Internal and external corners need compatible joints and a sound adjoining run. Show both sides of the corner in the enquiry. Filling a gap alone may not address a poorly fitted piece, while movement in the surrounding building requires a separate assessment.
Where a local piece is unsuitable for repair, a matching short section may be considered. The scope should identify removal, fitting and joint finishing. It does not imply rebuilding the ceiling edge or replacing hidden framing behind the decorative material.
The remaining cornice and adjacent surfaces must be sound enough for ordinary work. Large loose or heavy sections are outside this minor service. Do not pull at a suspect section for photographs; describe the concern so suitable next steps can be discussed.
Repair suitable minor joints or fit an agreed short compatible cornice section, then prepare the accepted area for decoration. Scope limits: Minor ordinary stable cornice repairs and short matching sections only. No ornate heritage restoration, large loose sections, structural movement diagnosis or hazardous materials.