Fire separation semidetached buildings. Unless specified elsewhere,
all penetrations, holes or cracks found in any party walls between
buildings, not undergoing renovations must be restored to their original
fire separation rating in accordance to the fire and building codes
in place at the time of construction. If no required rating can be
determined for the time of construction, then such penetrations, holes
or cracks shall be covered with 5/8 fire rated gypsum board with tightly
fitting taped seams.
Exception: Party walls located in basements or cellars areas
subject to moisture, shall have all surface areas recoated with an
approved bonding cement or other such approved material to seal all
penetrations, holes or cracks.