Assurance

Quality and testing

Every figure published on this site is traceable to a batch, and every batch is traceable to a bench. Certificates are issued per shipment and reference the crate stencils.

01 / Position

Testing at a glance

Batch tests per month: 34
Type test interval: 12 mo
UK verification: Annual
Certificates issued: Per shipment
Retained samples: 36 mo
Non-conformance rate: 1.2 %

02 / Laboratories

Where testing is carried out

Testing laboratories and scope
Laboratory	Scope	Frequency
Karnataka Institute of Materials Testing, Kalaburagi	Batch testing — compressive strength, water absorption, density	Every production batch
Central Building Research reference laboratory, Roorkee	Type testing — flexural strength, abrasion, frost resistance	Annually and on formulation change
Lucideon, Stoke-on-Trent	UK verification — slip resistance (PTV), water absorption	Annually, on UK-landed samples

03 / Standards

Standards and certification

Declarations of performance are issued per shipment and per stone type.

Standards held and their scope
Standard or certificate	Scope
BS EN 1341:2012	Slabs of natural stone for external paving
BS EN 1342:2012	Setts of natural stone for external paving
BS EN 12057:2004	Modular tiles — interior and exterior
BS EN 12058:2004	Slabs for floors and stairs
BS EN 1469:2015	Slabs for cladding
CE / UKCA declaration of performance	Issued per shipment and stone type
ISO 9001:2015	Processing unit, certificate MSPI-QMS-2021-0447
ISPM 15	Heat-treated timber crating, stamp IN-KA-2287

04 / Inspection

In-process inspection

Six control points between the bench and the container.

In-process inspection regime
Stage	Check	Rate
Bench release	Colour reference against retained bench plate	Every bench
Post-calibration	Thickness across four points per slab	1 in 20 slabs
Finish release	Surface uniformity and arris condition	1 in 10 slabs
Shade sorting	Sorted to a single band, crate marked	Every crate
Pre-crating	Dimensional check against order tolerance	1 in 20 slabs
Loading	Crate weight, strapping, stencil legibility	Every crate

05 / Values

Declared values by stone

These are the values that appear on the declaration of performance for each stone type.

Declared performance values across the range
Property	Standard	Shahabad Grey	Shahabad Yellow	Shahabad Maroon	Shahabad Cream
Compressive strength, dry	BS EN 1926	112 MPa	104 MPa	118 MPa	98 MPa
Compressive strength, saturated	BS EN 1926	96 MPa	88 MPa	101 MPa	83 MPa
Flexural strength	BS EN 12372	16.4 MPa	14.8 MPa	17.1 MPa	13.9 MPa
Water absorption	BS EN 13755	0.38 %	0.52 %	0.31 %	0.61 %
Apparent density	BS EN 1936	2,610 kg/m³	2,560 kg/m³	2,680 kg/m³	2,540 kg/m³
Abrasion resistance	BS EN 14157	18.2 mm	19.6 mm	17.4 mm	20.8 mm
Slip resistance, dry	BS 7976-2 pendulum	78 PTV	76 PTV	74 PTV	72 PTV
Slip resistance, wet	BS 7976-2 pendulum	42 PTV	39 PTV	37 PTV	34 PTV
Frost resistance	BS EN 12371	Pass, 56 cycles, < 1 % loss	Pass, 56 cycles, < 1 % loss	Pass, 56 cycles, < 0.8 % loss	Pass, 48 cycles, < 1.2 % loss
Open porosity	BS EN 1936	1.1 %	1.4 %	0.9 %	1.7 %
Thermal shock	BS EN 14066	No visible change, 20 cycles	No visible change, 20 cycles	No visible change, 20 cycles	No visible change, 20 cycles

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