When a contractor talks about the R-value of a material, they are talking about the material’s ability to resist thermal movement through it. The higher the R-value, the more insulation the material provides by limiting airflow between outside and inside the building.
It’s important to think about R-value when considering your roof project because by increasing the R-value, you allow your roof to keep warm air in during the winter and out during summer. The increase in thermal resistance can result in using less energy to maintain your building temperature.
