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R3.5 Insulation

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“R3.5 Polyester Ceiling Batts – 580mm Width” has been added to your cart. View cart

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  • Bradford Gold R3.5 ceiling batt 430mm wide for 450mm joist spacing

    Bradford Gold R3.5 Ceiling Batts

    $45.33 – $54.12Price range: $45.33 through $54.12 inc. GST
    52.1452.14
    $6.53 p/m2 inc. GST
    View products
  • R5.0 Ecowool Ceiling Batts 580mm wide

    Ecowool R3.5 Ceiling Batts

    $49.90 – $57.68Price range: $49.90 through $57.68 inc. GST
    49.89649.896
    $7.15 p/m2 inc. GST
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  • Bradford Polymax

    Bradford Polymax R3.5 430mm

    $122.10 per/pack inc. GST
    122.1122.1
    $30.60 p/m2 inc. GST
    Add to cart
  • Bradford Polymax

    Bradford Polymax R3.5 580mm

    $163.35 per/pack inc. GST
    163.35163.35
    $30.35 p/m2 inc. GST
    Add to cart
  • R3.5 Polyester 430mm Ceiling

    R3.5 Polyester Ceiling Batts – 430mm Width

    $37.62 per/pack inc. GST
    37.6237.62
    $12.46 p/m2 inc. GST
    Add to cart
  • R3.5 Polyester 580mm Ceiling

    R3.5 Polyester Ceiling Batts – 580mm Width

    $51.52 per/pack inc. GST
    51.52451.524
    $12.65 p/m2 inc. GST
    Add to cart
  • Earthwool R3.5 Ceiling

    Earthwool R3.5 Ceiling Batts

    $63.95 – $85.95Price range: $63.95 through $85.95 inc. GST
    63.95463.954
    $7.54 p/m2 inc. GST
    View products

R3.5 Ceiling Insulation

R3.5 ceiling insulation is one of the most commonly specified insulation ratings for Australian homes, offering a strong balance between thermal performance, cost, and ease of installation. Installed in the ceiling or roof space, R3.5 insulation helps slow heat transfer, keeping homes cooler in summer and warmer in winter, which can significantly reduce heating and cooling demand year-round.

This rating suits many Australian climate zones and aligns well with modern energy-efficiency expectations. For homeowners, R3.5 ceiling insulation is often one of the most effective upgrades you can make for comfort, especially in older homes where ceiling insulation may be thin, uneven, or missing altogether. For new builds, it provides a solid baseline that supports compliance without overengineering the system.

At Insulation Essentials, we regularly supply R3.5 ceiling insulation to builders, renovators, and homeowners looking for a dependable, widely accepted solution that delivers noticeable comfort improvements.

R3.5 Ceiling Insulation

Where R3.5 Ceiling Insulation is Commonly Used

R3.5 ceiling insulation is primarily used in residential ceiling and roof spaces, including single-storey homes, double-storey homes, townhouses, and renovations. It is suitable for installation above plasterboard ceilings in ventilated roof spaces, where it works as part of the building’s thermal envelope.

In addition to homes, R3.5 ceiling insulation is also used in light commercial buildings, such as offices, retail spaces, and community buildings, where improving thermal comfort and energy efficiency is a priority. When installed correctly, it helps maintain more stable indoor temperatures and reduces reliance on heating and air conditioning systems.

R3.5 insulation is particularly effective in retrofit projects. Upgrading ceiling insulation is often straightforward and delivers immediate benefits, making it a popular choice for homeowners improving comfort without major structural changes. We supply R3.5 ceiling insulation across Melbourne and regional Victoria, supporting projects of all sizes.

R3.5 Ceiling Insulation Installation

Correct installation is key to getting the most from R3.5 ceiling insulation. The insulation should be laid evenly, with full coverage and minimal gaps, and without excessive compression that can reduce performance. Care must also be taken around lighting, wiring, and roof penetrations to ensure both safety and effectiveness.

R3.5 ceiling insulation products supplied by Insulation Essentials are designed to meet Australian building standards and NCC requirements when specified and installed correctly. Different product types may offer additional benefits such as improved acoustic performance or ease of handling, so choosing the right insulation depends on the specific needs of the project.

When installed properly, R3.5 ceiling insulation provides long-term thermal comfort and energy efficiency without settling or loss of performance. If you’re unsure which R3.5 product best suits your ceiling space, our team is always happy to help you compare options and select an insulation solution that fits your home, budget, and build requirements.

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