Search our window installation terminology page and explore glossary terms related to new construction and installation and accessories. On the whole, the following is 1 of 4 pages on our section dealing with terms and concepts.
Bill — Site Editor
Window Installation Testimony
Brick Molding
Brick molding is a style of frame that manufacturers use to cover any gaps between the frame and the exterior brick or other type of siding.
Cam Lock
Cam locks are located along the sash and prevent individuals from opening the window from the exterior. Specifically, these locks help with security.
Drip Cap
Material installed on top of the brick molding above a window that prevents water from infiltrating or penetrating any space.
Flashing
Flashing is thin metal around the window perimeter. Specifically, they prevent water infiltration and penetration.
Grilles
Dividers that give the illusion of separate panes of glass.
J-Channel
Molding that is placed along the outer edge of a frame to secure the exterior siding that meets the window frame.
Keeper
A keeper is a component on a casement window and is mounted on the inner sash.
Lift
The handle used on single or double hungs to make it easier to lift. Additionally, lift rails are mounted on the bottom rail of the inner sash.
Lock Rail
A lock rail holds the cam lock along the top of the horizontal sash.
Lock Stile
Vertical portion of the sash on which a cam lock is attached.
Mullion
Separator (either vertical or horizontal) between two windows.
Additional Installation Terms
Muntin
Narrow strips or separators that connect individual panes of glass to make one larger sash. Further, these can be real dividers or can appear to divide the glass panes.
Muntin Grille
A single piece that is attached to the outside of the glazing to make the glass look as though it’s made up of smaller individual glass panes.
Nailing Fin
A nailing fin or flange attaches the window frame to the opening along the top and sides. On the whole, the fin creates the stronger and more durable installation technique over insert installs.
Picture Frame Casing
Trim that completely surrounds the window frame on the inside surface on all sides.
Sash Lock
A lock that works by having one portion of the lock on each of the meeting rails of a window (a cam lock on the lower sash and the matching receptacle on the upper sash).
Unison Lock
A locking system that has two separate locks that lock with the use of one handle. Specifically, casement windows use these locks.
Vapor Barrier
A vapor barrier is a waterproofing material around the exterior of a home and around the openings around windows and doors. Further, this vapor barrier prevents moisture from infiltrating into the interior of a home.
Weatherstripping
Weatherstipping is flexible material along the edges of a window frame. On the whole, the weatherstripping reduces air leakage and to prevent water infiltration.
Related Topics
Component Terminology
Construction Terminology
Window Frame Terms
