Any Field Test or Hygrothermal Modeling Results to Support the IRC 2021 Class I Variable Vapor Retarder Requirement?

As Martin said in his GBA article “Building Codes Update Vapor Retarder Requirements”, the code has gotten a lot more complicated.  Hope I don’t screw this question up! For years we… As Martin said in his GBA article “Building Codes Update Vapor Retarder Requirements”, the code has gotten a lot more complicated.  Hope I don’t screw this question up! For years we…Read MoreGreenBuildingAdvisor