A wall pilaster is a flat-backed column applied to a wall, with half of the column's profile projecting from the wall. The pilaster creates depth on the wall (the projection is the depth) and adds classical beauty through the capital, the base, and the shaft's profile.
The most common wall pilaster application is a series of pilasters on a long wall, creating a colonnade effect. The pilasters are positioned at regular intervals (typically 1.5 to 3 meters apart), with the capitals aligned to a common height. The wall reads as a series of bays, each defined by the pilasters.
A second common application is a pair of pilasters framing a focal point. The pilasters are positioned on each side of the focal point (a fireplace, a console, a TV, a piece of art), with the focal point centered between them. The pilasters define the focal area and add a classical element to the wall.
A third common application is a single pilaster at a transition point. The pilaster is positioned at the corner of a room, at the intersection of two walls, or at a change in the wall plane. The pilaster marks the transition and adds a classical element to the corner.
A fourth common application is a pilaster integrated with a wainscot or a panel layout. The pilaster terminates the wainscot or the panel layout at one or both ends, with the capital and base defining the termination. The pilaster becomes part of the wainscoting scheme.
For sourcing, wall pilasters are a stock product at most factories. The factory offers a range of standard pilaster designs (plain, fluted, reeded, paneled, classical orders) and standard sizes, with quick lead times and competitive pricing. Custom designs are available on longer lead times.
A practical install note: a wall pilaster is installed by gluing it to the wall with construction adhesive and securing it with screws into the wall studs. The pilaster should be plumb and square, with the joints at the top and bottom filled with paintable caulk. The painter's topcoat goes on the next day.
A practical note on the depth. The pilaster's projection from the wall is the depth that the pilaster adds to the wall. A pilaster with a 50 millimeter projection adds a small shadow line; a pilaster with a 100 millimeter projection adds a more substantial shadow line; a pilaster with a 150+ millimeter projection adds a major shadow line. The projection should be proportional to the room — a small room with a heavily projecting pilaster looks crowded, a large room with a small projection looks under-scaled.
---
Frequently Asked Questions
Q: What are PU columns?
A: PU columns are polyurethane molded columns — typically Tuscan, Doric, Ionic, or Corinthian — that replicate carved stone or wood at a fraction of the weight. They ship in two or three halves for assembly around an internal structural post or as a hollow decorative shell.
Q: Are PU columns load-bearing?
A: Standard decorative PU columns are not structural on their own. They are designed as a 2- or 3-piece shell that wraps an internal load-bearing post (steel, wood, or reinforced concrete). For structural applications, specify "structural PU columns" with an internal steel core — these are engineered and tested to published load ratings.
Q: How tall should decorative columns be?
A: For a standard 8 ft (2.4 m) ceiling, use a 96-inch (2.4 m) column shaft plus capital and base, totaling about 100–104 inches overall. For 10 ft (3 m) ceilings, use a 120-inch shaft. Custom heights are available up to 20 ft (6 m) for atrium and lobby installations.
Q: How do you install Wall pilasters?
A: Mount the base plate to the floor with anchor bolts. If structural, set a steel post first; if decorative, mount an internal PVC pipe for rigidity. Assemble the two or three PU column halves around the post, glue the seams with PU adhesive, and clamp for 30 minutes. Mount the capital and base with construction adhesive. Fill and sand the vertical seam, then paint.