A part installed on the inactive door panel in double
hinged doors and with double casement windows which closes
the gap between the panels when closed and typically holds
weatherstripping to seal the two.
Anchoring
Used to specify how a window or door will be anchored
into an opening. All windows and doors must be structurally
fastened for good long term performance. The Nail Fin
is NOT a structural fastener!
Casing
Interior trim wrapping a window or door, which spans from
the jamb or liner over the shim space and onto the finished
wall.
Egress
An opening or exit. Fire codes require buildings to have
adequate egress exits from all bedrooms. Bedrooms need
not have doors to the exterior, but minimum window sizes
must be provided to meet codes.
Fin
Also known as nail fin or nailing flange) – A vinyl
extrusion applied to the frame of a window. It was designed
as an interface to connect the frame with the building
paper or other membranes. It is commonly used to attach
windows from the exterior by nailing through the extrusion
into the sheathing. Using the nail fin alone IS NOT sufficient
to achieve proper fastening of the window or door.
Flashing
Aluminum sheet metal bent to provide protection from under
the building paper out and over window and doorframes,
protecting against water backing up against the building.
We recommend flashing at the head of all windows and doors.
Glazing
To fit with glass. Insulating glass is often referred
to as glazing.
Insulating
Glass
Made up of two (or more) pieces of glass separated by
a spacer bar, creating a dead air space that creates an
insulating airspace.
Jamb
The vertical side of a window/door is called Jamb.
Mullion
A horizontal or vertical “T” shaped extrusion
that separates the panes of a window.
Heel Size
The exact dimension of a window or door frame. This is
typically a little smaller than the rough opening, allowing
a shim space at the perimeter.
R.O.
Rough opening. The dimensions of the opening into which
a window or door will be placed. See Heel size.
Sash
A frame that holds the glass panes of a window or door,
the operable section of a window.
Sheathing
The exterior plywood placed on a building over the framing
and under the exterior siding.
Sill
Doors use a sill across the bottom. The design of the
door sill will vary depending on the type of door, door
operation and weather conditions.
