What is the interior trim of a window called?

Author: Ellsworth Fritsch  |  Last update: Saturday, October 18, 2025

Casing is the decorative molding or framing around a window that is used to cover the space between the window frame or jamb and the wall. Hinged Glass Panel.

What is the interior trim around a window called?

Casing: Trim used for door and window openings. The outer casing cuts the outside of windows and doors. The inner casing cuts inside the perimeter of windows and doors.

What is the inside part of a window called?

IGU – Insulated Glazing Unit. The IGU includes the window's glass panes, the spacer, and the inert insulating glass between the panes. Together, this IGU assembly sits inside the window sash.

What is the interior window sill called?

Depending on where you are located, the term 'window sill' could be used to describe only exterior mouldings. As an example, in the United States, the internal sill is typically known as 'stool. ' In some cases, UK manufacturers would call it 'cill' or 'window board. '

What is the plastic strip around windows called?

That plastic strip is called glazing bead.

Trim Caulking Secrets That Will Change The Way You Caulk!

What is a mullion strip?

A mullion is a vertical element that forms a division between units of a window or screen, or is used decoratively. It is also often used as a division between double doors.

What is the recess around a window called?

A window recess (or window reveal) is the distance between the surface of a window pane and the the wall that the window is built into. In order to determine whether you will be designing/installing an inside or outside mount, we need to first work out whether the window has a reveal and, if so, how deep it is.

What is an interior window jamb?

Window jambs include mechanisms like tracks or rails that enable windows to open and close by sliding vertically or horizontally. They also support latches, hinges, deadbolts, and hardware for locking the window and keeping your home secure.

What is the seal around a window called?

A window gasket, also known as a window seal or seal gasket, is something that is fitted to your window frame to prevent the entrance of draughts and water to your home.

What holds a window frame in place?

The window will either be flush with the inner wall surface or set back from it, depending on the thickness of the wall. The frame is held in place with nails or screws. Windows in old houses usually have a stone or concrete subsill which sits below the window frame and any wooden sill on the outside of the house.

What goes around windows inside?

Casing is the decorative molding or framing around a window that is used to cover the space between the window frame or jamb and the wall.

What is the aluminum trim around a window called?

The trim around a window is called the casing.

What is window casing?

Casings are the moldings that go around the window frames. They are installed outside the house to seal the window frame to the house blocking cold air from entering the interior. Inside, casings are the finishing touch to a window installation, the same as baseboards and door moldings finish off a room.

What is the inside of a window frame called?

Sash. The part of the window that holds the glass and opens and closes is called the sash. Window sashes and frames can be made out of several different kinds of materials including wood, aluminum, fiberglass, composite, and vinyl.

What is an interior trim?

Interior trim consists of pieces of wood or other materials that surround windows and doors or run along the floors and ceilings on the inside of homes. Trim usually covers gaps between transitions in building materials or covers up any imperfections between the walls, floors, and ceilings and creates a seamless look.

What is the trim between window panes called?

True Divided Light (TDL): Individual panes of glass are separated by muntins. Simulated Divided Light (SDL): Muntins are placed on both sides of a single pane of glass to mimic the traditional look. Grilles Between the Glass (GBG): Muntins are placed between two panes of glass, making cleaning much easier.

What is the edging around a window called?

The terms window casing and trim are used interchangeably to describe the decorative wood that surrounds the perimeter of the window to cover the space between the wall and jamb.

What is the plastic trim around a window called?

Casing. The casing is the molding that goes around the window frames on the exterior of the house. They seal the window frame to the house and prevent outside air from entering your home.

How to seal a window from the inside?

How To Seal A Window From The Inside?
  1. Step 1) Remove Existing Sealant (If There Is Any) ...
  2. Step 2) Clean And Degrease Window Frames. ...
  3. Step 3) Prepare The Silicone. ...
  4. Step 4) Apply Sealant Around The Window Perimeter. ...
  5. Step 5) Smooth Silicone.

What is another name for window casing?

CASING or CASEMENT

Also called the trim or molding, casing surrounds the window, between the wall and jambs.

What is an interior window sill?

A window sill, also known as a window ledge or window bottom, is the shelf-like, flat piece of the window trim found at the base of the window. Window sills are important to the design and functionality of the window.

What is a mullion?

mullion, in architecture, a slender vertical division between adjacent lights or subdivisions in a window or between windows in a group. Mullions appear with the invention of tracery and are particularly characteristic of Gothic architecture and early Renaissance architecture in northern and western Europe.

Can you replace window casing?

After you remove the old casing, you may want to add extra insulation around the window before you hang the new casing. After you remove the old casing, you may want to add extra insulation around the window before you hang the new casing.

What is the recess of the window?

The recess is the 'hole in the wall' in which your window is installed. Usually, there will be plasterwork at the left, right and top, and a window sill finishing the bottom of the recess. If you intend to recess fit your blind, then measure the recess width and drop and select 'recess size' when submitting your sizes.

What is a window lintel?

Window lintels are beams that run along the top of windows in order to support and properly distribute the structure's overall weight. In the past, they would most often be found in masonry or brick structures, but nowadays they are a requirement in any building without proper weight support.

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