Earthwool R4.1 (210mm) Insulation Batts – 580mm Wide

High-Performance R4.1 Thermal Ceiling Insulation for 600mm Joist Spacing

Earthwool R4.1 Ceiling Batts (580mm width) are designed for superior thermal performance in Australian roof spaces. With a thickness of 210mm and an R-Value of 4.1, this product delivers excellent year-round temperature control while improving energy efficiency and comfort.

Manufactured by Knauf Insulation using ECOSE® Technology, Earthwool is softer to handle, low itch, and free from added formaldehyde.

Product Specifications

• Product: Earthwool R4.1 Ceiling Batt

• R-Value: R4.1

• Thickness: 210mm

• Width: 580mm

• Length: 1160mm

• Coverage Per Pack: 9.42m²

• Application: Ceiling / Roof Space

• Stud / Joist Spacing: Designed for 600mm centres

• Non-Combustible: Yes

• Formaldehyde Free: Yes

Why Choose R4.1 Ceiling Insulation?

R4.1 is a high-performance ceiling insulation rating ideal for Perth and WA climates.

✔ Reduces summer heat transfer
✔ Helps retain warmth in winter
✔ Lowers heating & cooling costs
✔ Improves overall home comfort
✔ Suitable for energy-efficient builds

For homeowners building to higher energy standards or upgrading older insulation, R4.1 offers excellent thermal performance without jumping to the higher cost of R5.0.

Benefits of Earthwool Insulation

• Soft-touch glasswool fibres

• Low dust & low irritation during install

• Odourless

• Resistant to mould, vermin & rot

• Made using recycled glass content

• Long-term thermal stability

How Much Do You Need?

Each pack covers 9.42m².

To calculate:

1. Measure your ceiling area (length × width)

2. Divide total m² by 9.42

3. Round up to full packs