A pilaster is a flat column-like element applied to the wall on each side of a door, designed to add a substantial vertical element to the entryway. The pilaster is a traditional architectural element, used in formal traditional interiors to add weight and presence to the door.
A PU pilaster for a door consists of three parts: the base (at the bottom), the shaft (the vertical body), and the capital (at the top). The three parts are factory-made from the same material and finish, designed to be installed as a unit on each side of the door.
The base is typically a square or rectangular block, 100 to 200 millimeters tall, with a simple or developed profile. The shaft is a flat or slightly projecting vertical element, 1.8 to 2.4 meters tall, with a flat face or a fluted face. The capital is a developed element at the top, with a classical profile (a small cyma, a small fillet, a small decorative band).
The most common pilaster for a door is a plain pilaster. A flat face, a simple base, and a simple capital. The pilaster is the most restrained classical option, suitable for transitional interiors.
A second common pilaster is a fluted pilaster. A face with vertical channels (flutes) typically 10 to 20 millimeters wide, separated by flat fillets. The fluting adds a classical detail to the shaft, and the pilaster reads as more developed.
A third common pilaster is a paneled pilaster. A face with a raised or recessed panel, typically 50 to 100 millimeters wide. The paneling adds a classical detail to the shaft, and the pilaster reads as more substantial.
A fourth common pilaster is a reeded pilaster. A face with small convex vertical elements (reeds), typically 5 to 10 millimeters wide. The reeding is a smaller-scale classical detail than fluting, and the pilaster reads as refined.
For sourcing, PU door pilasters are a stock product at most factories that produce classical trim. The pilasters are available in a range of standard designs (plain, fluted, paneled, reeded) and standard sizes, with quick lead times and competitive pricing. Custom designs are available on longer lead times.
A practical install note: the pilaster is installed on the wall, plumb and square, on each side of the door. The base is installed first, the shaft is installed second (aligned to the base), and the capital is installed third (aligned to the top of the shaft). The pilaster is glued to the wall with construction adhesive and secured with screws into the wall studs or blocking. The joints are filled with paintable caulk, and the painter's topcoat goes on the next day.
A practical note on the right pilaster for the right room. The pilaster's design should be coordinated with the room's other architectural elements. A fluted pilaster in a modern minimalist room reads as out of place; a plain pilaster in a Federal room reads as understated. The selection should be deliberate, and the pilaster should be part of the room's overall composition.
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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.