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Imagine recycled PET bottles transformed into a roof insulation and wall insulation. This is the truth of ISOTHERM Thermal Insulation; guaranteeing you and your family warmth in winter and coolness in summer.

ISOTHERM Thermal Insulation is made from 100% thermally-bonded, people-friendly polyester. The polyester fibre is produced from recycled PET bottles. The soft texture of ISOTHERM insulation makes it easy to roll out and cut to size. Pleasant to touch, ISOTHERM is simple and safe to install. No loose fibres or itching. It is non-allergenic, non-irritant and resilient.

ISOTHERM, being made from polyester, will not absorb water or other moisture. The product will dry naturally should it be exposed to small amounts of water.

ISOTHERM has been fire tested to classification B/B1/2 and is safe for use in both residential and commercial applications. It will not contribute to the spread of flame and the product will self–extinguish when the heat source is removed. However, it is still considered good practice to not expose it to naked flames or other ignition sources. ISOTHERM is resilient and does not shed loose fibres; it withstands normal handling during transportations and installation.


No chemical additives, no odour or emissions of volatile organic compounds.

Polyester ISOTHERM:

Is non- allergenic.

Maintenance Free:

ISOTHERM is resistant to condensation and associated fungi and bacteria. ISOTHERM retains loft and does not degrade over time.

Eco – Friendly

ISOTHERM is made using polymer from recycled PET bottles and is completely recyclable.

Energy Saving

ISOTHERM saves energy. In less than 3 years ISOTHERM can pay for itself by savings on electricity usage.

Fire performance 

ISOTHERM complies with SANS 10400, the application of the national building regulations, as an insulation material.
Tested in accordance with SANS 428: fire performance classification B/B 1/2. ASTM – E 84: spread of flame: nil. BS 5803 part 4: does not smoulder.

Control Temperature

ISOTHERM Thermal Insulation maintains a comfortable indoor climate all year round; keeping interiors warm in winter and cool in summer.

R-Value – The measure of an insulation product’s ability to restrict heat transfer. The R-Value is therefore indicative of an insulation product’s thermal insulation performance. The higher the R-Value the better the performance and effectiveness of the insulation product. The R-Value of ISOTHERM is dependent on the thickness selected. The thicker the product the better the performance.

Up R-Values – This is the resistance to the upward flow of heat; sometimes referred to as “winter” R-Values or warming.

Down R-Values – This is the resistance to the downward flow of heat; sometimes referred to as “summer” R-Values or cooling.

Total R-Values – This is the total thermal resistance provided by a roof or ceiling assembly and /or wall, including the insulation material.

Total R-Values are the best indicators of performance.