Cast Stone Manufacturer’s Details
The name and contact details of the UKCSA manufacturing member who is certifying that the cast stone conforms to all requirements of the UKCSA Quality Mark Scheme shall be stated on the Quality Mark Label.
The manufacturer shall state the cast stone material type, which shall be either dry-cast cast stone, wet-cast cast stone or fibre reinforced cast stone.
Cube Compressive Strength
The cast stone shall have a minimum cube compressive strength of 35 MPa, which represents a strength at least 40% higher than the BS 1217 requirement.
The dimensional tolerance of the cast stone shall be in accordance with the UKCSA Specification / BS 1217, Clause 8.1.
Flatness of Plane
The flatness of plane of the cast stone shall be in accordance with the UKCSA Specification / BS 1217, Clause 8.2.
The permeability and durability of the cast stone, when tested in accordance with the Capilliary Absorption Test (CAT) shall not exceed 1.0 mg/mm2.
Download UKCSA Guidance Note: Capillary Absorption Test (CAT).
Durability Against Freeze / Thaw
Products complying with these requirements are deemed to be freeze / thaw resistant.
In accordance with BS EN 998-2 for general purpose mortar – the Characteristic Shear Strength is 0.15 N/mm2.
In accordance with BS EN 1745 – λ value for cast stone is in region of 1.2 to 1.7 W/mK for a 5% moisture content product.
Reaction to Fire
Cast stone products shall be in accordance with Euroclass A1 requirements.
Acceptability of Surface Finish
Acceptability of surface finish shall be in accordance with the UKCSA cast stone acceptability guidance.