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of woodwork, be beneath the level of the lowest timbers or woodwork
of such floor, and shall in every other case be not less than one inch
below the level of the upper surface of such floor.
(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 lowest horizontal damp-proof course therein
to a height of at least six inches above the surface of the contiguous
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 gully shall adjoin
the room and shall extend either
(a) throughout the entire length of one side thereof ; or
(b) 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 not less than one-seventh of
the floor area of the room) for three feet on each side of such
window or windows.
Any such area shall be not less than two 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 an area, the width thereof in front of such
window may be one foot at the least; and
(b) that any steps necessary for access to any part of the building
comprising the room may be placed in or over such an area or open
space if they are so placed as not to be over or across any window of
the room required by the regulation in that behalf.
8. (i.) The room shall be effectually lighted by means of one or
more windows opening directly into the external air.
(ii.) Every such window shall be so constructed that one-half at
the least may be opened and that the opening may extend to the top
of the window.