Review on Eco-friendly insulation material used for indoor comfort in building

Since the 1930s, thermal comfort has been discussed. This idea is crucial in the construction industry because a building's structure, lighting, and energy-generating machinery must all be designed to give its occupants the most comfortable interior environment possible. Older buildings are currently developed as thermally efficient as feasible, and today all new structures should ensure a sufficient level of thermal comfort with the least amount of energy usage. One of the key features of this design is its potential for thermal insulation. On the other hand, the fundamental ideas of the sustainable development concept and the requirement to put into practice the defining principles of the circular economy force us to find fresh approaches to the creation of sustainable thermal insulation materials. In this context, natural materials, including vegetal fibers or products made from recycled industrial and agricultural waste, exhibit particularly attractive features for enhancing thermal comfort. This study initially examines the origins and progression of thermal comfort concepts and examines how integrating bio-based materials may affect the building envelope's ability to maintain thermal comfort. The current study first discusses the idea of thermal comfort before examining some recent building insulation solutions made of unusual materials, particularly Eco-Friendly insulation materials. The findings indicate that the new type of insulation materials can compete with the conventional insulation materials and offer good thermal conductivity value. An assessment of the state of the art of waste or biomass materials utilized in building construction to increase thermal comfort is carried out.