The Isotherm specifications page is to help the home owner make a more informed decision as to the insulation that must be installed. In fact, insulation has been made compulsory in all new homes and buildings as of January 2013. This legislation has been put in place because of the energy crisis that we have in South Africa.

Isotherm Specifications

Maintenance-free – In fact ISOTHERM is resistant to condensation and associated fungi and bacteria. It retains loft and will not collapse over time.

Eco-friendly – In fact ISOTHERM is made from 100% thermally bonded people-friendly polyester. The polyester fiber is produced from recycled PET bottles. ISOTHERM is also recyclable.

Accredited – ISOTHERM has recognised standards of quality such as the South African Bureau of Standards (SABS) and proof of qualitative associations with associations such as TIASA. ISOTHERM is also Agrément certified, an international standard of the highest quality and has earned ISO 9001 accreditation.

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.

Test reports available on request.

For further information contact Brits Nonwoven.

ASTM – E84:

spread of flame = 0

smoke index = 160

smoke toxicity = < 1 (low toxicity)

isotherm specifications

*SANS 10400 – 1990 The application of the national building regulations. Install the correct Isotherm Insulation for your roof.Be SANS compliant and save money on energy. Cool in Summer and Warm in Winter. Take your time and make an informed decision about the ceiling insulation for your home.


In Fact, the R-value of Insulation is the most important of the Isotherm Specifications. All insulation products are regulated by the new SANS legislation and the R-value of any Roof Insulation product is absolutely important.

The higher the R-value the better the performance of the Ceiling Insulation. In South Africa, the highest R-value is specified at 3.70