How do aluminum sheets affect the insulation of a building?

Aluminum sheets, due to their high thermal conductivity, can actually reduce the insulation of a building if not properly used. They can conduct heat quickly, which means that they may transfer heat from the outside to the inside or vice versa, depending on the temperature difference. This can lead to increased energy consumption for heating or cooling. However, when used as a reflective barrier in combination with proper insulation materials, aluminum sheets can help reflect heat and improve insulation by reducing heat transfer. It's crucial to use aluminum sheets correctly and in conjunction with other insulating materials to achieve optimal thermal performance in buildings.