The minimum performance standards established by UKCSA for its cast stone manufacturing Full Members are supported by rigorous testing and quality control regimes:

Cast Stone Complies Tick UKCSA Cube compressive strength
(test results are regularly submitted to UKCSA by all cast stone manufacturing Full Members, as a condition of membership).
The minimum standard required of UKCSA Full Members represents over 40% increase in compressive strength above that indicated in the British Standard for Cast Stone, BS 1217, and at least 75% above the minimum requirement in the Standard for Manufactured Stone, BS EN 771-5.

Cast Stone Complies Tick UKCSA CAT (Capillary Absorption Test) for semi-dry cast stone
(submitted to UKCSA on a quarterly basis by semi-dry cast stone manufacturing Full Members, as a condition of membership).

Cast Stone Complies Tick UKCSA ISAT (Initial Surface Absorption Test) for wet-cast cast stone
(submitted to UKCSA on an annually basis by wet-cast cast stone manufacturing Full Members, as a condition of membership).

Cast Stone Complies Tick UKCSA Documented quality procedures for all UKCSA manufacturing Full Members.
The Association’s Quality Mark Scheme gives users and specifiers of cast stone further reassurance that the cast stone they are using is durable and produced to the highest standards. The UKCSA Quality Mark label on cast stone indicates that the cast stone product is manufactured to far higher quality and testing requirements than required for either cast stone to BS 1217 or for CE Marking of manufactured stone to BS EN 771-5.

Cast Stone Complies Tick UKCSA Plant Inspections.
For all cast stone manufacturing, new applicants for Full Membership, and annual confirmation of compliance for all existing Full Members as a condition of membership.

Testing Cast Stone

Do not accept second best when it comes to cast stone – insist on the UKCSA Quality Mark!