Every window shall be substantially weather-tight, maintained in good repair and sound condition for its intended use and shall comply with the following:
A. Every window shall be fully supplied with glass window panes or an approved substitute without open cracks and holes.
B. Every window sash shall be in good repair and sound condition and fit weather-tight within its frames.
C. Every window frame shall be maintained so as to exclude rain as completely as possible and to substantially exclude wind from entering the building.