inspiration · Arched
Farmhouse Arched Wall Molding
Farmhouse Arched Wall Molding: wall elevation, living room layout for 12, 15, 18 ft walls, cut list, calculator and pre-cut kits.
Project calculator
Overview
Upper frames finish in a half-round arch instead of a flat top. The curve softens a headboard or reading-nook wall. Farmhouse rooms (farmhouse and rustic) typically use board and batten, picture frame layouts: Board and batten or simple frames in warm whites, sage and muted greens.
Arched layout on a 15 ft living room wall
Molding over the full wall height, upper and lower rows divided by a chair rail. On a 15 ft wall with an 8 ft ceiling this gives 5 frames per row, each 31.2 in wide, with 50 in upper and 21 in lower frames. The layout uses about 40.43 m of 2.5 cm molding, or 17 sticks of 240 cm, including 10% waste. Center the layout on the sofa or TV rather than the wall when furniture is off-center.
Building the arched pattern
Arched tops are pre-formed in MDF; the straight sides and the bottom rail are cut to the same width as the arch. Fix the arch first, then hang the sides from it.
Farmhouse look
Board and batten or simple frames in warm whites, sage and muted greens. Recommended layouts: board and batten, picture frame.
Wall elevation
Living Room wall sizes: arched accent wall layout
| Wall width | Frames per row | Frame width | Frame height (upper / lower) | Molding incl. 10% waste | 240 cm sticks | Chair rail pieces (300 cm) |
|---|---|---|---|---|---|---|
| 12 ft | 4 | 31 in | 50 / 21 in | 32.26 m | 14 | 2 |
| 15 ft | 5 | 31.2 in | 50 / 21 in | 40.43 m | 17 | 2 |
| 18 ft | 6 | 31.3 in | 50 / 21 in | 48.6 m | 21 | 2 |
Cut list for a 15 ft wall
| Piece | Quantity | Length |
|---|---|---|
| Frame top and bottom (lower row) | 10 | 31.2 in |
| Frame sides (lower row) | 10 | 21 in |
| Arch frame sides (upper row) | 10 | 34.4 in |
| Arch top + bottom rail (upper row) | 5 | 31.2 in span |
| Chair rail | 2 | 300 cm lengths |
Pre-cut kits for this wall
Pre-cut kits that fit this project. Open a kit for photos, options and pricing.
01 / KITArched Accent Wall Trim Molding Kit, 3 Widths | Pre-Cut MDF
From $58.40
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02 / KITFlexible Arched Wall Molding, Paintable MDF Wall Trim, Pre-Cut Arch Decorative Wall Panels | Picture Frame Molding, Accent Wall Trim
From $73.60
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03 / KITArch Molding Kit, 3 Widths | Flexible Pre-Cut MDF Arch Trim for Accent Walls
From $58.40
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04 / KITArched Decorative Wall Molding Panels, 1 to 5 Arches | Pre-Cut MDF
From $146.40
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05 / KITFlexible Arch Trim Wall Molding Kit | Pre-Cut MDF Decorative Wall Panels
From $83.40
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06 / KITDouble Arched Wall Molding Set | Pre-Cut MDF Decorative Wall Panels
From $133.60
View kitQuestions
How much molding do I need for a 15 ft living room wall with arched frames?
About 40.43 m (133 linear ft) including a chair rail and 10% waste, which is 17 sticks of 240 cm. That assumes 5 frames per row, 31.2 in wide, on an 8 ft ceiling.
How high should the chair rail be in a living room?
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. Center the layout on the sofa or TV rather than the wall when furniture is off-center.
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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.
- Paint color dataset (screen approximations; LRV calculated)Recorded November 11, 2026
- DecoMoldings product catalogRecorded November 11, 2026