Learn the parts of your Pella window.
1. Frame
The combination of the head, jambs and sill that forms a precise opening in which a window sash fits.
2. Glass
A framed sheet of glass within a window frame.
3. Grilles
Any bar that divides window glass into smaller panes. Also called a muntin, grid or windowpane divider.
4. Head
The main horizontal part forming the top of the window frame.
5. Jamb
The main vertical parts forming the sides of a window frame.
6. Sash
A single assembly of stiles and rails made into a frame for holding glass.
7. Sill
The main horizontal part forming the bottom of the frame of a window.
More Parts
Aluminum clad
Exterior wood parts covered with extruded aluminum, with a factory-applied finish to deter the elements.
Argon
An inert, nontoxic gas used in insulating glass units to reduce heat transfer.
Balance
A mechanical device (normally spring-loaded) used in single- and double-hung windows as a means of counterbalancing the weight of the sash during opening and closing.
Casing
Exposed molding or framing around a window or door, on either the inside or outside, to cover the space between the window frame or jamb and the wall.
Check rail
The bottom horizontal member of the upper sash and the top horizontal member of the lower sash which meet at the middle of a double-hung window.
Emergency exit window
Fire escape window (egress window) large enough for a person to climb out. In U.S. building codes, each bedroom must be provided with an exit window. The exact width, area, and height from the floor are specified in local building codes.
Fixed panel
An inoperable panel of a sliding window.
Frame
The combination of the head, jambs and sill that forms a precise opening in which a window sash fits.
Glass
A framed sheet of glass within a window frame.
Grilles
Any bar that divides window glass into smaller panes. Also called a muntin, grid or windowpane divider.
Head
The main horizontal part forming the top of the window frame.
Integrated Crank with Fold-Away Handle
A window crank that folds in on itself, improving operation and aesthetics by not interfering with roomside window treatments.
Jamb
The main vertical parts forming the sides of a window frame.
Lift
Handle for raising the lower sash in a double-hung window. Also called sash lift.
Lock handle
A locking mechanism located on the handle of a window.
Mullion
A major structural vertical or horizontal member to combine two or more windows together.
Operator
Crank-operated device for opening and closing casement or awning windows.
Rail
Horizontal member of a window sash on a double-hung or single-hung.
Sash
A single assembly of stiles and rails made into a frame for holding glass.
Sash lock strike
A lock attached to the sashes of a double hung window that can fix both in the shut position. Secures window and reduces rattling.
Screen
Woven mesh of metal, plastic, or fiberglass stretched over a window opening to permit air to pass through, but not insects.
Screen strike
A device fixed in or on a screen into which the lock or latch bolt engages when the window is closed.
Sill
The main horizontal part forming the bottom of the frame of a window.
SureLock®
Pella patented window operating system that reaches out to pull the window sash against the weatherstripping for a tight seal.
Vent
The movable framework or sash in a glazed window that is hinged or pivoted to swing open.
Weatherstripping
A strip of resilient material for covering the joint between the window sash and frame in order to reduce air leaks and prevent water from entering the structure.
Weep Holes
The individual openings provided in the window sill to allow water or condensation to escape.
Weep System
A series of tiny openings in the sill that allow unwanted moisture to drain to the outside.
Egress window
A window big enough and low enough to the ground — per local building codes — that allows occupants to escape through the opening in an emergency, such as a fire.
Hinged glass panel
The roomside glass panel on Designer Series® windows and patio doors that opens to allow access to our snap-in between-the-glass blinds, shades, decorative panels and grilles.
Dust pads
Small, cloth-like pads used to seal the gap at the corner of a window or door.
Gaskets
Rubber strips applied to the top and sides of doors, and into double-hung and sliding window channels, to seal out air and water.
Mortise and Tenon Joint
A joint where one piece of wood is inserted into the other.
Blocking Resistance
The capability of a paint, when applied to two surfaces that touch, not to stick to itself.
Shim
A shim is a thin and often tapered or wedged piece of material, used to fill small gaps or spaces between objects.
Jambliner
A strip which goes on the sides of a window frame to provide a snug fit for the sash.
Lock strike
The opening that receives the bolt of a window or door lock.