What does a high R-Value in roofing insulation indicate?

A high R-Value in roofing insulation signifies higher thermal resistance, which translates to better insulating effectiveness. The R-Value measures an insulation material's ability to resist heat flow; thus, the greater the R-Value, the more effective the material is at minimizing heat transfer. In colder climates, a high R-Value helps keep heat indoors, while in warmer climates, it reduces heat entering a building. This quality makes high R-Value insulation particularly valuable for energy efficiency, potentially lowering heating and cooling costs.

It’s important to understand that while insulation's weight, cost, and environmental impact can vary significantly based on material and design, these factors do not inherently correlate to the R-Value. Therefore, the presence of a high R-Value specifically highlights superior thermal resistance rather than associated characteristics like weight, cost, or environmental consequences.