Worked layout
Single-row picture-frame molding
Example measurements
- Layout area
- 120 × 84 in
- Molding face
- 2 in
- Top / bottom margins
- 6 in
- Side margins / column gaps
- 4 in
- Row gap
- None
Layout result
- Frames
- 4
- Horizontal pieces
- 8
- Required molding
- 64 ft 8 in
Compare on the same wall
Only the named layout setting changes. Wall measurements stay the same.
3 columns
4 in clear width / gap · 12 pieces on Wall A
Try this variation →4 columns
4 in clear width / gap · 16 pieces on Wall A
Try this variation →5 columns
4 in clear width / gap · 20 pieces on Wall A
Try this variation →Judge the tall frame before choosing its gap
Choose one box in the drawing and follow its outside edge. That rectangle is the molding’s footprint on the wall. The clear interior is smaller because the molding faces occupy space on all four sides. If a painting, mirror, or cabinet is meant to sit within the box, compare it with the clear interior rather than the outside width.
This tall, unsplit composition can suit a wall where you want artwork to occupy one continuous field. It becomes less useful when a switch, shelf, or built-in cuts across that field. Locate those objects first; a visually even row is not a good fit if it frames an obstruction you would rather leave outside.
The example uses equal end spacing. Compare the outside gaps with the spaces between boxes, especially beside substantial casing. Wider end margins can give the whole group more separation from its boundaries. Treat that as a composition choice and check the narrower frames that result.
Compare three, four, and five frames
Hold the layout width, height, molding face, and vertical margins steady while comparing the neighboring counts. Fewer boxes leave broader interiors; more boxes create a finer division of the wall. Look at whether your focal object falls inside a frame, between frames, or across a molding edge. A preferred count should work with that object as well as with the empty wall.
The two-row companion introduces a horizontal split and also changes the column count. Its comparison therefore shows a different complete composition. To judge the row split alone, open an alternative and keep the columns and other dimensions fixed while adding the second row. Read the revised frame heights and cut schedule instead of assuming the original boxes simply divide in half.
Set the available rectangle before copying a frame size
Measure between the actual left and right limits of the composition, then identify the lower and upper limits. These may be casing, existing trim, or chosen lines on plain wall. Set margins inside that rectangle before selecting the frame count. Copying a box width first can leave the remaining end spaces to absorb every difference between the example and your room.
Check width near both the proposed top and bottom molding lines. Record the outside boundaries of outlet covers and any casing that enters the area. If an object conflicts, compare the whole group with a different count or margin. Shrinking one box is an intentional custom composition; it should not be an unnoticed repair to an equal-width row.
Read and test the miter cuts
The long point is the outer tip of a mitered piece; the short point is its inner reference. Use the labeled lengths for each side of the selected frame and keep track of which edge of the profile faces inward. A correct length cut with the profile reversed can still produce the wrong corner.
After choosing the layout, confirm usable stock, kerf, end trim, and spare material. Make one sample corner and check both the outside footprint and clear opening against your marks. Label the top, bottom, left, and right pieces even when lengths repeat. Local plaster variation and corner fit need attention at the wall; changing the inter-frame gap does not correct them.
Questions about this layout
Are the listed frame sizes inside or outside?
The plan distinguishes the outside footprint from the clear interior. Use the footprint to place the box, the interior to check what fits visually inside it, and the labeled long and short points to identify the cuts.
Can the end margins differ from the frame gaps?
Yes. Set the side margins independently when the wall calls for it, then review the resulting frame widths. More space at the ends leaves less width for the boxes.
When is a single row preferable?
Compare it when you want tall uninterrupted interiors for artwork or when a horizontal row split would conflict with furniture or wall controls. Judge the proposed corners at room scale before choosing.
Sources and assumptions
- TrimLayout Calculation MethodsDefinitions of clear gaps, measurement references, finished pieces, and material allowances used in these examples.
- NIST: SI Units — LengthUnit relationships for converting measured lengths; this source does not prescribe decorative proportions.