AWNING
WINDOW
A projecting window, hinged at the top, that opens up and out
like an awning.
BAY WINDOW
A window projecting from the wall of a structure that is composed
of 3 or more individual windows, generally with the side
or flanker units at 45 degree or 30 degree angles to the
wall.
BRICK MOULD
Exterior casing around a window that covers jambs and provides
a means for nailing during installation.
BOW WINDOW
A window projecting from the wall of a structure that is composed
of 4 or more individual windows in a gently curved contour.
CASEMENT WINDOW
A projecting window hinged at the sides that usually opens
outward like a door.
CASING
Interior casing is a flat, decorative moulding which covers
the inside edge of the jambs and the rough opening between
a window unit and the wall.
Exterior casing, also known as brick mould, serves the same
purpose as interior casing. Exterior casing is also an installation
device through which nails are driven to install the window
unit into the wall.
DOUBLE HUNG WINDOW
Two vertically sliding sashes which by-pass each other in a
single frame. The sashes typically fit within vinyl balances
and tilt out and remove for safe, easy cleaning.
EXTENSION JAMBS
Flat wood parts that are nailed to the interior edges of a
window jamb to extend it in width and adapt to a thicker
wall. The inside edge of extension jambs should be flush
with the finished wall surface so that interior casing can
be nailed into it.
FRAME
Outside members of a window unit which enclose the sashes.
The frame is composed of side jambs, head jamb and sill.
GLAZING
The glass panes or lights in the sash of a window. Also the
act of installing lights of glass in a window sash.
GLAZING BEAD
A vinyl or wood strip, applied around the perimeter of the
glass on the exterior of the window sash that holds the glass
in place.
GRILLES-BETWEEN-THE GLASS
Aluminum bars in varying thicknesses and profiles sealed between
insulating glass panels to simulate muntin bars.
INSULATING GLASS
Two sheets of glass bonded together in a unit to enclose a
captive air space. Units are constructed with a metal spacer
inside the outer perimeter. The spacers contain desiccant
material for absorbing and holding any remaining moisture
in the air space. The outer edges of the glass are sealed.
JAMBS
Side jambs are the vertical pieces of a window frame. The head
jamb is the horizontal piece across the top of a window frame.
JAMB LINER
Vinyl or metal covering applied to the side jambs of double
hung and single hung windows. Jamb liners are generally formed
to include an integral balance system and stops for the exterior
and interior surfaces of the sash.
KEEPER
The receiving portion of a lock that interlocks with the lock
arm. The keeper is mounted to the upper sash check rail on
a double hung or single hung window, and to the inside surface
of the sash stile on a casement window.
OPERATOR
A metal arm and gear device which allows for easy opening and
closing of projecting (casement and awning) windows.
PICTURE WINDOW
A large stationary (non-ventilating) window which is designed
for an unobstructed maximum view.
RAILS
The horizontal top and bottom pieces of a window sash or door
panel.
REMOVABLE GRILLES
Ornamental or simulated muntins and bars designed to provide
a divided light appearance. Generally made of wood, grilles
are applied to the inside of the sash against the glass surface
for easy removal.
SASH
The framework that holds the glass in a window unit. The sash
is composed of two stiles (sides) and two rails (top and
bottom).
SASH BALANCE
A coiled spring or spiral system integrated into the jamb liners
that allows double hung or single hung sashes to open and
close. Sash balances also allow the sashes to remain open
in varied positions.
SASH LOCK
Generally, a cam-action lock applied to the check rails of
a double or single hung window, or sliding window to pull
the check rails tightly together. Sash locks are applied
to the open edges of a projecting window to seal the sash
tightly to the frame, providing security and weatherability.
SILL
The horizontal piece that forms the bottom of a window frame.
The sill is generally slanted down to the outside to shed
standing water.
SILL COURSE
The row of bricks, cement blocks or stones laid horizontally
at the bottom of a masonry opening.
SLIDING WINDOW
A window with two or more sashes that slide horizontally past
each other within the frame.
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