This project is the exploration of the concept of thermal bridging. This concept explores ideas of thermodynamics but specifically heat transfer. This project is based on the heat loss of a building because of a thermal bridge running through the building envelope. A thermal bridge is made of materials that will easily transfer heat, most commonly these are metal, concrete and glass. Our demonstration explores heat transfer through steel rebar which has a very high heat transfer coefficient. The demonstration consists of one wall section which is compromised thermally by rebar and a second which is properly insulated. The two wall sections have on one side an aluminum container of boiling water(100 C) and on the other a container of water at room temperature (25 C). The rebar wall section will allow heat to transfer and its SATP water will remain at a higher temperature than that of the properly insulated wall section.