A red textured terracotta cladding finish is defined by more than a colour name. Clay body, surface treatment, firing range, texture depth, panel orientation, joints, daylight and viewing distance shape the result. A staged sample approval process turns that architectural intent into a benchmark the design team, factory and installer can all use.
Reset the 2014 product record
The archived page named item L3013632 as a 300 × 1200 × 13 mm red panel, but its weight figures referred to 18 and 30 mm products and its technical table identified a 300 × 600 × 18 mm panel. Delivery, certification, test and factory-capacity statements were not linked to current documents for the named item.
Do not transfer those values into a new specification. Request a current profile drawing, finish code, size range, support details and matching test evidence. The archive’s environmental, permanent-colour, self-cleaning, waterproof, seismic, thermal, acoustic and production-superlative claims have been removed; each project requirement needs defined evidence and scope.
Describe red as a controlled visual range
Start with hue and undertone: orange-red, brick red, deep iron red, red-brown or a blended range. Then identify whether colour is produced by the fired body, engobe, glaze or another treatment. Record surface gloss and how cuts, edges and internal cavities should appear. A marketing label such as “natural red” does not communicate these decisions.
Approve multiple current samples that intentionally represent the proposed light, middle and dark limits. Review them beside adjacent metal, glass, mortar, stone or concrete. The acceptable set should allow normal fired variation without accepting an unlimited range. If different elevations need different blending, state it before production and packing. Photograph each sample with scale and orientation, but retain the physical pieces because images cannot resolve surface depth.
Define texture with geometry and direction
Profile
Identify flat, sanded, combed, ribbed, grooved or project-specific relief, including depth, pitch and edge transitions.
Orientation
State horizontal or vertical direction, face up, cut-edge treatment and whether pieces may be reversed.
Local character
Define acceptable tool marks, speckling, pinholes, drag lines or other intentional and non-intentional features.
Repeat
For printed or patterned effects, review repeat frequency and rules that prevent obvious clustering.
Texture affects measured and perceived geometry. Agree the face or datum used for thickness, flatness and joint alignment. ISO 10545-2:2018 provides dimensional and surface-quality methods for ceramic tiles; confirm that its product scope and individual measurements suit the proposed rainscreen panel before citing it as the acceptance route.
Review the finish under facade conditions
Inspect samples vertically, not only flat on a desk. View them in morning, midday and overcast light at close, street and long distances. Deep relief may look calm front-on but create strong banding under raking sun. Test representative joint widths, rail shadows, corner returns, soffits and the contrast between dry and wet appearances.
Use a digital rendering to explore options, but make the physical mock-up the approval benchmark. Cameras, screens and automatic colour correction cannot reliably communicate red saturation, gloss or shadow. Agree the inspection lighting and viewing distance so site decisions do not depend on a single observer standing unusually close.
Use the right tool for colour control
Instrumental colour measurements can support production control when the finish is designed to be uniform. ISO 10545-16:2010 describes a method for small colour differences between plain-coloured ceramic tiles intended to be uniform and consistent. That limited scope should not be imposed uncritically on an intentionally variegated, highly textured or glossy red surface.
For a varied finish, a signed physical range may be more meaningful. If instruments are used, define measurement points, geometry, calibration, surface preparation and how readings relate to visual approval. Separate acceptable hue variation from defects such as cracks, major chips, contamination, excessive distortion or unintended gloss changes.
Connect appearance to exposure and maintenance
Record orientation, rain and runoff, freeze conditions where relevant, airborne salts or industrial deposits, nearby landscaping and access for cleaning. Ask for finish-specific evidence for any colour-stability, chemical, frost or staining requirement. Do not infer “never fades” from the fact that the material is fired, and do not assume one report represents every red body or surface treatment.
Trial the proposed cleaning method on approved samples and the mock-up. Check whether texture retains soil, whether runoff creates streaks, and whether cleaning changes gloss or the range. Define inspection and cleaning responsibilities without promising a self-cleaning facade. Keep labelled spare panels from accepted production for later replacement.
Approve from sample to first production
| Gate | Purpose | Acceptance record |
|---|---|---|
| Loose range | Set colour, texture and edge limits | Labelled and signed samples |
| Full-size panel | Confirm relief, orientation, dimensions and joint reading | Approved product code and drawing |
| Visual mock-up | Review blending, corners, interfaces, light and cleaning | Marked comments and accepted benchmark |
| First production | Compare actual lots before full release | Lot IDs, inspection results and retained pieces |
| Site delivery | Check labels, damage, range and planned distribution | Receiving and segregation log |
Compare current terracotta rainscreen options and use the project gallery to discuss red palette and relief at facade scale.