What does thermal bridging mean?
A thermal bridge, also called a cold bridge or heat bridge, is an area or component of an object which has higher thermal conductivity than the surrounding materials, creating a path of least resistance for heat transfer. Thermal bridges result in an overall reduction in thermal resistance of the object.
Thermal insulation is the reduction of heat transfer (i.e. the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. The insulating capability of a material is measured as the inverse of thermal conductivity (k).
- A thermal insulator is something that prevents heat from moving from one place to another. There are 3 main ways that heat can travel: convection, conduction, and radiation. Typically the phrase 'thermal insulator' refers to a material that blocks conduction.
- As a metal, aluminum foil is also a good conductor of electricity and heat. So why do we wrap food in aluminum foil to keep it warm if aluminum conducts heat so well. Another basic property of all metals is that they are all highly reflective. There are two properties that can make metal foil useful as insulation.
- Any material that keeps energy such as electricity, heat, or cold from easily transferring through is an insulator. Wood, plastic, rubber, and glass are good insulators.
A thermal break or thermal barrier is an element of low thermal conductivity placed in an assembly to reduce or prevent the flow of thermal energy between conductive materials.
Updated: 2nd October 2019