Maximum solar radiation is interrupted by the roof (horizontal surface) followed by the east and west walls and then the north wall during the summer period, when the south oriented wall receives minimum radiation. It is desirable that the building is oriented with the longest walls facing north and south, so that only short walls face east and west. Thus only the smallest wall areas are exposed to intense morning and evening sun.

3.3. Building Materials

The materials used are stone and mud bricks that reduce carbon emission through savings on resources and embodied energies. The slab is of filler slabs, incorporating clay tiles, to save the amount of steel and cement used. External walls are built using soil-stabilized mud and laterite blocks and finishing treated with fine waterproof coating. This ensures that surfaces are non-adorable, need no external paint applications and are thermally efficient. Rubber wood, a non-forest timber, is used for door shutters and as flooring. The internal doors are of compressed coir door panels for the door shutters. These are local resources that use less energy to produce, reducing carbon emissions.