Climate Zones

The SANS 204 legislation deems certain thicknesses of insulation safe for each climate zone.

SANS 204 Recommended Aerolite Ceiling Insulation Thicknesses For Your Climate Zone:
Minimum required Total R-value (m².K/W) (for roof solar absorptance of more than 0.55)
Zone 1 = 135mm – use 135mm Aerolite
Zone 2 = 130mm – use 135mm Aerolite
Zone 3 = 100mm – use 100mm Aerolite
Zone 4 = 135mm – use 135mm Aerolite
Zone 5 = 100mm – use 100mm Aerolite
Zone 6 = 130mm – use 135mm Aerolite

The above deemed to satisfy thicknesses are based on the “R” values for the relevant zones.

Aeropink installs 135mm or 100mm Aerolite to meet the recommended R-value

In case of any change requiring plan approval, a rational assessment shall be carried out. The Deemed-to-Satisfy Provisions are based on six climatic zones.

South Africa has become very aware of the importance of healthy homes and conservation of energy as part of the move to sustainable building. Insulation correctly installed plays a large part in ensuring efficient use of energy and a healthy internal environment in South African buildings.

A typical un-insulated home loses and gains up to 35% of it’s energy through the ceiling, and this can be dramatically reduced by installing the correct thickness insulation.


An important consideration when building is to determine the relevant climatic zone. Each of the climatic zones has a different R-Value which is the ability of a product to resist the transfer of heat. Thermal insulation provides a high resistance to the flow of heat from the warm surface to the cold surface in your home, helping you maintain a comfortable living environment, keeping your house cool in summer and warm in winter.

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