How do you keep a moulded ceiling during a renovation?
A moulded ceiling is kept by not cutting it: wiring, air conditioning and light are routed elsewhere. For that, the services plan is drawn before strip-out, not after. The moulding is inspected, photographed, the condition of its backing is assessed, and it is protected while work goes on.
The typical ceiling in an old Barcelona flat is plaster on reed or timber lath hung from the beams. It is fragile: the vibration of a hammer drill in the next room shakes plaster loose, and one extra chase for a cable ruins the layer. So the job begins with reinforcement, not demolition: check how the ceiling is fixed above, and only then decide where work can go.
Can you add air conditioning without touching the mouldings?
Yes. Ducted air conditioning is hidden in the false ceiling of a corridor, bathroom or dressing room, and air reaches the room through linear grilles in the wall or in a recess over the door. The moulded ceiling stays untouched. Another ductless option is a floor or wall unit in a niche concealed by furniture.
Refrigerant and condensate lines go through the floor, walls and service shafts, not the ceiling. Grilles are chosen in the wall colour or built into panelling and skirting. A classic split above the window spoils the facade and the wall, and in luxury flats it is avoided. If the facade is protected, the outdoor unit is a separate question, which we cover in the article on cooling without an outdoor unit.
Plaster or polyurethane mouldings?
For historic rooms, plaster. It does not burn, behaves like the original, paints the same way and can be restored in place. Polyurethane is light, cheaper, glues faster and suits an imitation in a new part of the flat or a long cornice without joints, but it is combustible, holds a sharp arris less well and yellows under paint with time.
The difference shows up close. A plaster profile is crisper, with fine lines and shadow, while polyurethane is softer. If the neighbouring room keeps the original, the copy is made in plaster with the same mix as the house. For a corridor or dressing room with no original, polyurethane is acceptable. Do not mix materials in one room: they react differently to humidity and paint, and the joint shows.
How do you repair a broken piece of moulding?
A silicone mould is taken from the original, the missing piece is cast in plaster from it and fixed with plaster paste. A long cornice profile is run in place with a profile template from a sample. For that the plasterer first strips the paint layers, sometimes dozens, and finds the real shape.
Paint is removed gently: with steam, gel strippers or by hand. Sandblasting ruins the sharp edges. Cracks are filled with plaster, not sealant, and sanded to the form. The ceiling rose from which a chandelier is taken down is cleaned and checked for how it is fixed: a rose does not carry the weight of a fitting, which is anchored to the beam or the slab, not to the moulding.
Where do you put spotlights on a moulded ceiling?
Not in the moulding and not on the cornice. The light is built in three layers: hidden lighting behind the cornice, wall lights and floor lamps, and accent light on pictures and relief surfaces. Recessed spots in a moulded plaster plane fit only in zones without ornament, and even then with care for the backing.
Lighting behind the cornice: an LED strip goes on the top face of the profile, and the light slides across the ceiling and picks out the relief. The strip is not seen, and the cornice seems to float. For task light use wall lights, table lamps and wall-mounted track. The central fitting stays the star on the rose. With a dimmer and scenes, this scheme gives living light, not a uniform operating theatre. We have a separate article on lighting scenarios.
How do you run wiring without damaging the ceiling?
Electrics go through the floor, walls and skirtings, and rise to the ceiling only where there is no ornament, for example beside the wall, in a niche or behind the cornice. For new lines, use concealed channels in the wall, not chases in the ceiling. Switches and sensors move to the wall.
If the ceiling must be opened for a beam or a pipe, it is done from below with a margin and the plaster is made good afterwards. A cut through ornament follows the joint between elements and does not cross it. Before starting, the moulding is reinforced and covered with plastic against dust. The restorer comes before the electricians, not after: cheaper than correcting a mistake.
How does BCN YARD work with moulded ceilings?
We document the state of the ceiling before work, plan the services so the moulding stays intact and bring in restorers when a fragment has to be replaced. We run the project in Russian and Spanish, with one person responsible. Send photos of the ceiling and the room plan and we answer within an hour.
Frequently asked questions
Can you add air conditioning without touching the mouldings?
Yes. Ducted air is hidden in the false ceiling of the corridor, bathroom or dressing room and reaches the room through linear grilles in the wall or over the door. Refrigerant and condensate lines go through the floor and shafts, not the ceiling. The moulded ceiling stays intact.
Plaster or polyurethane mouldings?
For historic rooms, plaster: it does not burn, behaves like the original and can be restored in place. Polyurethane is lighter and cheaper, suits new zones and long joint-free cornices, but is combustible, holds a sharp edge less well and yellows under paint. Do not mix them in one room.
How do you repair a broken piece of moulding?
Take a silicone mould from the original, cast the piece in plaster and fix it with plaster paste. A long cornice is run in place with a template. First strip the paint gently with steam or gels, no sandblasting. Fill cracks with plaster, not sealant.
Where do you put spotlights on a moulded ceiling?
Not in the moulding. Use hidden lighting behind the cornice, wall lights and floor lamps, and accent light on pictures. Recessed spots fit only in zones without ornament. An LED strip on the top face of the profile picks out the relief and stays out of sight. Anchor the chandelier to the beam, not to the rose.