What does R-value measure?

R-value measures thermal resistance, which quantifies how effectively a building material can resist heat flow. This value is crucial in the context of insulation, as a higher R-value indicates better insulating properties, meaning the material will help maintain the desired temperature within a space by reducing the transfer of heat. This is especially important in energy efficiency, as buildings with adequate insulation can significantly reduce heating and cooling costs.

Understanding R-value is essential for anyone involved in construction or renovation, as it helps determine the energy efficiency of walls, roofs, and floors. Knowing how materials behave thermally allows builders and electricians to make informed decisions about insulation, leading to more comfortable indoor environments and reduced energy consumption.