Which material is commonly used for thermal barriers in construction?

Wood is commonly used for thermal barriers in construction due to its natural insulating properties. Its structure allows it to trap air, which is a poor conductor of heat, providing effective insulation against temperature fluctuations. This characteristic makes wood an excellent choice for maintaining energy efficiency in buildings, as it helps to regulate indoor temperatures by reducing heat transfer.

In addition to its insulation capabilities, wood is also lightweight and easy to work with, making it a favored material in residential construction for elements like framed walls. Its renewable nature and aesthetic appeal further enhance its suitability for use as a thermal barrier.

While other materials like steel, glass, and concrete have their own uses in construction, they tend to conduct heat more efficiently, which can be a disadvantage when used primarily as thermal barriers. Therefore, wood stands out as the most effective option among the choices provided.