What is "thermal insulation" used for in building codes?

Thermal insulation plays a crucial role in building codes primarily because it is designed to reduce heat transfer between the interior of a building and the outside environment. This reduction in heat transfer contributes significantly to energy efficiency, as it helps to maintain the desired indoor temperature, reducing the demand for heating and cooling systems. By minimizing the loss of heated air in the winter and the intrusion of heat in the summer, thermal insulation directly impacts energy consumption and costs for building occupants.

In addition to energy efficiency, effective thermal insulation can enhance occupant comfort, reduce environmental impact by lowering energy use, and often assist in meeting regulatory requirements for energy performance in buildings. This aspect of thermal insulation aligns with many building codes that prioritize sustainability and energy efficiency in construction practices.