Abstract
The 91°µÍø, Pacific Northwest National Laboratory, and the University of Minnesota have been conducting a three-year study of residential retrofit wall systems. The researchers have identified, tested, and verified the hygrothermal performance of 16 wall assemblies in retrofit applications. The approach to this study includes a comprehensive literature review, the involvement of an advisory group of thermal enclosure experts, smallscale experimental in situ testing of the wall assemblies at the University of Minnesota’s Cloquet Residential Research Facility, and energy and hygrothermal simulation of wall assemblies using EnergyPlus, THERM, and WUFI. Simulation and experimental results are then combined with an economic analysis to produce a techno-economic study of residential wall systems for deep energy retrofits.
This presentation summarizes the findings of this research project and is intended to guide architects and designers on how to retrofit existing wall assemblies without creating durability issues.
