FGIA Releases New Guidelines for Testing of Moisture Vapor Transmission Rates
The Fenestration and Glazing Industry Alliance (FGIA) has released a new technical bulletin (IGMA TB-2701-23) providing a standardized testing method and sample configurations and units for reporting the transmission rate of moisture vapor pertaining to insulated glass units (IGUs).
Based on updated ASTM test methods available and their relevance to IGU testing, it was decided to adopt ASTM F1249 as the standard test method for evaluating sealant Moisture Vapor Transmission Rates (MVTR).