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.
Identify the full affected length and adjoining sound sections. A short compatible replacement can be different from renewing an entire room. Availability of a matching profile affects the options, so confirm the proposed material before removing the original cornice.
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.
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.