Thermal Insulation

All the best brands, all under the one roof.

AGI is Australia’s only national, independent insulation distributor. Rather than being obligated to only supply the products of one manufacturer, AGI maintains its absolute independence so we are able to provide product recommendations based on a product’s merits. We carry an extensive range of standard and specialist thermal and acoustic insulation products suitable for new homes and additions, as well as retro fitting to existing homes.

Our range of insulation products and services includes: 

  • Ceiling insulation: predominantly using AGI, CSR and Knauf glass wool or polyester, either run batts or blanket.
  • Wall insulation: predominantly using AGI, CSR and Knauf glass wool or polyester, plus we have a range of specialist acoustic products for areas such as home theatres or noisy street fronts.
  • Underfloor insulation. Whether it’s between floors, a suspended floor on piers, or a concrete slab, AGI has a range of underfloor insulation products that deliver long term thermal and acoustic control.
  • Cavity wall insulation. Brick walls are strong, but they provide poor insulation against heat and cold. AGI’s range of cavity wall range provides cost effective and repeatable installed R-Value in these applications to assist builders and designers to achieve six (6) star energy ratings.
  • Roof Sarking is a pliable membrane that sits under your roof tiles, helping insulation work more efficiently, and protecting your home from storm driven rain and dust, condensation and bush fire ember attack.
  • Wall wrap products provide a secondary protective skin to your home which can reduce draughts and help make your home more comfortable. The AGI range includes foil wraps and vapour permeable wrap that allows the controlled escape of vapour reducing condensation and related problems such as mould, timber rot and corrosion.

Ceiling insulation

Ceiling insulation is designed to reduce heat transfer through the roof of your home, improving your home’s comfort and energy efficiency. By reducing the rate of heat transfer in home you will find your house substantially warmer in winter and cooler in summer, meaning you won’t have to rely on your heaters and air conditioning as much. AGI ceiling insulation can reduce your energy bills for heating and cooling by up to 45%.

Information on Bradford and Knauf Earthwool is below. For further information or advice on a particular application, contact your nearest AGI office.

Bradford Ceiling Insulation

Bradford-Gold-SmallBradford Gold insulation batts are available in R-Values from R2.5 to R4.1, and are made from glasswool, the world’s most popular insulation material. If your toes froze last winter and you found the summer heat unbearable then it may be time for you to consider how insulation can help you and your family. Bradford Gold ceiling insulation can reduce your energy bills for heating and cooling by up to 45%.


Features and Benefits 

  • Keeps homes warmer in winter and cooler in summer
  • Saves on energy costs
  • Reduces greenhouse gas emissions
  • Low allergen
  • Meets the highest Australian insulation standards
  • Environmentally sound – made from up to 65% recycled content
  • 70 year warranty
  • Non-combustible
R-Value (m2K/W)Product CodeDimensions (mm)Thickness (mm)Pieces per Packm2 per PackList $/Pack exc GST
R5.0 HP105417430x116024084.00$58.23
R6.0 HP77871430x116026063.00$58.88
R7.0 HP122546430x116029042.00$60.70

Knauf Earthwool Ceiling Insulation

Knauf-Earthwool-SmallThe Earthwool® Ceiling Insulation Batt range is a new generation of softer, safer and more environmentally friendly glasswool insulation for your home.

Advanced compression packaging reduces handling time and the risk of damage in transit and on-site. Batts are the traditional insulation product for ceilings, supplied in pre-cut rectangles at either 430mm or 580mm widths to suit the most common ceiling joist centres.

R-Value (m2K/W)Product CodeDimensions (mm)Thickness (mm)Pieces per Packm2 per PackList $/Pack exc GST

External Wall insulation

Walls are an open gate to the outside world letting heat and noise travel through them with ease. You can lose up to 25% of the heat in your home through the external walls in winter and around the same amount of heat can enter in through the walls during summer. Insulation essentially acts as a barrier to slow down this process and makes a substantial difference to the temperature you will feel inside, meaning you can live more comfortably and spend less on energy.

Information on Bradford and Knauf Earthwool is below. For further information or advice on a particular application, contact your nearest AGI office.

Bradford Wall Insulation

Bradford wall batts are available in R-Values from R1.5 – R2.5. Manufactured from glasswool, the batts are specially stiffened and treated to provide a moisture resistant insulation that meets the Building Code of Australia’s minimum requirements for energy efficiency in homes. The glasswool used is made up of very thin glass fibres that are spun like fairy floss to create millions of air pockets. These air pockets are very poor conductors of heat and resist the flow of air or radiation through the insulation.  Bradford insulation for walls can reduce energy used for heating and cooling by up to 20% leading to a decrease in your energy consumption and in your energy bills.

