Use and Care Manual

GLOSSARY OF TERMS
Astragal: The center member of a double door, attached to the fixed or inactive
door panel.
Casing: A flat, decorative moulding that covers the inside edge of the jambs
and the rough openings between the window unit and the wall.
Cladding: A low-maintenance material, such as vinyl, on the exterior of a window
or patio door unit.
Divided light: Glass of a sash or patio door panel that is separated into smaller
sections using muntins or grilles.
Double glazing: The use of two panes of glass in a window or door to increase
energy efficiency and performance.
Extension jambs: Flat wood parts that are fastened to the inside edges of a
window jamb to extend its width and adapt it to a thicker wall. The inside edge
of an extension jamb should be flush with the finished wall surface.
Flashing: A metal or plastic strip attached to the outside of the head or side jambs to
provide a weather barrier and to help prevent leakage between the frame and the wall.
Frame: The outside member of a window or door unit that encloses the sash or
panel, respectively; composed of side jambs, head jamb and sill.
Gasket: A continuous strip of flexible material used to create a weathertight seal
between the sash and frame of roof windows or patio doors.
Glazing: The glass panes in the sash of a window or panel of a door. Also, the
act of installing glass panes in a sash or panel.
Glazing bead: A plastic or wood finishing strip applied to the window sash or door
panel around the perimeter of the glass on the outside.
Glazing stop: The part of the sash or door panel that holds the glass in place.
Grille: Ornamental or simulated muntins and bars which don’t actually divide the lights
of glass. Generally made of wood on the interior side of the sash and Fibrex
®
material
on the exterior. Some wood interior grilles can be removed for easier cleaning.
Head: The main horizontal member forming the top of the window or door frame.
Head board: A flat board cut to fit the contour of a bow or bay window, and
installed between the head jambs and the flat wall surface.
Insect screen: Lightweight aluminum frame with screen mesh applied. Designed
to keep insects out when window is open. Insect screens will not stop a child
from falling out of the window. Keep children away from open windows.
Interlock: Part of the weatherstrip system. Two separate pieces of material attached
to a gliding window or gliding patio door that meet and lock within each other to
create a weathertight seal when the window or door is closed.
Header: A heavy beam extended across the top of a rough opening to prevent
the weight of a wall or roof from resting on the window frame or doorway.
Jack studs: Framing members, generally 2x4 or 2x6 boards, that form the inside of
the rough opening for a window or door. They run from the sole plate to the header,
and support the header.
Jamb: The main vertical members forming the sides of a window or door frame.
Jamb liner: Metal, plastic or wood covering the inside surface and head and side
jambs of sliding windows.
Lift: A handle or grip installed on the bottom rail of the lower sash of a
double-hung window to make it easier to raise or lower the sash.
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