Independent Way Ravenhall, Vic 3023

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Knauf Earthwool® Underfloor Insulation Batts

From: $8.46 sq m

Actual Area (sq m)
Total Price

Save Electricity with Underfloor Insulation Batts

A better insulated home requires less internal heating and cooling to maintain the desired temperature. This of course lessens the load on air-conditioners and any other heating or cooling appliances. The Earthwool R2.5 is technically a wall insulation product, but is perfect for under-floors, especially in Australia’s cold mountainous regions where the absence of underfloor insulation will be very noticeable. The R2.5 batts are 90mm thick, which often coincides with the thickness of the underfloor joists. If the floor joists are spaced evening at 450mm spacing from the centre of one joist to the centre of the next – then the R2.5 Earthwool Batt will sit snugly between the joists and will not require any strapping or tape to hold them in place. Nonetheless, to be certain that the insulation will remain intact and in place for the life of the home, it’s strongly recommended to run some strapping or similar across the underside of the joists, in a perpendicular direction to the joists.

Earthwool Underfloor insulation is available in different R-values to suit practically every climate.

  • R2.0HD | 430mm Earthwool Thermal and Acoustic Insulation Batts
  • R2.0HD | 580mm Earthwool Thermal and Acoustic Insulation Batts
  • R2.5HD | 430mm Earthwool Thermal and Acoustic Insulation Batts
  • R2.5HD | 580mm Earthwool Thermal and Acoustic Insulation Batts

A popular alternative to ordinary glass-wool

Knauf Insulation manufactures a wide range of glass and rock mineral wool products for a variety of applications. As with all the products in the Earthwool range, which includes wall insulation and ceiling insulation, Knauf Earthwool Underfloor insulation is rot-proof, odourless, “non-hygroscopic” (doesn’t absorb air-born moisture), does not sustain vermin and will not encourage the growth of fungi, mould or bacteria. It is chemically neutral, does not contain impurities and comes with a 50 year warranty, which in effect means you can expect it to deliver energy savings for the life of your home.

Earthwool insulation has gained increasing popularity with both professional installer and D.I.Y. renovators due to its less itchy handling. The exceptional compression packaging means more coverage per bag, which reduces handling, transport and storage costs. Knauf Insulation is less dusty and main claim it’s also easier to cut and install than traditional types of glasswool insulation.


R-Value Width
Thickness (mm)Pack
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Data Sheet

Sound Shield Data Sheet       Sound Shield Data Sheet       Material Safety Data Sheet       Product Warranty

Csiro Fire Rating Report       Exova Performance Test

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Dear Valued Customer,

Thank you for visiting Oz Homes Insulation, we will finish trading for the year at 5:00pm Monday 18th December 2023 and re-open for business on Monday 15ndJanuary 2024

Our phone will not be attended during these times so please email through all enquires via our email or simply fill out our call back form with your enquire and will get back to you as soon as possible.