How to Install a Ceiling Medallion: Upgrade a Light Fixture in 30 Minutes (2026)

Frequently Asked Questions

What size medallion should I buy?

Proportionally: the medallion diameter should be roughly the same as the fixture diameter plus 8–16 inches. For a small flush-mount ceiling light in a 10-foot room: a 12–16-inch medallion. For a chandelier in a dining room with 9-foot ceilings: 18–24 inches. Very large rooms (high ceilings, large fixtures): 24–36 inches. Avoid undersized medallions (look like a collar on a large fixture) or oversized ones (visually dominate the fixture). Hold a tape measure up to the ceiling to visualize the size.

What is the center hole size and how do I cut it?

The center hole must accommodate the fixture canopy (the decorative cover that hides the electrical box). Measure the canopy diameter on your fixture — typically 3.5 to 5 inches. Most medallions arrive solid-center (no hole) or with a small hole that you enlarge. Cut with a jigsaw or oscillating tool. Go slowly — polyurethane cuts cleanly but can crack if the tool vibrates excessively. Use a compass to draw a perfect circle before cutting.

How do I handle a ceiling medallion around an existing fixture?

You have two options: (1) Shut off power, disconnect the fixture from the electrical box, slide the medallion over the wiring, reconnect the fixture. (2) Buy a split medallion (two halves that snap together) designed to install around an existing fixture without disconnecting it. Split medallions are slightly more expensive ($30–$100) but save significant work in rooms where disconnecting the fixture is awkward or requires scaffolding.

My ceiling has a textured finish. How do I get the medallion to sit flat?

Lightly sand the contact area of the ceiling to remove the highest texture points. A flat sanding block works well for this. Then use extra adhesive to fill any low spots between the medallion and the ceiling. The adhesive (PL 200 or Loctite PL400) is thick enough to fill minor gaps. After installation and cure, run a thin bead of paintable flexible caulk around the perimeter where the medallion meets the ceiling — this smooths the transition and hides any small gaps.

Can I install a medallion without nails?

For lightweight polyurethane medallions: adhesive alone is often sufficient — use 6–8 large dabs of construction adhesive and a few strips of painter's tape to hold it while the adhesive cures (24 hours). For medallions heavier than 5 lbs: use finish nails or drywall screws through the medallion face, countersink, and fill holes with spackle before painting. Drive nails into ceiling joists or into the drywall where joists are not accessible (drywall alone holds light medallions adequately).

Installing a ceiling medallion: cut the center hole to match your fixture’s canopy size, apply construction adhesive to the back, position around the fixture (electricity off while working near the box), press firmly against the ceiling, and secure with finish nails driven into the ceiling drywall. Let adhesive cure 24 hours.

A ceiling medallion installs in under an hour and makes a chandelier or fan look significantly more polished.

What you need

• Polyurethane ceiling medallion (primed white is easiest to work with)
• Jigsaw or oscillating tool (to cut center hole)
• Compass or circle template (to mark the hole)
• Construction adhesive (PL 200 or similar)
• Caulk gun
• Finish nails and hammer (optional for heavy medallions)
• Painter’s tape
• Sandpaper (for ceiling texture prep)
• Paintable caulk and a small brush
• Paint (ceiling paint or same as ceiling)

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Step 1: Turn off power

Turn off the circuit breaker for the fixture. Confirm power is off with a non-contact voltage tester.

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Step 2: Measure the canopy

Measure the diameter of the fixture canopy (the part that covers the electrical box). This is the minimum center hole size.

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Step 3: Cut the center hole

Trace the hole on the medallion with a compass. Cut with a jigsaw — go slowly, following the line. Test the fit around the canopy: it should slide over easily with a 1/4-inch gap around the canopy edge.

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Step 4: Paint (if painting before installation)

Prime bare areas on the cut edge with spray primer. Paint the medallion face with ceiling paint or the desired accent color. Painting before installation is easier — painting after requires masking the ceiling and fixture.

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Step 5: Prep the ceiling

Lightly sand the ceiling area where the medallion will sit to flatten texture high points. Wipe clean.

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Step 6: Apply adhesive and mount

Apply construction adhesive to the back of the medallion in 6–8 large dabs, 2–3 inches from the edge and distributed around the center.

Slide the medallion over the fixture wiring and press firmly against the ceiling. Align and press for 30 seconds.

Apply strips of painter’s tape from the medallion face to the ceiling to hold position while adhesive cures (some adhesives are tacky enough without tape).

For heavy medallions: drive 4–6 finish nails through the face into the ceiling drywall at 45-degree angles. Countersink with a nail set.

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Step 7: Fill and paint

After 24-hour cure: remove tape. Fill nail holes with spackle, let dry, sand. Run a thin bead of paintable caulk around the perimeter. Smooth with a damp finger. Paint over caulk when dry.

Reconnect the fixture. Restore power.

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Related guides

• How to Install a Ceiling Fan — upgrade the fixture while you have the medallion out
• How to Install Crown Molding — complement the medallion with wall-ceiling molding
• How to Patch Drywall — patch any ceiling damage before medallion installation
• How to Install a Ceiling Fan With No Existing Wiring — if your medallion location lacks a box