Air Space R-Value
The presence of an airspace enclosed within a building envelope assembly is known to contribute to the overall thermal performance of the assembly. But, the actual R-value of an airspace can vary significantly depending on various conditions of use, such as the air-tightness of the assembly of materials enclosing an airspace.
To download the full presentation, choose a link below.
For additional information, check out the related research report: No.: 1601-02