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 Glasswool batts:
Glasswool batts are typically made from 65% recycled glass that is then melted down and spun into a matt of fibres. We also produce a range of different R~Values to suit all climates and requirements.
Glasswool batts are easily cut and move around, making installing insulation in your home a simple D.I.Y. project. You must ensure that the batts are fitted tightly into the joists ~ any gaps around and between the edges of the batts will greatly reduce the effectiveness of the insulation.
Glasswool fibres are not harmful to your health, but some people may experience a slight skin irritation during the installation. If this is a problem, we recomend that you wear sensible clothing, such as a dust mask, gloves and long sleeve shirt, during the installation process. We also do insulation installs here at David's Insulation.
Polyester batts:
Polyester batts are made from polyester fibres that are layered into a mat. They look similar to glasswool batts, but are softer to the touch and don't have the 'itch factor'.
The thermal performance of polyester batts is typically not as effective as glasswool ~ due to the nature of thin fibres. Therefore, to achieve the same performance (R~Value) you will typically need a thicker polyester batt than glasswool. This, and the nature of raw materials, makes polyester batts more expensive for a given R~Value than glasswool.
Rockwool:
Rockwool is made from melted volcanic rock (Basalt) that is then spun into fibres. Rockwool is typically a denser material than glasswool, and posesses excellent thermal and acoustic insulating properties. The same installation precautions are to be used as installing glasswool when handling rockwool.
Wool blend batts:
Wool blend batts are typically a mixture of 60% sheep's wool and 40% polyester fibres, layered into a mat. Wool is a natural product with great insulation properties, however the density of wool insulation is often quite low. This means a greater thickness of insulation is required to achieve the same R~Value as other more dense products.
*Note* For fire safety and to prevent insect infestation, it is important to choose a wool blend that is made from fully scoured wool and that has been treated with a vermin and rot proofing agent.
Reflective foil laminates:
Traditional double~sided reflective foil laminates are made from aluminium foils that are then laminated to paper and reinforced with a glass fibre scrim. Recent developments have been the replacement paper, with a woven polymer fabric, in products such as foil wraps and heavy duty sarking (under roofing iron / tiles).
Both types of product provide thermal insulation properties when installed adjacent to an airspace of at least 20mm. Reflective foil laminates also provide a layer protection against water, dust and other airborne matter, both during construction (wall wraps) and after the home is completed (sarking)
Reflective foil laminates are graded in terms of their strength as per (Australian Standards) AS4200 ~ Light Duty, Medium Duty, Heavy Duty and Extra Heavy Duty. To be used in Australian homes, they must also have a Flamability Index less than / equal to 5 when tested to AS1530.2.
Some types of double sided reflective foils have an anti~glare coating on one side to make installation safer under sunny conditions. It is also important to ensure that any holes, joins and edges are taped up, as this will effect the foils insulation performance.
Reflective foil / blanket:
This is a product that has glasswool banket bonded to reflective foil laminate. This product is used under metal deck roofs for insulation, as well as condensation control and to reduce rain and hail noise. The insulation performance of the blanket will be highest if the foil faces a still air gap.
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