DecoMoldings

inspiration · Picture Frame

BM Simply White Staircase Wall Molding

BM Simply White Staircase Wall Molding: wall elevation, color data (LRV 92.5), staircase layout for 8, 12, 16 ft walls, cut list, calculator and pre-cut kits.

Catalog snapshot View 2 sources ↓

Project calculator

Wall molding linear-foot estimate

Estimate for rectangular molding frames.

Estimated quantity109.08 linear feet

Divide by 7.87 ft (240 cm stick) and round up for the number of sticks.

Formula & assumptionsframe_count * 2 * (frame_width_inches + frame_height_inches) / 12 * (1 + waste_percent / 100)

Assumes identical rectangular frames. The waste allowance is editable. The estimate does not optimize cuts or include separate rails, baseboards, or other trim.

Overview

BM Simply White (OC-117) is a white with a green undertone and a calculated LRV of 92.5. Against white trim the contrast ratio is 1.03:1, which gives almost no contrast, so the molding reads through shadow alone (a tone-on-tone look); painted tone-on-tone, the picture frame pattern shows only through its shadow lines.

Picture Frame layout on a 12 ft staircase wall

Molding over the full wall height, upper and lower rows divided by a chair rail. On a 12 ft wall with an 8 ft ceiling this gives 5 frames per row, each 24 in wide, with 50 in upper and 21 in lower frames. The layout uses about 37.27 m of 2.5 cm molding, or 16 sticks of 240 cm, including 10% waste. Frames follow the stair angle: keep the bottom rail parallel to the stringer.

Building the picture frame pattern

Each frame is four pieces of 2.5 cm molding with 45 degree miters. Set the frames out from the center of the wall, keep every gap equal, and let the margins at the corners match the gaps.

Painting molding in BM Simply White

Whites show molding through shadow only, so side light (a window or wall sconce) brings the pattern out. Use satin on trim and eggshell on the wall to add a slight sheen difference.

Wall elevation

BM Simply White wall, tone-on-tone trim, picture frame layout on a 12 ft wall. Colors are screen approximations.

Color data

ColorBrandCodeHexCalculated LRVUndertoneDepthContrast vs white trimContrast vs black trim
BM Simply WhiteBenjamin MooreOC-117#F7F7EE92.5greenwhite1.03:115.3:1

Trim color pairings

PairingTrim colorHexContrastEffect
tone-on-toneBM Simply White#F7F7EE1:1Trim painted the same color as the wall
matching whiteBM White Dove#EFEEE51.08:1White with the closest undertone
contrastBlack#1F1F1F15.3:1Dark trim for a graphic outline

Staircase wall sizes: picture frame accent wall layout

Wall widthFrames per rowFrame widthFrame height (upper / lower)Molding incl. 10% waste240 cm sticksChair rail pieces (300 cm)
8 ft326.7 in50 / 21 in23.53 m101
12 ft524 in50 / 21 in37.27 m162
16 ft627.3 in50 / 21 in47.5 m202

Cut list for a 12 ft wall

Planning cut list
PieceQuantityLength
Frame top and bottom (lower row)1024 in
Frame sides (lower row)1021 in
Frame sides (upper row)1050 in
Frame top and bottom (upper row)1024 in
Chair rail2300 cm lengths

Pre-cut kits for this wall

Pre-cut kits that fit this project. Open a kit for photos, options and pricing.

Half Wall Arched Wainscoting Panels Kit | Pre-Cut MDF Easy Installation01 / KIT

Half Wall Arched Wainscoting Panels Kit | Pre-Cut MDF Easy Installation

From $73.60

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Half Wall Ready to Assemble Factory Primed Wall Covering Half of Wall Kit | Easy Installation W:74mm T:10mm02 / KIT

Half Wall Ready to Assemble Factory Primed Wall Covering Half of Wall Kit | Easy Installation W:74mm T:10mm

From $415.00

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Bedroom Board and Batten Picture Frame Wall Molding Set, Queen & King Size Molding Kit | Easy Installation03 / KIT

Bedroom Board and Batten Picture Frame Wall Molding Set, Queen & King Size Molding Kit | Easy Installation

From $174.41

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Accent Wall Picture Frame Molding Package, Custom Panel Widths | Easy Installation04 / KIT

Accent Wall Picture Frame Molding Package, Custom Panel Widths | Easy Installation

From $53.00

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Box Contemporary Wall Paneling Kit for Living Areas | Pre-Cut & Primed05 / KIT

Box Contemporary Wall Paneling Kit for Living Areas | Pre-Cut & Primed

From $595.00

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Premium Ready-to-Assemble Picture Frame Wall Molding | Easy Installation06 / KIT

Premium Ready-to-Assemble Picture Frame Wall Molding | Easy Installation

From $97.00

View kit

Questions

How much molding do I need for a 12 ft staircase wall with picture frame frames?

About 37.27 m (122 linear ft) including a chair rail and 10% waste, which is 16 sticks of 240 cm. That assumes 5 frames per row, 24 in wide, on an 8 ft ceiling.

Is BM Simply White warm or cool?

BM Simply White has a green undertone and reads as a white white. Its calculated LRV is 92.5, so it reflects a lot of light and keeps molding shadows soft.

Should trim be the same color as BM Simply White walls?

Painting the molding the same color gives a modern, tone-on-tone finish where only shadows show the pattern. White trim adds almost no contrast, so the molding reads through shadow alone (a tone-on-tone look) (1.03:1), and black trim gives 15.3:1.

How high should the chair rail be in a staircase?

About one third of the ceiling height: 32 in on an 8 ft ceiling, 36 in on 9 ft and 40 in on 10 ft. Frames follow the stair angle: keep the bottom rail parallel to the stringer.

Trace the details

Sources & dates

Prices, options and photos come from our product catalog on the date shown. Layout tables are planning estimates; measure your wall before ordering.

  1. Paint color dataset (screen approximations; LRV calculated)Recorded November 11, 2026
  2. DecoMoldings product catalogRecorded November 11, 2026