Innovative solutions for high-R walls are critical for achieving zero-energy-ready homes.
In order to maximize the energy efficiency of a home’s structure, high-performance homes employ walls with high R-values (high-R walls). These wall systems use cost-optimized insulation and air-tightness to provide an extremely high-performance building envelope that contributes to the goal of reaching zero-energy-ready performance levels. Increasing insulation quantity raises the wetting potential of walls, due to lower temperatures on the cold side of exterior sheathing or interior drywall. This setup also reduces the drying potential with less thermal flow through the assembly, resulting in an increased risk of moisture-related problems due to condensation, which can be significant without proper attention to detail. To help builders deliver zero-energy-ready homes with high-R walls, the U.S Department of Energy’s (DOE) Building America program provides proven research results for effectively managing high-R wall moisture risks in all climates.