Ceramic tile inspection

Ceramic Tile Inspection for Global Construction and Design Markets

As an ISO/IEC 17025 accredited laboratory, we provide a complete ceramic tile inspection service that evaluates dimensional conformity, mechanical strength, chemical resistance, thermal behavior, surface durability, and slip safety. Our ceramic tile inspection program supports manufacturers, exporters, importers, and procurement teams who must demonstrate compliance with EN 14411, ISO 13006, ANSI A137.1, and regional building codes for the European Union, North America, the Gulf, and Asia Pacific. Every test is performed under our CNAS-accredited quality system, delivering reports accepted by notified bodies, customs authorities, and major specification writers worldwide.

Product Samples We Regularly Test Under Our Ceramic Tile Inspection Program

Glazed ceramic floor tiles — including porcelain, double-charged, and glazed stoneware for residential and commercial flooring
Glazed ceramic wall tiles — single-fired and monoporosa tiles for interior wet and dry applications
Unglazed porcelain tiles — full-body, polished, and technical tiles for high-traffic and industrial spaces
Extruded and rustic tiles — split tiles, terracotta, and quarry tiles for heritage and exterior paving
Mosaic tiles and tesserae — glass, porcelain, and ceramic mosaic sheets for decorative and pool use
Large-format porcelain slabs and panels — thin gauges and continuous-pressed slabs for countertops and facades
Skirting, step tread, and special trim tiles — complementary accessory pieces in matching glazes and bodies

Dimensional and Surface Quality Inspection for Ceramic Tiles

Dimensions, thickness, and work size — measurement of length, width, and thickness with precision callipers and micrometers per ISO 10545-2, calculating deviations from nominal and average values to assign compliance with the specified calibre and work size range.
Straightness of sides and rectangularity — using a calibrated jig and dial gauge per ISO 10545-2 to determine bow, warpage, and angular deviation of edges and corners, ensuring that the installed tile surface is flat and lippage is controlled.
Surface flatness and curvature — measuring center, edge, and corner deviation from a reference plane to classify tiles for acceptable lippage under ANCI A108 and British Standard BS 5385-1 workmanship recommendations.
Visual surface defect inspection — systematic examination under 300 lux illumination for pinholes, crazing, blisters, specks, glaze runs, and color shade consistency against approved reference samples and ISO 10545-2 criteria.
Water absorption and porosity classification — determination of water absorption by boiling or vacuum immersion method according to ISO 10545-3, assigning the tile group (BⅠa, BⅠb, BⅡa, BⅡb, or BⅢ) that defines its suitability for floor, wall, or exterior installations.

Mechanical Performance Testing in Our Ceramic Tile Inspection Scheme

Modulus of rupture and breaking strength — three-point bending test on whole tiles per ISO 10545-4, applying load at a constant rate until failure to measure the minimum breaking load and calculate modulus of rupture. This is the primary mechanical classification parameter for determining whether a tile meets the strength requirements for floor or wall use under EN 14411.
Deep abrasion resistance of unglazed tiles — rotating steel disc method with a controlled abrasive per ISO 10545-6, measuring the volume of material removed from the surface and comparing against the pass/fail thresholds for vitreous and semi-vitreous tiles.
Surface abrasion resistance of glazed tiles — PEI visual classification test using a rotating abrasive load per ISO 10545-7. Tiles are subjected to defined numbers of revolutions and the visual wear is compared to reference standards to assign a PEI class from 0 to 5, confirming suitability for light, medium, heavy, or industrial traffic.
Scratch hardness of surface — Mohs scratch test per EN 101, determining the mineral hardness scale value of the glaze to predict resistance to scoring by sand, keys, and cleaning equipment.
Impact resistance and recovery behavior — steel ball drop and pendulum impact methods per ISO 10545-5 and customer-specific tests to measure resistance to sudden blows and to assess risk of cracking during transport or after installation.

