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135
(ii.) No part of any wall of the room shall where it is
practicable to avoid it be in contact with the
ground or earth, provided that where any wall of
the room is in contact with the ground or earth,
such wall or such part thereof as is so in contact
shall unless constructed as a hollow wall have an
efficient vertical damp-proof course extending from
the base thereof to a height of at least six inches
above the surface of such ground or earth.
6.—Unless the room is provided with a fireplace and a flue
properly constructed and properly connected with such fireplace
it shall be provided with special and adequate means of ventilation
by one or more suitably placed apertures or air shafts.
7.—An area or open space properly paved with impervious
material and effectually drained by means of a properly trapped
gulley shall adjoin the room and extend either throughout the
entire length of one side thereof or at least throughout the entire
width of any window or windows required by these regulations
and (except where the area of such window or windows shall be
of not less extent than one-seventh of the floor area of the room)
for three feet on both sides of such window or windows.
Such area or open space shall be not less than four feet wide,
in every part thereof and shall be open upwards from a level three
inches below the level of the damp-proof course in the adjoining
wall of the room.
Provided (a) that where a bay window in the room having
side lights overlooks such area the width thereof
in front of such window may be three feet
at the least.