Minneapolis, Minn., Code of Ordinances § 12 § 244.530

Every window, exterior door and basement hatchway shall be reasonably weathertight, watertight and rodentproof; and shall be kept in a professional state of maintenance and repair. Every exterior window or door of habitable rooms, bath and toilet rooms shall be supplied with a storm window or storm door or the equivalent for ventilation, light and insulation. Unless otherwise provided for by written agreement, the owner or operator shall install such storm windows and storm doors not later than November first of each year. Such written agreements shall be applicable only to one- and two-family dwellings. All exterior doors of dwellings, except those which are required to be outswinging based on occupant load, shall be provided with a storm door unless the principal door has an "R" value of two (2) or more. The following energy conservation measures are required:
(1) Install weatherstripping between exterior operable window sash and frames and between exterior doors and frames.
Exception: Weatherstripping not required on storm doors or storm windows.
(2) Caulk, gasket or otherwise seal exterior joints between foundation and rim joist, around window and door frames, between wall and roof, between wall panels, at penetrations for utility services through walls, floors, and roofs and all other openings in the exterior envelope. (Code 1960, As Amend., § 72.050; 78-Or-222, § 1, 10-27-78; 80-Or-051 , § 1, 4-11-80; 82-Or-106 , § 2, 6-11-82; 83-Or-109 , § 2, 5-13-83; 83-Or-273 , § 1, 11-10-83; 85-Or-056 , § 1, 3-8-85)