what is r value in insulation

The R-value in insulation is a measure of how well a two-dimensional barrier, such as a layer of insulation, resists the conductive flow of heat. A higher R-value indicates a greater resistance to heat flow and better insulation performance, leading to improved energy efficiency. The R-value is a crucial factor in determining the effectiveness of insulation materials. It is important to note that R-value is a measure of thermal resistance and is the inverse of U-value, which measures thermal conductance. Insulation R-values vary based on the type, thickness, and density of the insulation material, and a higher R-value usually means a higher price point. It is essential to consider the recommended R-values for different climate zones when selecting insulation for a building.