Gap between crown molding and ceiling

Symptoms

• Visible gap between the top edge of crown molding and the ceiling
• Gap varies in size along the run of molding
• Small cracks in caulk previously used to fill the gap

Likely causes

• CommonCeiling or wall not perfectly flatOlder or settled homes rarely have perfectly straight ceiling lines, leaving gaps in spots.
• CommonMolding not fully secured into framingIf the crown wasn't nailed into solid backing, it can pull slightly away over time.
• PossibleHouse settling shifting the ceiling lineGradual structural movement can open gaps that weren't there originally.

What to do

1. Check if the molding itself is loose by pressing gently at the gap.
2. If loose, re-nail the molding into the ceiling joist or wall stud behind it.
3. For stable gaps, apply painter's tape along both edges for a clean line.
4. Fill the gap with paintable caulk, using a flexible caulk for larger gaps.
5. Smooth with a wet finger or caulk tool before it skins over.
6. Remove tape while caulk is still workable.
7. Let cure fully, then touch up paint to match.

Tools and parts

• Caulk gun
• Hammer or nail gun (if re-securing)
• Painter's tape

When to call a pro

Call a trim carpenter if gaps are large and consistent along the whole run, which may mean the molding needs to be reinstalled.

Safety