Architectural Millwork
What shop data must be controlled before release to CNC?
Material thickness, grain direction, face orientation, edge-banding allowance, hinge/prep locations, tolerance stack, finished reveal dimensions, and revision control must all be locked before nesting and machining to avoid fit-up failures.
What machine types are most common in architectural millwork?
Most millwork shops use 3-axis CNC routers for sheet goods and profiles, while 5-axis systems are used for complex carved forms, curved surfaces, and difficult access features.
Is architectural millwork the same as cabinetry?
No. Cabinetry is a subset of millwork; architectural millwork also includes larger building-integrated components such as wall systems, trim packages, columns, arches, and branded interior features.
Architectural millwork is the custom fabrication of building-integrated interior and exterior components—wall panels, trim, moldings, doors, cabinetry, columns, arches, casework, and built-ins—produced to fit a specific design rather than stock sizes. In CNC practice, it involves computer-driven machining of wood, MDF, plywood, laminates, and metals into repeatable, installation-ready parts.
On the shop floor, architectural millwork begins with drawings, elevations, or 3D models translated into CNC toolpaths and setup sheets. A typical run may involve wall panels, curved trim, or door packages machined from sheet goods on a 3-axis router, with 5-axis work reserved for carved forms and complex access features. Material selection, cut optimization, labeling, inspection, and staged delivery are coordinated so parts arrive ready for assembly. DfMA principles matter: datums, hole locations, edge conditions, reveal lines, and finish allowances must be locked before nesting. Common tolerances for wood and veneered panels run ±0.25–0.50 mm, plastics ±0.10–0.25 mm, and metal plate features ±0.05–0.20 mm when fixturing is proper. CNC output is still hand-finished on visible faces because architectural parts must marry geometric accuracy with surface quality. Repeatability and scrap reduction are the bottom line, allowing multiple identical units to match across large projects.
Datum mismatch at install: Site measurements or CAD datums that don't match shop machining datums throw wall panels and casework off-center, leaving uneven reveals, crushed joints, or impossible scribe gaps at ceilings and walls.
Material movement after machining: Wood, MDF, and veneered panels swell, cup, or shift when humidity control or acclimation is poor, so parts fit on the table but bind, open seams, or lose flushness after delivery.
Toolpath and finish mismatch on visible faces: Aggressive feeds, poor cutter selection, or insufficient sanding/edgebanding allowance leaves tear-out, chatter, blowout, or witness marks on decorative moldings and custom feature walls.