A common wall construction
in the post-war period but rare at earlier times. It comprises two layers of (usually)
brick and sometimes concrete block with a gap (cavity) between them to restrict
dampness and improve insulation.
A wood or steel beam which carries the ceiling beneath
Damp Proof Course
A horizontal layer of impervious material laid in a wall to exclude water usually
at 6" (15 cm) above ground level. A damp proof course subsequently installed
in an older property will usually take the form of a series of chemical injections
into the brickwork.
An impervious layer under a concrete floor or similar
designed to exclude water.
The lowest overhanging part of a roof.
A strip of lead, zinc or other impervious material which excludes water form the
junction between a roof covering and another (usually vertical) surface such as
a chimney stack or parapet.
The outstanding edge formed by the meeting of two roof surfaces.
A wood or steel beam which directly supports a floor.
See Floor Joist or Ceiling Joist.
A low wall which projects above a roof surface, sometimes at the edge of it and
sometimes marking the line of junction between two properties.
Structure (Party Wall, Party Chimney Stack, Party Parapet etc)
Any such structure which is built on the line of junction of two properties and
where ownership is shared between the two adjoining property owners.
The main horizontal beam in a roof which supports the common rafters and ultimately
the roof surface.
A sloping timber extending from the eaves to the ridge of the roof.
A channel along the edge of a roof to collect rainwater.
A pipe which takes rainwater from a roof or gutter.
The apex of a roof, usually a horizontal line.
A wall under the wooden ground floor of a house with no
basement supporting the floor joists usually with a few bricks omitted for ventilation.
A wall of any masonry material (but usually brick or concrete
block) which consists of a single layer of brickwork (of any thickness) and which
does not have a cavity.
The intersection between two sloping surfaces of a roof
towards which water flows - the opposite of a hip.
The connecting piece between the two layers of a cavity
wall installed at intervals.