1978. Principles of thermal insulation with respect to lightweight concrete (PDF)

The background to this publication is the need to help engineers and architects engaged in design become aware of current heating costs and to indicate economical solutions using lightweight concrete, which combines high thermal insulation with structural strength. In addition, this publication will assist authorities in drafting standards and regulations concerned with thermal insulation.

In cold countries, where external temperatures are significantly lower than those acceptable indoors, heating is required. The building envelope must therefore have high thermal insulation properties to reduce energy consumption for heating, as well as sufficient thermal capacity to stabilise indoor temperatures.

In hot countries, where the daily average temperature may be acceptable but the difference between day and night temperatures is considerable, the building envelope must also provide adequate thermal insulation and thermal capacity in order to limit heat gain during the day and retain warmth at night.

In many countries today, urgent research and analysis are being carried out to determine appropriate standards for thermal insulation. Because of the wide variation in national standards, materials, and construction types, this publication introduces the main principles of thermal insulation with respect to lightweight concrete. In addition, it provides guidance on defining thermal insulation requirements and how these may be met through the use of lightweight concrete.