This report presents the results of our performance evaluation of the presence of a VaprThrm® vapor barrier in an insulated structure.
The objective of the performance evaluation was to observe the impact of a VaprThrm membrane on the insulating value of a sample garment.
The test demonstrated that the presence of the polyurethane barrier membrane reduced heat transfer through the test sample by approximately 46%. This is a substantial reduction in heat loss for a garment addition that adds minimal weight.
The test results are described below.