What rating indicates the effectiveness of insulation?

The effectiveness of insulation is indicated by its R-value. R-value measures the insulation's resistance to heat flow; therefore, the higher the R-value, the greater the insulating effectiveness. This rating is crucial for determining how well a material can conserve energy by slowing down the transfer of heat between the inside and outside of a building.

In practical terms, this means that materials with a high R-value are more efficient at keeping spaces warm in winter and cool in summer, contributing to energy savings and comfort within the building. R-value is a standard metric used across the construction and real estate industries, making it an essential factor to consider when evaluating insulation materials.