Many building materials are used for construction and different methods are followed. Each of these building materials has a unique embodied energy. Out of these materials, Roofing material constitute one of the major energy consuming components of the building. Effective utilization of available energy and its conservation is global challenge. For a developing country like India, the increasing demand of energy has created a scope for the study embodied energy of alternative roofing technique and their advantages for the sustainable building construction. The total embodied energy of a building can be reduced significantly by using alternate roofing technique such as RCC Filler slab which has lower embodied energy value.
Filler slab technology is a simple and a very innovative technology for a slab construction. The filler slab is based on the principle that for roofs which are simply supported, the upper part of the slab is subjected to compressive forces and the lower part of the slab experience tensile forces. Concrete is very good in withstanding compressive forces and steel bears the load due to tensile forces. Thus the lower tensile region of the slab does not need any concrete except for holding the steel reinforcements together. Hence concrete in the bottom region of solid RCC slab is replaced by an energy efficient and cost effective material. With reduced consumption of building material for roofing, the cost of the building can be reduced predominantly.