What does "thermal bridging" refer to in building construction?

Thermal bridging refers to the transfer of heat through materials in a building's construction, where conductive materials create a path for heat to flow more easily than through insulated areas. This phenomenon often occurs at junctions in building elements, such as between walls and roofs, or around windows and doors, where there is less insulation or gaps in the insulating layer.

Understanding thermal bridging is critical because it can lead to energy inefficiencies, increased heating and cooling costs, and potential moisture problems. In well-designed buildings, strategies are implemented to reduce thermal bridging, such as improving insulation around structural elements, which enhance overall energy performance. An accurate grasp of thermal bridging allows home inspectors to assess energy efficiency and comfort in residential environments.