In the context of insulation, what does 'R-value' measure?

R-value measures the thermal resistance of insulation materials, which indicates their effectiveness in resisting heat flow. A higher R-value means better insulation performance, as it can significantly reduce the transfer of heat in and out of a building. This is critical in maintaining energy efficiency and comfort levels within indoor spaces, especially in climates with varying temperatures.

When insulation has a high R-value, it helps keep buildings warmer in the winter and cooler in the summer, ultimately leading to lower energy costs for heating and cooling. Understanding R-value is essential for selecting the right insulation for specific applications, ensuring compliance with building codes, and achieving energy efficiency goals.