In most period London rooms the finest craftsmanship is overhead: running cornices, ceiling roses, corbels and mouldings cast or run in lime plaster a century or more ago. They survive neglect surprisingly well. What blunts them is care of the wrong kind — coat after coat of thick paint until the detail drowns. Keeping plasterwork crisp is mostly a matter of restraint.
The enemy is thickness
Every careless repaint softens a cornice a little more. Thick emulsion pools in the hollows, rounds the arrises and slowly turns sharp ornament into suggestion. The remedy is patience: loose and failing layers — often old distemper — are washed and taken back rather than sealed in, and new paint goes on in the thinnest workable coats, brushed into the detail rather than rollered over it. Done properly, a repainted cornice looks carved again rather than iced.
Repairs that move with the building
London houses move with the seasons, and rigid modern fillers dragged across old plaster crack along the same lines within a year. Cracks are raked out and filled with materials compatible with lime backgrounds; sections of run moulding that have been lost or clumsily patched can be run again in place to match the original profile — slower than gluing on a moulded lookalike, and worth every day of the difference. Where ceilings have been overboarded or roses removed in previous decades, reinstatement is usually possible and transforms the room.
When to conserve rather than redecorate
Sometimes the right decision is to leave well alone: stabilise, clean and protect an original surface rather than repaint it. In listed interiors that instinct is often a legal requirement as well as good taste, and it belongs in the conversation at survey stage — recorded in the written specification alongside everything that will be painted. Our heritage and period property service covers the approach, our notes on conservation areas cover the wider rules, and the complete guide places plasterwork in the whole programme.
Living with plasterwork
Between decorations, plasterwork asks little: dust removed gently with a soft brush rather than wiped, water staining investigated at its source before it is painted over, and hairline cracks watched rather than feared — most are seasonal movement, but a crack that widens is the building asking for attention. Report changes early. Ornament that has stood for a century rarely fails suddenly; it gives notice, and acting on the notice is always cheaper than acting on the failure.
Common questions
Our cornice detail looks soft — can it be recovered?
Very often, yes. Careful removal of built-up layers brings profiles back to a surprising degree, and lost sections can be re-run to match. A survey tells us how far recovery can go before we specify anything.
Can you match an existing cornice in one room for another?
Profiles can usually be taken from surviving work and run to match — a conversation for the survey, and one more reason the specification is written before work begins.
This piece is part of our complete guide to decorating a period London home.
Start a project with a free, no-obligation consultation — we reply within one working day.