A study for architects, specifiers and engineers found that in three diverse climates, Exterior Insulation and Finish Systems (EIFS) with a vapor permeable Class III retarder, kept interior wall cavities warm even in the coldest months, thus preventing the possibility for condensation in the exterior sheathing. 



A study for architects, specifiers and engineers found that in three diverse climates, Exterior Insulation and Finish Systems (EIFS) with a vapor permeable Class III retarder, kept interior wall cavities warm even in the coldest months, thus preventing the possibility for condensation in the exterior sheathing. The study’s methodology, approach and observations are outlined in a white paper entitled “Evaluation of the Moisture Performance of EIFS Walls Without Interior Vapor Barriers” published by Dryvit Systems, Inc. Dryvit introduced EIFS to the United States in 1969, with billions of square feet put in place since. To read the white paper, visit  http://tinyurl.com/4q88639.