Terracotta panel purchasing should convert architectural intent and wall-system requirements into a comparable, traceable order. Surface inspection matters, but a buyer also needs exact product identity, current evidence, coordinated supports, approved samples, manufacturing controls, commercial scope and a realistic delivery plan.
Issue a project-specific purchasing brief
Provide location, building use and height, elevations, facade area, substrate, exposure and programme. Include the intended panel module, orientation, finish, joints, corners, soffits and special pieces. State design actions, authority requirements, evidence needs, samples and mock-up stages. This creates one basis for supplier comparison.
Establish evaluation weights and approval roles before tender. Architectural fit, evidence quality, interface risk, manufacturing controls, schedule, service and commercial scope should be scored separately. Record required information and due dates so an incomplete offer is visible rather than silently treated as compliant.
Name the exact product family and installation concept. A mechanically fixed rainscreen panel, adhered tile and mechanically retained tile are different purchases. Record which party designs and supplies clips, rails, brackets, anchors, cavity components and interfaces before requesting a price.
Verify product identity and geometry
Request current product code, section, face dimensions, actual thickness, internal geometry, unit mass, fixing grooves, orientation, tolerances, cut limits and special shapes. Confirm whether the item is standard, modified or custom. Tie the drawing revision to the quotation, samples, calculations and test reports.
Replace “flatness” as a casual visual judgement with defined checks for bow, twist, squareness, dimensions and edge condition using agreed methods. Acceptance limits must come from project documents and current manufacturer information. Inspecting one attractive unit cannot establish production consistency.
Approve appearance as a range
Fired-clay colour and texture may vary, so the goal is not automatically “no colour difference.” Define the desired direction, gloss, texture, variation, joint and layout. Review several current pieces under relevant light, then full panels and a multi-unit mock-up with corners and adjacent materials.
For glaze or another surface treatment, agree coverage, gloss, texture, edge character and permitted visual conditions. Retain labelled light, middle and dark control samples. Record blending or layout rules and inspection lighting. A particle or tonal shift is not acceptable or defective until measured against written criteria.
Build an exact-product evidence matrix
Product evidence
Map dimensions, absorption, strength, freeze–thaw exposure, impact, finish and fire classification where required.
Assembly evidence
Address supports, anchors, structural calculations, water management, fire barriers and other complete-wall criteria.
Document identity
Check method, edition, date, specimen, dimensions, finish, support, issuer and scope for every submission.
Deviation control
Record gaps and require a technical basis before evidence for another profile or system is accepted.
A broken edge is not a substitute for a defined material test. Likewise, a certificate logo is not enough without scope. Use the terracotta submittal checklist to organize review.
Review supplier and manufacturing controls
Confirm the contracting entity, manufacturing site and responsible technical contacts. Request current procedures for body preparation, forming, drying, firing, finishing, dimensional inspection, visual sorting, traceability and nonconformance. Ask how approved samples and drawings control production.
Set change-notification requirements for clay body, die, dimensions, finish route, hardware and production site. Each proposal should identify affected drawings, samples, calculations, reports, cost and programme. A substitute cannot be accepted merely because its name or visible face appears similar.
For custom dies or finishes, define trials, measurement methods, approval ownership and design-freeze dates. Capacity and lead time should reflect quantities, batches, tooling, inspections, packing and other commitments. Brand recognition cannot replace a project production and quality plan.
Compare system scope and installed value
Normalize offers for panels, specials, clips, rails, brackets, anchors, engineering, tests, samples, mock-ups, tooling, spares, packing, freight and site support. Identify assumptions, exclusions, quotation validity and supply boundaries. A low panel rate is not the installed-wall cost.
Coordinate substrate tolerances, drainage, ventilation, insulation, membranes, fire barriers, windows and movement. Assign calculations, shop drawings, interface review, installation method and inspections. Review the rainscreen system as a starting point, subject to project engineering.
Release, inspect and hand over the order
Before release, align the product schedule, drawings, samples, evidence, responsibility matrix, quantities, spares and programme. Set factory and site inspection points, sampling, records and nonconformance response. Link batches and crates to installation zones.
Plan crate dimensions and weights, delivery sequence, transport documents, site access, lifting, protected storage and replacement of transit damage. Schedule approvals, trials, production, inspections and corrective work with realistic allowances. Delivery readiness includes documentation and traceability, not only finished units at the factory.
At handover, provide final drawings, reports, calculations, batch and inspection records, cleaning trials, maintenance guidance and replacement method. Keep labelled spares in suitable storage. These controls turn purchasing into a documented quality process rather than a four-point visual test.
Retain the bid comparison and decision register with the final contract file so later substitutions and claims can be checked against the accepted basis.