As we seek to reduce and eliminate thermal bridges in our buildings, things like door hardware show up as thermal bridge challenges. Usually, door hardware consists of assemblies of thermally conductive metal that “bridge” the door, conducting heat from the interior through the door (insulated or uninsulated) to the exterior. Thermally conductive hardware may seem insignificant in a leaky building, but it can become more significant as the building is made tighter and more thermally efficient.