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FAQs

Why is ThermaSilver® a better insulation product?

ThermaSilver® panels contain minute particles of graphite that act as infrared reflectors and absorbers that considerably reduce thermal conductivity. ThermaSilver® enables more streamlined structures to be built while providing a better insulating effect.

What sort of insulation performance can you expect?

Up to 20% more insulation performance with the same board thickness. Or conversely, achieves the same energy rating as normal EPS using a thinner board or a lower density.

Who manufactures ThermaSilver®?

RMAX manufactures ThermaSilver®. RMAX are Australia’s leading manufacturer of EPS for the building industry – your guarantee of quality.

Does ThermaSilver® have better thermal conductivity?

ThermaSilver® improves insulation when compared to other materials. ThermaSilver® with a build density of 15kg/m3, achieves a lower thermal conductivity of 0.32W/(m.K), which translates into a higher R value. In normal EPS with the same bulk density, the thermal conductivity is 0.037W(m.K).

What is the fire rating of ThermaSilver®?

ThermaSilver® comprises an EPS core that is made of fire retarded expanded polystyrene. It self-extinguishes when the source of the flame is removed.

Does age affect the thermal performance of ThermaSilver®?

No. ThermaSilver® consists or 97%-99% air and 1%-3% material. Because of its cellular structure ThermaSilver® is dimensionally stable, and will not settle over time. ThermaSilver® used and installed correctly does not deteriorate with age and as such is able to deliver constant R values for the life of the building.

Is ThermaSilver® strong?

Yes. ThermaSilver® can be manufactured in a number of densities and each density exhibits excellent compressive and flexural strength and dimensional stability characteristics, at a very high strength to weight ratio.

The range of classes available enables specifiers to select the most appropriate balance between structural and insulation properties for any building application.

How effective is ThermaSilver® as an acoustic Insulation material?

Because EPS has a predominantly closed cell structure, it offers only a limited absorption of airborne sounds.

Is ThermaSilver® resistant to chemicals?

It depends. It is resistant to virtually all aqueous media including dilute acids and alkalis and to methanol, ethanol and silicone oils. See the table of chemical resistance in the brochure.

It has limited resistance to paraffin oil, vegetable oils, diesel fuel and Vaseline, which may attack the surface of ThermaSilver® after long-term contact.

It is not resistant to hydrocarbons, ketones, esters, paints containing thinners, and solutions of synthetic adhesives.

In roof construction requiring hot asphalt, care should be taken to follow recommended installation instructions for hot bituminous asphalt to prevent melting or collapse of ThermaSilver® insulation boards.

Is ThermaSilver® degraded by ultraviolet light?

Prolonged exposure to sunlight will cause a slight discolouration (yellowing) of EPS insulation and cause some surface embrittlement.

Even so, the thermal insulation properties will not be affected unless exposure results in loss of thickness of the ThermaSilver® boards, although the friable surface can make bonding difficult.

ThermaSilver® insulation should be covered with an opaque covering to protect it from UV light if it is to be stored in the open. Clear or transparent packaging is not to be used to store ThermaSilver®.

Is ThermaSilver® durable?

Yes. Because ThermaSilver® is an inert, organic material, it will not rot and is highly resistant to mildew. It also provides no nutritional value to ants, termites and rodents.

Provided ThermaSilver® does not suffer mechanical damage or failure of any fittings that may be used, it should have a life equal to that of the building in which it is installed.

Does ThermaSilver® contain CFCs?

No. ThermaSilver® is chlorofluorocarbon (CFC) and hydro chlorofluorocarbon (HCFC) free.

At no stage during the manufacture or application of ThermaSilver® is the use of CFCs or HCFCs, or other compounds which are said to contribute to the destruction of the earth's ozone layer, required.

Does ThermaSilver® burn?

Because ThermaSilver® contains a fire retardant additive, they do not present an undue fire hazard when correctly installed. Like timber, particleboard and other organic building materials, ThermaSilver® will burn when in prolonged contact with a flame. Due to the presence of the fire retardant additive in ThermaSilver®, this flame will self extinguish almost immediately after the fire source is removed. The flame retardant additive helps inhibit accidental ignition from small fire sources.

Does ThermaSilver® give off toxic fumes?

The level of toxicity of ThermaSilver® in a fire situation is no greater than that of timber and other commonly used building materials; the same toxic gas, carbon monoxide is produced. Also produced are carbon dioxide and soot (carbon). There is no emission of such gases as hydrogen cyanide or hydrogen chloride.

Where can ThermaSilver® be used in building construction?

In almost any application where insulation or a combination of insulation and strength is required.

As an insulation material, it is used in a number of roof, wall, ceiling, and sub floor systems…often in combination with other materials such as steel (in sandwich panels commonly used for cold store construction), concrete (as an insulation core in tilt up wall panels) and gypsum and plasterboard (as skins for ceiling panels and other prefabricated components).

Is ThermaSilver® subject to Australian Standards?

Yes. RMAX manufacture ThermaSilver® to ensure its physical characteristics meet the standards specified in AS 1366 Part 3 - 1992. Where the densities exceed the AS1366 Part 3 - 1992 grade levels RMAX has measured the properties and provides specification sheets for these high density grades.

Is ThermaSilver® cost effective compared to alternative insulation?

Because of the high level of versatility of ThermaSilver® and the wide range of applications for which it is suitable, its cost effectiveness compared to alternative materials can generally be accurately assessed only on a case by case basis.