Features and Benefits 
  • Earthwool Batts are odourless, rot proof, non-hygroscopic, do not sustain vermin and will not encourage the growth of fungi, mould or bacteria.
  • Excellent acoustical properties reduce sound transmission in the home when properly installed in walls, ceiling and floor systems.
  • Low dust for easier handling and increased productivity.
  • Consistent quality materials feel good, cut easily and install fast.
  • Highly resilient insulation recovers quickly to full thickness once out of bag for a snug fit and superior finished aesthetics.
R-Value (m2K/W)Product CodeDimensions (mm)Thickness (mm)Pieces per Packm2 per PackList $/Pack exc GST
R2.0 HP19177430x116075126.00$61.25
R2.1 HP111716430x11607063.00$58.05
R2.7 HP122546430x11609052.50$49.03
R4.0 HP122546430x116014052.50$52.18

Knauf Earthwool Wall Insulation

The Earthwool® Ceiling Insulation Batt range is a new generation of softer, safer and more environmentally friendly glasswool insulation for your home.

Batts are available in thicknesses to suit 75mm, 90mm and 140mm timber and metal frames. Unlike reflective foil, Earthwool External Wall Batts prevent heat gain in summer and heat loss in winter by countering convection, conduction and radiation.

Earthwool External Wall Batts provide a cost-effective thermal and acoustic barrier for energy-efficient construction. The consistent quality, low dust, and clean-cutting resilient fibres make fabrication easy and installation fast. Earthwool Batts can be used in timber and metal frame applications in residential structures.

Knauf Insulation also offers High Density (HD) and Super High Density (SHD) External Wall Batts with increased density and lower thermal conductivity to maximise energy savings, and DriTherm®, a silicon impregnated insulation product designed specifically for double brick walls.

R-Value (m2K/W)Product CodeDimensions (mm)Thickness (mm)Pieces per Packm2 per PackList $/Pack exc GST
R2.0 HD244462430x116075209.98$71.16
R2.0 HD2438628450x1200752010.8$77.00
R2.5 HD2437532430x116090146.98$69.45
R2.7 HD256736430x116090104.99$73.55

Cavity wall insulation

Double brick houses have a reputation in Australia for being hot in summer and cold in winter. The thermal rating (R-Value) of a double brick wall (RO.50) is about the same as an uninsulated brick veneer (RO.46) and uninsulated weatherboard (0.46). A building of heavy material such brick responds slower than buildings of lighter material (ie timber) to fluctuations in outside temperatures. This is known as ‘thermal lag’. This slow thermal lag can make a brick house appear better insulated than some other materials, but when the house gets hot, it has a tendency to stay hot longer (or cold longer in winter).

All external walls require insulation, and brick is no exception.  AGI has a range of very efficient brick cavity insulating products. Insulation of cavity brick walls is always best done when the house is being built, but we do have a range of solutions for retro-insulating older homes.

Polyair High Performance Reflective Blanket

Polyair’s range of high performance reflective insulation blankets deliver high R-Values and an easy to install and cost effective insulation material for cavity walls.

Polyair Performa 4 and Performa 7 combine an inner core of fire retardant closed cell foam with two external layers of high performance reflective aluminium foils and a special external coating of gold coloured antiglare with reinforced netting.

Both external surfaces reflect radiant heat and the fire retardant inner core achieves thermal break (Performa 7: R0.2 and Performa 4: R0.1) and prevents heat flow transferring from one surface to the next.

Polyair’s high thermal performance against heat flow provides an excellent energy efficient solution that’s safe, easy to install and cost effective. Polyair excels in laboratory testing for all mandatory Australian Standards, National Construction Code and Building Code of Australia certification benchmarks.

Knauf DriTherm® Cavity Wall Insulation

DriTherm® Cavity Wall Insulation is rigid slabs of non-combustible, glass mineral wool with a water-repellent additive. DriTherm® features include:

  • Odourless, rot proof, non-hygroscopic, do not sustain vermin and will not encourage the growth of fungi, mould or bacteria.
  • Virtually no vapour resistance, allowing water vapour to pass freely through the slab and therefore allowing wall to breathe.
  • Easy to handle and install, being lightweight and easily cut to size.
  • Contains a water repellent silicone binder to ensure no water passes through to reach the inner leaf of masonry. Nor will it transmit moisture by capillary action across the cavity.
  • Free from CFCs, HCFCs and any other material with ozone depletion potential in its manufacture and content and represents no known threat to the environment.

Knauf Supafil Masonry Cavity Wall Insulation

Supafil® Masonry Cavity Wall Insulation is a silicone treated, non-combustible glasswool for injection in either existing masonry walls or the walls of new homes.  It is ideal to increase the energy efficiency in older homes for which it is impossible to install batts.  It will be available through AGI in early 2015.  In the United Kingdom, Blow-in has been installed in over 5 million existing homes to increase energy efficiency and bring the comfort levels up to modern standards.

Rockwool Cavity Wall Insulation

Cavity wall insulation can be installed in most double brick homes during or after construction to greatly increase energy efficiency and reduce space heating costs. The insulation material creates thermal mass within the walls to prevent heat transfer through convection, keeping households cooler in summer and warmer in winter.

Access to install cavity insulation into the external walls of an existing home is usually obtained by removing roof tiles. For houses with a metal roof, access can obtained by either lifting the roof sheets or injecting the insulation material through holes drilled in the external skin of brickwork.  As a cost-effective and environmentally sustainable product made from 100% recycled material, every double brick home owner should consider the benefits of cavity wall insulation.