How to Secure a Loose Cornice on an Antique Bookcase

Many cornices were designed to lift off or attach with screws, blocks and sliding joints. Determine the original arrangement before gluing anything. Photograph mitres and labels, inspect shrinkage gaps and retain keys or blocks. Reglue only failed structural joints within the cornice, then restore its attachment to the case using the historic method. Do not make a removable top permanent, and never lift the bookcase by projecting moulding.

Examine the whole object

Take the furniture out of service and photograph the fault, adjacent joints and previous repairs. Check whether movement elsewhere caused the visible damage.

Prepare carefully

Label removed components and retain original fragments and fixings. Clean only failed adhesive or debris that prevents an accurate fit. Rehearse the repair with padded supports and clamps.

Make the repair

Use compatible materials and introduce as little new wood or adhesive as necessary. Apply pressure gradually, monitor alignment and protect polish, veneer, glass, metal and upholstery.

Preserve evidence

Avoid added screws, expanding glue, thick filler and broad sanding. Tool marks, shrinkage, wear and removable construction can all reveal how the furniture was made and used.

Test and maintain

Allow full cure before loading or moving the object. Check function slowly and stop if a joint opens or binds. Complex breaks, decorated surfaces and rare pieces deserve specialist assessment.