How to Respond to Mould on Antique Furniture

Mould indicates excess moisture and may affect wood, upholstery, leather, paper labels and finishes differently. Isolate the object from the collection without wrapping it in plastic, protect people with appropriate precautions, and locate the moisture source. Dry the room gradually with airflow that does not spread spores. Do not brush active mould indoors or apply bleach, vinegar or household disinfectant. Once dry, a conservator can assess safe surface cleaning and whether porous upholstery or backing needs specialist treatment.

Assess and document

Work in good light and photograph the whole object and close details. Identify every material present, including coatings, textile, metal, stone, labels and previous repairs. Test nothing on a conspicuous area.

Begin with prevention

Correct moisture, heat, light, load, dust or pest conditions before cleaning. Stable surroundings and careful handling usually provide greater long-term benefit than applying products.

Clean only when justified

Start with the least invasive dry method and stop if colour, fibres, coating or particles detach. Liquids and solvents require knowledge of the original material and later surface layers.

Products to avoid

Do not assume household cleaners, oils, polish, bleach, disinfectant or steam are safe for antiques. They can stain, dissolve coatings, drive dirt inward or leave residues that complicate future care.

Monitor and seek help

Record actions and review condition periodically. Active mould, contaminated flood water, fragile upholstery, lifting decoration or valuable provenance calls for a trained conservator.