What is window reveal size?

Author: Clinton Orn  |  Last update: Tuesday, November 25, 2025

Reveal Size = Internal lining (say 10mm) + Stud Size (say 75mm) = 85mm (use closest standard size 86mm) If bracing ply is used, you need to add the thickness of the bracing ply to your reveal size also. Diagram 1: Window with reveal for External Cladded Applications.

What is the reveal of a window?

A Window Reveal is the surround of a window, of which the bottom forms the ledge, on which you may choose to place an item. It is technically referred to as the “reveal” or “liner”. These words are used interchangeably.

How much reveal should a window have?

Typically, an installed window should have an 8–10 mm gap between the back of the reveal and the framing trimming the opening. This tolerance allows the window to be fitted into the opening and trued as well as giving sufficient space for the air seal. >

What is the standard reveal for window trim?

Mark the Reveal Lines

Installing the trim slightly away from the jamb edges will help hide discrepancies. This intentional gap is called a reveal. Use a tape measure and a sharp pencil to mark the jamb 1/8 to 1/4 inches from the inside edge on all sides of the window.

What is a window reveal depth?

The outside reveal depth gives the extent to which the glazing is offset into the wall. As shown in the diagram on the Frame and Dividers page it is the distance from the exterior surface of the wall to the glazing outer surface (in m or ft).

Window reveal sizes

How to determine window reveal size?

The size of the reveal is the combined width of the timber stud, the internal lining and cavity (for brick veneer).

What is the gap between window frame and reveal?

This gap is usually about 1/4 to 1/2 inch (that's around 6 to 12 mm). It might seem odd, but it's there for a good reason. This gives room for the materials to expand and shrink a bit when the temperature changes and also lets the building settle or shift slightly over time without messing up the window.

How big should trim reveal be?

The standard reveal for window molding and door trim is 1/4-in., but this can be adjusted a little if needed. A combination square works well for marking reveals. The first step in any trim job is to prepare the jambs for trim. If you're replacing trim, pry it off and remove the nails from the jamb.

What is the difference between a reveal and a jamb?

A jamb (from French jambe 'leg'), in architecture, is the side-post or lining of a doorway or other aperture. The jambs of a window outside the frame are called reveals.

Why does window trim have a reveal?

A window reveal is used to fix the window itself into the stud wall frame. The main purpose of a reveal—regardless of which type you choose—is to provide extra support to the aluminium frame of the window unit.

Do you need reveals on windows?

Traditionally, most windows and doors needed reveals and architraves, but now this is not always the case. Square set plaster provides the much-coveted clean-line look and eliminates reveals and architraves.

How to mark a trim reveal?

This intentional gap between the trim and edge is called a reveal.
  1. You'll need a set square to calculate the side lengths of the trim. ...
  2. Place a sharp pencil against the end of the set square blade, and run along the length of the jamb, drawing a line for the reveal.

What is the normal window opening size?

Standard double hung kitchen window sizes range from 24–48 inches in width and 36–72 inches in height. Standard casement window sizes range from 14–35.5 inches in width and 17–73 inches in height. Bedrooms: Building codes do apply to upper-level bedrooms, requiring a large enough opening for escape in emergencies.

What is a reveal in trim?

A reveal may typically be seen at the edge of a door or window, where the face molding is set back, often by a distance from 3/16" (5 mm) to 1/2" (12 mm). (This noun is unrelated to the verb reveal but is from the obsolete verb revale 'to lower, bring down,' which is related to vale and valley.)

Can you tile a window reveal?

The top reveal

Using a board, or plywood and some supporting battens, the tiles can be stuck with adhesive and then immediately supported. Tiling the top reveal is best done before the sill, meaning you don't need to worry about disturbing the sill when you wedge your supporting battens there.

What is an external window reveal?

Reveals: Reveals are recessed areas or grooves added to windows, doors, and other openings. They create shadow lines and dimension, accentuating existing features. Mouldings: Mouldings are pieces of decorative trim suitable for both interior and exterior use.

How to measure a window reveal?

The height H is the distance from the underside of the top sill to the bottom window sill. The width W is the measurement between the two side walls of the reveal. We advise taking 3 measurements for both height (left, middle & right) and width, (top, middle & bottom) to allow for any variations.

What is a reveal and why is it important?

The reveal (also known as the big reveal) is a plot device in narrative structure and is the exposure to the reader or audience of a previously unseen key character, or element of plot or performance.

What is a frame reveal?

Double Mat When mats are layered in a picture frame, the top mat forms the main border and the bottom mat shows slightly, just around the image (called the "reveal").

What size reveal for window casing?

THE REVEAL

The most finished effect will be achieved if your Casing is set back approximately 1/4" from the edge of the window or door opening (the jamb). This offset is known as a reveal. It's the finishing carpenter's trick to hide minor differences in the trueness of the opening.

Should the window sill be wider than the window?

If your expectations are more than just a design element, it could also be much wider than the window. However, as in the case of a window sill that sticks out from the wall, you should consider some form of additional support. A standard assumption is that window sills are 3 to 5 cm wider than the window on each side.

Is rope caulk effective?

Among the most common sources of air leaks in a house are windows. As a result, windows are responsible for anywhere from 10 to 25 percent of the energy bill. Sealing windows with rope caulk limits the amount of drafts entering a home, which will ultimately lower the amount of money spent on the energy bill.

How much bigger than the window should the frame be?

What if you already ordered windows and now you need to calculate the rough opening size? In this situation you just take the size of the window and add the recommended amount of space, usually, half an inch so that there is 1/4" of space on each side.

Should you seal under a window sill?

Don't get caulk in weep holes

These windows usually have a sloped lower sill that redirects water away from the windows. Caulking over weep holes will cause a big problem because it will stop them from doing their job: preventing rot, mold, or rust from developing.

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