Passive House standards are the strictest residential-building parameters in the United States. Because of that, details such as window selection and the continuity of a bead of caulk can make the difference between whether or not a house is tight enough to meet the standards. Architect Steven Baczek describes in this article how he built a Passive House with standard building materials and construction techniques. Key to the project's success was lots of planning and buy-in from everyone involved: the homeowner, the architect, the energy consultant, the general contractor, and the subs. Together, they built a house that conforms to Baczek's goal in building high-performance houses: They should convert energy as inexpensively as possible and hold on to that energy for as long as possible. Baczek provides detailed construction plans for the following tasks: building double walls (one 2x4 and one 2x6), insulating above the slab, breaking the thermal bridge at the second floor, using a vented truss roof, and detailing windows in thick walls. Baczek believes not only that this house is the best one he's ever designed, but that it can be replicated by any homeowner, builder, or architect.