International Science and Technology Journal

The problem of global warming is likely to make the buildings increasingly inefficient, and uninhabitable, not only in the present time, but also in the future, as a significant part of global energy is consumed by buildings for cooling and heating purposes. Unfortunately, most of the buildings that will be exist in the coming decades are already built without taking into account their energy consumption in addition to their impact on the inhabitant and the environment. Green Nanotechnology offers potential to improve existing building performance and influence their development toward sustainability to prevent future environmental problems and provide better indoor quality. Nano technologies, materials, products, and applications are anticipated to contribute impressively to environmental protection by saving crude materials, energy as well as by decreasing greenhouse gases. This paper intends to address the possibilities and applications offered by nanotechnology for existing building to make them more environmentally friendly. In order to achieve the study aim the researcher will consult relevant literatures in the field. Nanotechnology applications are not only extremely useful in new constructions but also more beneficial in existing buildings which will directly or indirectly contribute to its sustainability without invasive intervention and consequent damage to the building itself.