Earthwool R4.0 HD (140mm) Acoustic Insulation Batts – 430mm Wide

High-Density R4.0 Thermal & Acoustic Ceiling Insulation – 430mm Stud Spacing

Upgrade your home’s comfort with Earthwool R4.0 HD 430mm ceiling insulation batts — engineered for superior thermal performance, noise reduction, and energy efficiency in Australian homes.

Designed specifically for 430mm ceiling joist spacing, this high-density R4.0 insulation delivers excellent year-round temperature control while reducing heating and cooling costs.

Product Overview

Earthwool R4.0 HD is part of the premium Earthwool insulation range manufactured by Knauf Insulation. It uses advanced ECOSE® Technology, making it softer to handle and low in itch compared to traditional glasswool.

Ideal for:

• Residential ceilings

• Renovations & retrofits

• New home builds

• Energy efficiency upgrades

• Noise reduction between levels

📏 Specifications

• R-Value: R4.0

• Width: 430mm

• Application: Ceiling / Roof space

• Density: High Density (HD)

• Material: Glasswool with ECOSE® binder

• Combustibility: Non-combustible

• Formaldehyde Free: Yes

Perfect for standard 430mm ceiling joist spacing in Australian homes.

Why Choose R4.0 HD Ceiling Insulation?

R4.0 is one of the most popular ceiling insulation ratings in Perth and WA homes because it:

✔ Significantly reduces summer heat gain
✔ Helps retain warmth during winter
✔ Lowers energy bills
✔ Improves acoustic performance
✔ Meets NCC requirements for many WA builds

If you're building or upgrading, R4.0 provides an excellent balance between performance and cost.

Benefits of Earthwool HD Insulation

• Soft-touch fibres – easier and safer to install

• Low dust, low itch formula

• Odourless and rot proof

• Resistant to vermin

• Long-term thermal performance

• Made with recycled glass content

 Ideal For

• Residential homes in Perth & WA

• Ceiling upgrades for older properties

• Double-storey homes needing sound control

• Energy efficiency retrofits

• Builders looking for reliable, compliant insulation