This system is designed to fit into the window 'reveal' i.e. between the side walls of a window opening and the top and bottom sills. 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.
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. >
Basically, a reveal is the timber surround of a window that the window frame itself is attached to. Imagine this: if you sit a small pot plant against the window in your loungeroom so it can get some extra sun, you'll likely rest the plant on the flat timber edge that juts out slightly away from the glass.
A variety of reveal sizes are available depending on your construction. The size of the reveal is the combined width of the timber stud, the internal lining and cavity (for brick veneer). The standard reveal material is primed pine.
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.
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.
In carpentry, a reveal is a feature resembling a rabbet, but constructed of separate pieces of wood. 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).
The jambs of a window outside the frame are called reveals. Small shafts to doors and windows with caps and bases are called jamb-shafts; when in the inside arris of the jamb of a window, they are sometimes called scoinsons. A diagram of a door, with the jambs labeled.
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.
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).
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.
The reveal should be wide enough to accommodate the thickness of the door and provide a secure fit, but not so wide that it becomes visually distracting or takes up too much space in the doorway. The shape can also vary.
Rough opening measurements need to be as precise as possible so that your window will fit securely into the available space. That means measuring the rough opening's width, height, and depth in multiple areas.
Golden ratio, or the Divine proportion, is the division of a segment into two parts so that the ratio of the larger and smaller parts is equal to the ratio of the whole segment and the larger part. That ratio, also called Fi, is approximately 1.618.
To convert any fraction to decimal form, we just need to divide its numerator by denominator. Here, the fraction is 1/4 which means we need to perform 1 ÷ 4. This gives the answer as 0.25. So, the decimal equivalent of 1/4 inches is 0.25.
Measure the width of the top of the opening where the top piece of door trim will be installed. To this measurement add 3/8". This will leave a slight (3/16") reveal around the door frame. This is the reveal I like to use.
While there is no unwritten rule that all exterior trim should match, matching can make a lot of design sense and make the design appear well thought-out.
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.
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.
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").
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.
Cast Stone Heads and Lintels. A window head is the stone which spans the aperture above a window, and a door head spans the aperture above the door. These are non-structural decorative features that enhance the visual appearance of a project.
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.