The terracotta panel production process turns a project brief into a controlled fired-clay component. Raw-material preparation, extrusion, drying, firing, finishing and inspection are connected stages: a change in one can affect geometry, colour, strength, fixing compatibility or yield. Specifiers should therefore review the manufacturing route together with samples, drawings and current evidence.
Begin with an exact product definition
Before discussing production, identify the current product code, section, face dimensions, thickness, internal webs, fixing grooves, orientation, finish and intended support. Add project quantities, special shapes, cut units, acceptable tolerances and design criteria. A process review without this identity can drift toward a broadly similar panel that does not match the tender proposal.
Request the latest drawing revision and link it to the quotation, sample labels and evidence register. Confirm which features are formed in the die and which are created later by cutting, machining or surface treatment. If a custom profile is needed, establish tooling, trial and approval stages before the programme is fixed.
Control clay-body preparation
Manufacturers develop a body formulation and preparation route suited to their equipment and product. The project team does not need a proprietary recipe, but it should understand how incoming materials are identified, stored, blended and checked. Moisture, particle distribution and contamination controls can influence extrusion and firing consistency.
Ask how batches are defined and traced, which checks are recorded, and how a material change is approved. Where recycled or recovered content, responsible sourcing or another environmental attribute is claimed, request a current definition, scope, calculation method and supporting documentation. A natural-clay description alone does not verify a project sustainability outcome.
Coordinate extrusion, cutting and drying
Extrusion forms the panel section and its fixing geometry. Die condition, body consistency and process settings require monitoring so dimensions and internal webs remain within the approved range. Green units are then cut and handled before drying. Supports and handling should limit avoidable distortion or edge damage while the clay remains vulnerable.
Drying removes moisture before firing according to the manufacturer’s controlled route. The relevant question is not whether one generic temperature sounds correct, but whether the current process is established for the exact section and size. Ask which measurements, visual checks and hold points release units to the kiln.
Manage firing and appearance variation
Firing develops the final ceramic body and contributes to colour and geometry. The appropriate cycle depends on formulation, profile, finish, kiln and production controls; do not copy the archived 1,200°C figure into a project specification. Request current process-control and inspection information without prescribing a proprietary kiln schedule.
Natural body colour, engobe, glaze and textured treatments can each produce a different approval challenge. Agree colour direction, gloss, texture and an acceptable range using several current pieces. Move to full panels and a multi-unit mock-up under relevant light. Retain labelled light, middle and dark control samples for production and site comparison.
Finish, measure and inspect the fired panels
Geometry
Check length, height, thickness, squareness, bow, twist, edge condition and fixing features using agreed methods.
Appearance
Compare colour, texture, gloss, glaze coverage and visible defects with the approved range under defined lighting.
Mechanical work
Control cutting, drilling or machining limits and inspect exposed edges or features that interact with clips and joints.
Traceability
Connect product, drawing, die, finish, batch, inspection result, crate and elevation zone through durable records.
Define sampling frequency, acceptance authority and nonconformance handling before production. A pass/fail label should refer to written criteria. The terracotta product submittal checklist can help align drawings, samples, reports and quality records.
Verify claimed advantages with current evidence
Low mass, replacement access, colour stability, water absorption, freeze–thaw behaviour, impact resistance, fire classification, acoustic response, thermal properties and cleaning performance are distinct questions. Some concern the panel; others depend on the fixing system or whole wall. Map every project requirement to a current report, calculation, sample, mock-up or maintenance trial for the proposed configuration.
Check specimen identity, dimensions, finish, support, method, date and scope. A result from another profile or thickness needs a documented technical basis. Do not convert marketing language such as “never fade,” “easy to install” or “low support cost” into a specification requirement without measurable criteria and a project comparison.
Release production with system and site controls
Coordinate clips, rails, brackets, anchors, cavity, insulation, membranes, fire barriers, flashings and substrate tolerances before panel release. The facade engineer should address project actions, movement and interfaces. Review the rainscreen system overview and installation workflow as starting points, subject to final project engineering.
Establish a feedback route between factory and site. Early installation observations about joints, clip engagement, edge condition or packing should be recorded against batch and drawing references. Corrective action can then target the relevant process without silently changing approved appearance or geometry.
The release package should include approved drawings and samples, evidence, inspection plan, production schedule, quantities, spares, packing and delivery sequence. At handover, retain batch records, inspection reports, cleaning trials and replacement instructions. Change control should cover body, die, firing route, finish and fixing hardware throughout manufacture.