 430mm or 580mm widths to suit most ceiling joist centres.
The Earthwool® Ceiling insulation batt range includes a selection of R-values to provide builders, designers, installers and DIYers the opportunity to choose the best thermal performance for their project. Earthwool® Ceiling insulation batt will improve the thermal comfort and energy efficiency of the building in which it has been installed thus keeping it cool in summer and warm in winter.
The soft and easy to handle benefits of Earthwool® insulation have been further enhanced with TwinTech®. TwinTech® heralds another advancement insulation manufacture — the dual forming technique ensures there is a smooth finish on both sides of the insulation, which improves product handling and appearance. Earthwool® Ceiling insulation batt is made using up to 80% recycled glass and with ECOSE® Technology, a sustainable, bio-based binder that contains no added formaldehyde.
Thermal
Fire Hazard Properties (AS/NZ 1530.3)
Water Vapour Absorption
Microbial Growth
Corrosion Resistance
Combustibility (AS 1530.1)
Pack Calculator
Use this tool to calculate how many packs of Earthwool required for your space.
Installing Ceiling insulation
If you’re planning to install your Earthwool® Ceiling insulation yourself, that’s great. We love it when people get into a bit of DIY, and we try to help as much as possible. But before you begin, please download and read the instructions from the link above, check out the short video and tips below, and always make sure you have the right tools on hand.
Installation Tips
Tools you’ll need
Sharp knife
Ladder
Tape measure
Non-conductive insulation stick
For positioning insulation in hard to reach areas
Kneeling board
to span ceiling framing
Get to know your Ceiling insulation
Below you’ll find a range of handy resources, including Earthwool® Ceiling insulation product specifications and technical data, installation guide and warranty details. There’s also some more general information covering the ECOSE® Technology behind your Earthwool® insulation and what makes it so superior, as well as useful safety information. Download each resource and take a look.
Helpful videos
Birdsville: insulated from weather extremes
Find out how Earthwool insulation has helped these Birdsville residents.
Insulating Internal Walls for Acoustic Performance
Help create a peaceful home by absorbing unwanted noise from travelling between internal rooms.
Top Tip for Installing Insulation
When installing insulation in a wall frame it is important to ensure you install insulation that matches the thickness of the frame.
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.
