How to Create a Vibrant Shim Mosaic for Your Walls

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Instead of blending shims into rustic neutrals, you’ll be playing with bold blocks of color to create an art piece that’s cheerful yet balanced.

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The design lets you experiment freely, paint shims in your chosen palette, arrange them like a puzzle, and suddenly your wall has a one-of-a-kind installation that feels handcrafted yet stylish enough to hang anywhere.

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Materials Needed

  • 60-70 wood shims (6"-8")
  • 1 plywood backing board (approx. 20"Γ—30")
  • Assorted acrylic paints (green, teal, yellow, gray, navy, white, or your custom palette)
  • Wood stain (optional)
  • Paintbrushes (fine and flat)
  • Wood glue
  • Sandpaper (120 grit)
  • Trim pieces (optional)
  • Picture hangers or sawtooth hangers
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Step-by-step Guide

Step 1: Sand your shims lightly so paint adheres smoothly. Decide on your palette, you can use three to five colors for balance.

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Step 2: Paint groups of shims in different shades, leaving a few natural or stained for warmth. Let them dry completely.

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Step 3: Lay out your backing board and begin arranging the shims vertically. Now, mix up the colors so they feel random but harmonious. Step back often to see the balance.

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Step 4: Once satisfied with the layout, glue each shim onto the board carefully, pressing firmly as you go.

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Step 5: Trim the edges with a wooden frame if desired, then attach hanging hardware.

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Tip: When painting, I like to layer a thin wash of stain over bold colors, it softens them slightly and gives the piece depth, so the finished panel feels both modern and organic.

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