Conversion of old Pillsbury mill in Minneapolis to apartments requires major envelope work
The conversion of the 130-year-old Pillsbury A-Mill in Minneapolis to an apartment building will require extension new insulation and weatherproofing, accounting for 10% to 20% of the $140 million project budget. The mill and two other historic buildings on the property are slated to be converted into 251 apartments.
Because the former mill’s machines produced so much heat, the structure never needed to be insulated against winter weather. Now, the building team has to figure out how to insulate walls and windows without violating Minnesota’s rules on historic preservation, or trapping moisture against old stone, terra cotta, and brick.