Earthwool R3.5 Ceiling Insulation

Earthwool R3.5 Ceiling Insulation Batts (175mm)

Earthwool R3.5 ceiling insulation batts help reduce heat transfer through the ceiling. Available in 430mm and 580mm widths, these 175mm glasswool batts can be used in suitable new builds, renovations and insulation upgrades. Before ordering, check the required R-value, available space and condition of any existing insulation.

Benefits of Earthwool R3.5 Ceiling Insulation

• R3.5 thermal resistance at a nominal thickness of 175mm.
• A choice of 430mm and 580mm batt widths.
• Glasswool insulation that helps improve thermal comfort.
• Pre-cut batts for installation in suitable ceiling spaces.

For product information and supporting resources, visit the official Earthwool R3.5 ceiling insulation page.

Choosing Your Pack Size

• First, measure the spaces between the ceiling framing. Then compare your measurements with the available batt widths and check the pack coverage in our Specifications tab. Allow for the layout and cutting required rather than relying on floor area alone.
• If you are unsure about quantities, contact Home Insulation with your measurements before purchasing.

Installation and Existing Insulation

• Follow the manufacturer’s installation instructions for your product and ceiling construction. Batts need room to recover to their specified thickness, as compression affects thermal performance.
• In addition, check access, electrical equipment and required clearances before work begins. Use the manufacturer’s guidance for lights, wiring, flues and other fittings rather than assuming insulation can cover them.

For detailed instructions, read the Earthwool Ceiling Installation Guide.

Frequently Asked Questions

What does R3.5 mean?

R3.5 describes the material’s thermal resistance. However, the appropriate insulation specification depends on your building design and project requirements.

Can I add it over existing insulation?

An upgrade may be possible, but the existing material, available space and installation requirements need checking first. Ask for advice if the insulation is damaged, damp or uneven.

What should I use for walls?

For a wall project, browse our wall insulation products and select a product suited to the specified wall construction.

Can I collect my order?

Yes. Collection is available from Breakwater, Geelong. Select the collection option at checkout, or check delivery areas and charges if you need transport to your address.