What does the term 'thermal bridging' refer to in roofing?

The term 'thermal bridging' refers to the transfer of heat through a conductive material. This phenomenon occurs when there is a physical pathway that allows heat to flow more easily compared to the surrounding insulating materials. In roofing, thermal bridges often arise from structural elements such as beams or metal fasteners that penetrate insulation layers, creating areas of increased heat loss or gain. This can lead to inefficiencies in the thermal performance of the building, and can cause issues such as condensation or ice dam formation on roofs.

Understanding thermal bridging is crucial for roofing professionals, as it highlights the importance of proper insulation detailing and the use of materials with lower thermal conductivity to minimize energy loss and enhance overall building performance. Recognizing these heat transfer pathways helps in designing roofs that effectively manage temperature variations and improve energy efficiency.