What does the R factor measure in a building?

The R factor measures the degree of resistance to heat transfer in a building. It is a crucial component in assessing the thermal insulation properties of building materials. A higher R-value indicates better insulating effectiveness, meaning the material is more efficient at resisting heat flow. This aspect is essential for energy efficiency, comfort, and climate control within a structure. Good insulation helps to keep the interior temperature stable, minimizing the need for heating or cooling, and contributing to lower energy costs.

In the context of real estate, understanding the R factor is important for buyers and sellers alike, as it can significantly impact a building's overall energy performance and livability. This metric is particularly relevant in energy codes and certifications that aim to enhance building sustainability.