What does the R-Value measure in construction?

The R-Value specifically measures the insulating characteristic of insulation in construction materials. This value represents the material's resistance to heat flow; the higher the R-Value, the better the material insulates against heat transfer. This is crucial for energy efficiency in buildings, as effective insulation helps maintain desired indoor temperatures, reducing the need for heating and cooling systems and ultimately leading to energy cost savings.

Understanding R-Value is essential for evaluating insulation options, particularly in climates where temperature control is critical. Thus, when considering insulation materials, selecting those with a higher R-Value indicates better performance in preventing heat loss or gain.