Building codes are continuing to adapt to changing environments and grow stronger based on an increasing knowledge of building science. Design pursuits such as Net Zero, LEED certification, and Passivhaus are no longer fringe movements but standards to pursue, and continue to gain greater adoption and traction in the marketplace. These trends lead many builders to ask, “What changes do I need to make to my standard construction practices? What materials or wall assemblies should I be researching and learning how to build with?”
To answer these questions, it is important to understand how a wall assembly performs in specific climates. Not every climate zone requires the same set of standards or materials. However, there are several simple guidelines that apply in most cases. An exterior wall needs to protect the interior of the building from moisture, air infiltration, temperature change, sound transmission, and occasionally extreme weather events.