“Clay brick tile vs ceramic tile” is a useful search question, but the wording is not a universal technical classification. Trade names can describe a raw material, firing tradition, appearance, shape, thickness, intended use or product family. They do not, by themselves, identify the governing standard or prove suitability for a project.
A defensible comparison starts with the exact product, where and how it will be used, the applicable standard and edition, and test evidence tied to the supplied item. Water absorption may be one declared result within that process; it is not a universal shortcut that replaces the rest of the specification.
Start with the project role, not the product nickname
The first selection question is not “Which one sounds more ceramic?” It is “What must this unit do in this assembly and exposure?” An adhered wall veneer, a mechanically fixed ventilated facade unit, a pedestrian paver and an interior floor tile may all be fired-clay products, yet their geometry, interfaces, loads and required evidence are different.
Define use and exposure
Record interior or exterior use, wall or floor position, adhered or mechanically fixed construction, pedestrian or vehicle loading, height, climate, wetting, chemicals, impact and maintenance conditions.
Identify the supplied product
Record manufacturer, factory, item or model, declared product type, body and finish, face dimensions, thickness, profile, edge and back geometry, colour reference and intended use.
Name the governing document
State the product standard or approval, jurisdiction and exact edition. Confirm that its scope covers the supplied unit and intended application instead of choosing a standard from a similar-sounding trade name.
Match reports to the item
Check laboratory, report number and date, sample identity, method and edition, conditioning, specimen count, orientation, units, individual results and reported statistical basis.
Check the complete assembly
Unit data does not prove adhesive, mortar, anchors, clips, rails, cavity, substrate, joints, movement provisions, waterproofing, insulation or fire-stopping performance as a system.
Approve the production reference
Use current samples, an agreed colour and texture range, a project mock-up, inspection criteria, traceable batches and a documented process for substitutions and nonconforming units.
Treat water absorption as a test result, not a product passport
A water-absorption value is meaningful only with its test method, specimen preparation and identity, units and result basis. A threshold may classify products or set requirements inside a named standard, but the number should not be detached from that document and applied to every product sold under a similar English label.
This guide therefore does not repeat the old page’s percentage ladder. That 2021 text named no governing standard, method or edition and mixed commercial terms whose technical meanings vary. It also treated one property as a complete distinction between broad product families. A current submittal should instead reproduce the manufacturer’s declared classification exactly and attach the relevant report.
| Decision | Evidence to request | Review boundary |
|---|---|---|
| Identity and scope | Data sheet, item/model, factory, declared type, intended use, governing standard or approval and edition | Confirms that the words in the specification and report refer to the proposed product |
| Geometry | Face size, thickness, profile, tolerances, edge/back form, unit mass and special-piece drawings | Coordinates layout, interfaces and support; nominal dimensions alone are not fabrication tolerances |
| Material test data | Reports for the properties required by the applicable product standard and project exposure | Use the stated method, units, specimens and acceptance basis; do not transfer results between unverified items |
| Walking surface | Project-required slip, wear, load and environmental evidence for the proposed finish and condition | A wall-unit declaration does not establish floor or paving suitability |
| Exterior exposure | Project-required moisture, freeze–thaw, thermal, chemical or durability evidence where applicable | Requirements depend on climate, exposure, detailing and the governing documents |
| Facade or veneer assembly | Substrate and support design, bond or anchor evidence, joints, drainage, movement, fire and water-control documentation | Product tests and assembly tests answer different questions |
| Appearance and control | Approved range samples, mock-up, viewing conditions, batch traceability and replacement/spares plan | Natural or intentional variation must be agreed, not inferred from one photograph |
Four shortcuts that are not specification evidence
Tap sound
A “crisp” or “dull” sound is affected by shape, thickness, support, contact point and damage. It is not a substitute for product identity or a documented test result.
Apparent weight
Comparing two loose samples by hand does not control dimensions, geometry, voids or moisture condition. Use declared dimensions and mass data for coordination, then verify the required performance separately.
Permeable or impermeable labels
Do not turn a broad trade family into a universal water-performance claim. The unit, joints, bedding or fixing, drainage and complete wall or floor build-up must be evaluated under the applicable requirements.
Colour, glaze or surface appearance
A photograph cannot establish raw body, firing route, absorption class, standard designation, slip result, strength or intended use. Match the exact item and its documents.
The same caution applies to generic firing-temperature and density comparisons. Those descriptions may be relevant to a defined manufacturing process, but without a declared product and evidence they should not be used to accept or reject a project material.
A practical submittal checklist
Before comparing quotations, issue one evidence schedule to every bidder. This keeps different trade vocabularies from hiding differences in scope.
- manufacturer, factory, item/model, declared product type and intended-use statement;
- current data sheet, drawings, dimensions, thickness, profile, finish, colour reference and unit mass;
- applicable product standard or approval, jurisdiction, edition and declared classification;
- complete test reports required by that standard and the project, with sample identity and method details;
- assembly drawings and responsibility matrix for substrate, adhesive or mortar, rails, clips, anchors, joints, cavities, movement, drainage and fire stopping as applicable;
- approved range samples, mock-up and objective inspection/acceptance criteria; and
- quantities by item, special pieces, waste and spares, batch traceability, packaging and replacement plan.
If a report identifies only a generic material name, ask the supplier to show how the tested sample maps to the proposed item and current production. If the standard scope or item identity still cannot be established, record the gap instead of filling it with a translation or assumption.
Choose the right product-family route
LOPO’s product pages are useful starting points for defining the enquiry, but a family page is not the project specification. Confirm the current item, documents and complete assembly for the actual use.
Brick and brick-slip forms
Review the Terracotta Brick family, then identify adhered, mortared or supported construction and its evidence.
Wall tile forms
Use the Terracotta Tile page to define format and finish before checking the proposed installation system.
Floor and paving forms
Start with Terracotta Floor Tile, then state traffic, exposure, surface condition and project acceptance criteria.
Mechanically fixed facade forms
Start with Terracotta Rainscreen and coordinate the panel, support, cavity and wall interfaces as one package.
Build a comparable clay-product enquiry
Share the project location, intended use, elevations or paving plan, exposure, target formats and finishes, support concept, applicable standards, evidence schedule, quantities and programme. LOPO can then respond against one defined brief rather than an ambiguous product nickname.