aerolite sans compliant aerolite Insulation rolls


SANS legislation and Energy Efficiency in New Buildings in South Africa as of January 2013. This legislation is put in place to help South African homes to reduce energy loss.

In simple terms we have 6 zones in South Africa and the new legislation has zoned all areas as with a minimum required R value for insulation.

  • Zone 1 : 135mm Aerolite        145 mm Isotherm 
  • Zone 2 : 135mm Aerolite      145 mm Isotherm
  • Zone 3 : 100mm Aerolite      110mm Isotherm 
  • Zone 4 : 135mm Aerolite    145mm Isotherm 
  • Zone 5 : 100mm Aerolite      110mm Isotherm 
  • Zone 6 : 135mm Aerolite     145mm Isotherm 

South Africa has been divided into six climatic zones according to their humidity and temperature variations:

Each climatic zone has different R-value requirements for certain walls and ceilings. The appropriate thickness and R-value of insulation for your climatic zone, correctly installed, will protect your home against the cold, heat and save electricity providing a comfortable, healthy, safe and quiet space for you and your family.

Roof and Ceiling SANS 10400-XA


Building envelope requirements SANS 10400-XA “Deemed to satisfy”

  • Conceptually based on two principles:
    • Maximum energy demand per unit area(kVA/m2)
    • Maximum annual energy consumption per unit area (kWh/m2.a)
  • Dependent on building classification and climatic region
  • Design assumptions are given as well.

Maximum Energy Demand

Maximum Energy Demand

Maximum Annual Consumption

Maximum Energy Demand

  • A minimum of 50% of the annual average heating requirement for hot water must be provided by means other than electric resistance heating (Geyser) or fossil fuels
    • See options below but not only limited to these:
      • Solar heating
      • Heat pumps
      • Geothermal heat
      • Renewable combustible fuel
      • Heat recovery from alternative systems and processes
  • The functional requirements of sub-regulation XA2 shall be satisfied when:
    • 4.1.1 The population for which such building is designed is determined in accordance with Regulation A21;
    • 4.1.2 The hot water demand is determined in accordance with table 2 and table 5 of SANS 10252-1:2004;
    • 4.1.3 The storage requirement is based on maintenance of a hot water temperature of 60 0C;
    • 4.1.4 Solar water heating systems shall comply with SANS 1307, 10106 and 10254 based on the thermal performance determined in accordance with the requirements of SANS 6211-1 and SANS 6211-2.
    • 4.1.5 All exposed hot water service pipes (SANS 10252-1) shall be clad with insulation with a minimum R-value in accordance with SANS 204.
    • 4.1.6 Thermal insulation, if any, shall be installed in accordance with the manufacturer’s instructions.

All exposed hot water pipes with a 80 mm diameter

  • Must be insulated with a minimum R-value of 1.00

All exposed hot water pipes with a diameter greater than 80 mm diameter

  • Must be insulated with a minimum R-value of 1.5

Roof Insulation is now compulsory on all new homes as of January 2013.

Aerolite Insulation as well as Isotherm Insulation are both Sans compliant insulation materials when the correct thickness for your specific area.