A ceiling dome is a shallow dome built into a ceiling, with a cove or curved profile from the ceiling plane to the center. A PU ceiling dome is a factory-made assembly, designed to be installed as a single element (or a few elements) on a flat ceiling, with the dome rising from the ceiling plane to the center.
The most common ceiling dome application is a grand entryway or a formal living room. The dome is sized to the room (typically 1 to 2 meters in diameter), with a chandelier or pendant hanging from the center. The dome adds depth to the ceiling and a focal point to the room.
A second common application is a dining room. The dome is centered on the dining table, with a chandelier hanging at the right height above the table. The dome defines the dining area and adds a focal point to the room.
A third common application is a master bedroom. A smaller dome (1 to 1.5 meters) centered on the bed, with a small chandelier or pendant hanging from the center. The dome adds a focal point to the bedroom ceiling.
A fourth common application is a hotel lobby or a grand commercial space. A larger dome (1.5 to 3 meters) in the lobby, with a substantial chandelier hanging from the center. The dome adds a grand architectural element to the commercial space.
For sourcing, PU ceiling domes are a stock product at most factories. The factory offers a range of standard dome sizes (1 to 2 meters) and profiles (cove, stepped, layered). Custom sizes and profiles are available on longer lead times.
A practical install note: a PU ceiling dome is installed by securing it to the ceiling joists with screws and construction adhesive. The dome is heavier than a medallion (a 1.5 meter dome can weigh 15 to 30 kilograms), and the install requires a helper. The ceiling should be checked for adequate structure, with the dome attached to joists or to blocking between joists.
A practical note on the wiring. The chandelier or pendant wiring should be run before the dome is installed, with the wiring passing through a hole in the center of the dome. The dome is installed around the wiring, and the chandelier is hung after the dome is in place. The wiring should be supported by a ceiling box rated for the chandelier's weight.
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Frequently Asked Questions
Q: What is polyurethane (PU) decorative material?
A: Polyurethane (PU) decorative material is a high-density closed-cell polymer molded into architectural profiles such as cornices, ceiling medallions, wall panels, columns, and skirting boards. It replicates the appearance of plaster, carved wood, or stone at one-quarter the weight, is fully waterproof, impact-resistant, and arrives factory-primed for paint.
Q: How does PU compare with plaster and wood mouldings?
A: PU is lighter than plaster (no scaffolding required), impact-resistant during transport, and immune to cracking. Compared with wood, PU does not warp, split, or attract termites, and it tolerates moisture in bathrooms and kitchens. The trade-off: PU cannot be refinished the way solid wood can, but its lifespan is 20–30+ years with minimal maintenance.
Q: How do you cut and finish PU mouldings?
A: Cut PU mouldings with a fine-tooth miter saw (40+ teeth for a 10-inch blade) to avoid chipping the molded edge. Sand the cut edge with 220-grit, then apply two coats of interior latex paint. Mitre joints at corners, fill seams with lightweight spackle, sand smooth, and finish with one final top coat.
Q: Is PU moulding safe for indoor air quality?
A: Yes. Premium PU mouldings are manufactured without formaldehyde, asbestos, or VOCs. They meet EN 13501-1 Class E fire classification as a minimum, with Class B fire-retardant versions available for commercial projects. The factory-applied water-based primer further reduces off-gassing once installed.