Chemical and Stain Resistance Evaluation for Ceramic Tiles

Resistance to household chemicals and swimming pool additives — spot exposure to acids, alkalis, detergents, and salts per ISO 10545-13 for 24 hours, followed by visual inspection for changes in gloss, color, and surface texture, classifying the tile as resistant (GA, GLA, GHA) or not resistant.
Stain resistance and cleanability — application of staining agents (iodine, olive oil, coffee, marking ink, etc.) per ISO 10545-14, cleaning after a defined contact time and assessing the ease of removal and remaining visual trace, reporting the stain class from 5 (easiest clean) to 1.
Lead and cadmium release from glazed surfaces — leaching test with 4% acetic acid at 22 °C for 24 hours according to ISO 10545-15 and ASTM C895, analyzing the leachate by ICP-OES to ensure compliance with FDA, Prop 65, and EU Toy Safety Directive limits for food contact surfaces.
Acid and alkali resistance for industrial tiling — extended immersion in stronger acids and alkalis as specified by ASTM C650 and chemical process plant specifications, measuring weight loss and surface degradation after exposure.

Thermal, Moisture, and Frost Resistance Testing for Ceramic Tiles

Linear thermal expansion coefficient — dilatometer measurement per ISO 10545-8 between ambient and 100 °C to determine the coefficient of thermal expansion, ensuring compatibility with substrates, setting materials, and preventing stress at expansion joints.
Thermal shock resistance — cycling tiles between a hot oven at 105 °C and cold water at 15 °C ten times per ISO 10545-9, visually inspecting for crazing, cracking, and glaze detachment to guarantee performance in underfloor heating and temperature-cycling environments.
Moisture expansion of unglazed tiles — measurement of irreversible moisture expansion after boiling in water according to ISO 10545-10, essential for exterior facades and swimming pool surrounds where long-term dimensional changes can cause spalling.
Frost resistance — freeze-thaw cycling of water-saturated tiles per ISO 10545-12 (minimum 100 cycles) or ASTM C1026, verifying that tiles for exterior use in cold climates show no cracking, flaking, or strength loss after exposure.
Craze resistance under autoclave conditions — exposure to high-pressure steam at 159 °C per ASTM C424 to force moisture-accelerated glaze crazing, evaluating the fired and glazed body compatibility.

Slip Resistance and Safety Inspection in Our Ceramic Tile Inspection Service

Dynamic coefficient of friction (DCOF) — using a BOT-3000 tribometer per ANSI A137.1 to measure the dynamic coefficient of friction on wet and dry tile surfaces, reporting the DCOF AcuTest value for North American market compliance and slip safety assessment of floor tiles.
Pendulum friction test — using a calibrated pendulum slip tester per EN 14231, BS 7976, and the UK Slip Resistance Group guidelines to determine the PTV (Pendulum Test Value) in wet and contaminated conditions, the predominant method for European and Middle Eastern slip safety specifications.
Ramp slip test (DIN 51130 and DIN 51097) — evaluating tiles under barefoot wet conditions and shod conditions with oil on an inclined ramp, assigning the R-group (R9 to R13) and barefoot ABC classification for bathrooms, pool decks, and commercial kitchens.
Surface roughness and micro-profile measurement — stylus profilometry per EN ISO 4287 to measure Rz (mean peak-to-valley height) and Rpm, providing a predictive indicator of slip resistance that correlates with pendulum and ramp results.

Report Recognition and ISO/IEC 17025 Compliance

All test methods detailed in this ceramic tile inspection offering fall within our ISO/IEC 17025 scope of accreditation. Our reports are accepted by European notified bodies for CE marking under the Construction Products Regulation, by North American code officials and architects referencing ANSI A137.1, and by regulatory authorities in the Gulf, Australia, and Southeast Asia. Whether you require initial type testing for a new ceramic tile range, batch release verification for an incoming container, or a failure investigation of a flooring defect claim, we provide the measurement accuracy, technical expertise, and documentation integrity that global ceramic supply chains require.