CLIMATE ZONES - SOUTH AFRICA

Insulation Products - South Africa
PO Box 38653, Booysens, Johannesburg, South Africa, 2016
95 Second Street , Booysens Reserve , Johannesburg
Tel 27-11-835 2127
Fax : 27-11-496 1263
E-mail : mail@insulpro.co.za

The Thermal Insulation Association of South Africa have put together a comprehensive guide for thermal

insulation in South Africa and can be accessed by clicking on the above link

Extracts of this guide more specific to Aerolite and Aeropink ceiling insulation can be derived from this guide and assist with your decisions with regards to meeting the requirements in your home in terms of SANS 204 below :-

STEP 1 Determine which Climatic Zone Your home falls in and click on that zone

Energy Efficiency Compliance with SANS 204-1 Energy Efficiency in Buildings
Compliance with the requirements of this standard shall be:
a) through a rational design prepared by a competent person and
b) in compliance with SANS 204-2 and SANS 204-3 (i.e. deemed-to satisfy).

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. Energy intervention measures will vary from region to region.

Click on your region to see the Recommended Levels of Insulation in your area.

Zone Description Major centre
1	Cold interior	Johannesburg, Bloemfontein
2	Temperate interior	Pretoria, Polokwane
3	Hot interior	Makhado, Nelspruit
4	Temperate coastal	Cape Town, Port Elizabeth
5	Sub-tropical coastal	East London, Durban, Richards Bay
6	Arid interior	Upington, Kimberley

Fire
All South African thermal insulation products are to comply with National Standards and have to be tested in accordance with SANS 428:2007 “Fire performance classification of thermal insulated building envelope systems”, prior to being sold.

This Standard incorporates all factors required for fire-hazard or fire-risk assessment of the materials, or assemblies under actual fire conditions.

Where any insulation, insulating panel or lining used as thermal insulation system under an external covering as part of a roof or wall assembly (thermal insulated building envelope), tested in accordance with SANS 10177-5 and found to be combustible, shall be acceptable if it complies with the requirements of SANS 428 when tested in accordance with SANS 10177-10 for classification and such classification have been confirmed in accordance with SANS 10177-11 with regard to use and application.

NOTE The requirements contained in SANS 428 are intended to evaluate the fire safety performance of thermal insulated building envelopes. The test protocol makes provision for both horizontal and vertical applications and with or without the use of a fixed water extinguishment (sprinkler) system.

Thermal Resistance = R-Value
All insulation materials are rated for their performance in restricting heat transfer. This is expressed as the R value, also known as thermal resistance. The R value is a guide to its performance as an insulator—the higher the R value, the better insulation (i.e., resistance to heat flow) it provides.

R values are expressed using the metric units m²/K/W, where:
• m² refers to one metre squared of the material of a specified thickness;
• K refers to a one degree temperature difference (Kelvin or Celsius) across the material;
• W refers to the amount of heat flow across the material in watts.

Use the nominal R-values as listed by the manufacturer on the packaging of the insulation to determine the performance.

Products which have the same R value will provide exactly the same insulating effect as each other, provided they are correctly installed.