At the Passivhaus job site in Falmouth, Massachusetts, architect Steve Baczek specified double-stud walls. The frame of a Passivhaus may not be as exciting as the thick layers of insulation, the high-tech mechanical systems, or the triple-glazed windows, but it plays a very important supporting role in achieving success.
Every component of the framing package in this house was chosen with care and for a specific reason. The exterior Zip System sheathing provides airtightness, the double-stud walls and raised-heel roof trusses are a cost-effective means of supporting or containing above-average levels of insulation, and the open-web floor trusses easily span the open floor plan and provide plenty of room for the many ducts necessary for the Zehnder ventilation system and supporting mechanicals.
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GBA Pro members have access to all of the videos in the Passive House video series.
Here is the link to the “Framing for Efficiency” video.
To see Episode One of the series, click here: “Passive House Design.” (The first episode is available to all GBA readers, including non-members.)