The 135mm Isotherm Insulation is NOT SANS compliant for the Western Cape region as the R-value is below the specified R-value 3.70. If used as a top up the 135mm Isotherm Price supplied by us is the best in SA.
In fact the Installed R-value of the 135mm Isotherm 3.55 this does not exceed the required Insulation value as required by the new SANS legislation.
As we know this Roof Insulation Product is also eco-friendly as the insulation is manufactured from recycled plastic bottles. (PET Plastic bottles)