Building Knowledge conducted the initial blower door test this morning, now that the wall and rim joist insulation is done and the vapor control layers are complete. The current Minnesota Building Code requires a maximum of 3 air changes per hour at 50 Pascals of pressure. The most stringent building standard, Passive House, requires a maximum of 0.6 ACH. Today's preliminary test resulted in 1.6 ACH; not at all bad!
It's likely that the final blower door test, near the end of construction, will result in a slightly better number than today's.
In other construction news, drywall has begun upstairs and siding continues on the exterior.