What is the secret to designing and building foam-free, airtight and vapor-open assemblies that are super high performing? Jesper Kruse will provide a deep dive look into the Passive House wall and roof assemblies he has designed and installed in the backwoods of Western Maine over the past 10 years. His methods follow simple and accessible building science. All of Jesper’s assemblies are built with readily available materials. These assemblies are foam free and insulated with dense-packed cellulose.