Now a days the builders are highly concentrating in building any project in an eco-friendly way. The cost may be a bit high when compared to others but the recycling project of everything is good. Many contractors and architects have turned their interest in designing the eco-friendly buildings. They make use of solar energy as a part of their construction. This ensures protecting the building from heat in summer and winter months. The protection comes from the tree shades or by applying some reflective treatment on the surface which automatically increases the life of the project. The architects are even trying to incorporate passive solar radiation collecting system which with reduce the maintenance cost of the buildings.