UKCSA 25th Anniversary

UKCSA - The "Guardian of quality for cast stone"

In February 2016 the Cast Stone Association celebrated its 25th anniversary as the "Guardian of quality for cast stone", and has grown to become the first point of reference for all matters regarding cast stone.

UKCSA technical manual

Cast Stone - Technical

Some of the key technical aspects of cast stone, including the UKCSA Quality Mark for cast stone, are considered below.

The UKCSA technical manual is also available to view and download.

If you have any further technical questions about cast stone and its properties then please contact the Cast Stone Association on

UKCSA Quality Mark for cast stone

UKCSA Quality Mark for Cast Stone

Cast stone products manufactured by an UKCSA Full Member to the Association’s stringent requirements and specification are already supplied to a standard in excess of the BS 1217 requirements. However, the UK Cast Stone Association has introduced its own Quality Mark standard for cast stone, which all UKCSA manufacturing members are required to comply with as a condition of their membership.

British Standards for Cast Stone

British Standards for Cast Stone

The UK has a long history in the manufacture and use of cast stone and the original British Standard for Cast Stone, BS 1217 dates back to 1945. Although the standard for cast stone has been changed and improved over the years, BS 1217 remains one of the longest standing British Standards which is still in existence.

British Standards and CE Marking of Cast Stone

British Standards and CE Marking of Cast Stone

The UK has gone through a transition period from the Construction Products Directive (CPD) into the full introduction of the Construction Products Regulation (CPR) on 1st July 2013. At that time CE marking became mandatory for certain construction products which are covered by harmonised European standards.

Cast Stone Constituents

Cast Stone Constituents

UKCSA members aim to produce products which resemble natural stone as closely as possible. The colour and texture of most natural stone can be matched using crushed rock fines and / or carefully selected and graded natural sands, usually mixed with white cement.

Semi-Dry, Wet Cast or Fibre Reinforced Cast Stone

Semi-Dry, Wet Cast or Fibre Reinforced Cast Stone?

The production of cast stone can be an elaborate process. There are as many variations in the precise way UKCSA members go about their art as there are master craftsmen. But there are three main manufacturing methods, semi-dry, wet-cast and fibre reinforced cast stone.

Cast Stone Curing

Curing of Cast Stone

The correct curing of cast stone is essential to resist damage during transportation and construction, and for its long-term durability and appearance.

Cast Stone Compressive Strength

Compressive Strength of Cast Stone

A key difference between UKCSA members and other cast stone manufacturers is the high compressive strength of their products, which makes them significantly more robust and durable.

Cast Stone Permeability and Durability

Permeability and Durability of Cast Stone

Cast stone has low porosity and can surpass the capabilities of natural stone on permeability. The absorption of cast stone is measured by the Capillary Absorption Test (CAT).

Cast Stone Dimensional Tolerance

Dimensional Tolerances of cast stone

The linear dimensions of individual regular units should conform to the tolerances given in British Standards, although individual UKCSA members may specify tolerances that are tighter.

Cast Stone Testing and Quality Control

Testing and Quality Control of Cast Stone

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

Research Project into Cast Stone

Research Project into Cast Stone

This report describes a two year study carried out to develop a reliable test method and performance specification relevant to Cast Stone products. The research was undertaken by the United Kingdom Cast Stone Association and the University of Dundee under the UK government's Department of the Environment, Transport and the Regions (DETR) "Partners In Technology" programme.

Specifying Cast Stone with confidence

Specifying Cast Stone with Confidence

The UK Cast Stone Association (UKCSA) has a guidance note to specifiers and users on the characteristics of cast stone that can influence the choice in terms of supplier and type of cast stone units.

Cast Stone Choosing the right supplier

Choosing the right supplier

As with any building material performing a critical job, it’s vital you can trust the manufacturer. Most cast stone manufacturers operate without adequate quality assurance or testing regimes and may not be working to the proper standards.

Cast Stone Acceptability

Cast Stone Acceptability Guidance

The UK Cast Stone Association has an extensive document which gives guidance on all aspects of the acceptability of cast Stone.

Cast Stone Maintenance & Repair

Cast Stone Maintenance & Repair

Although cast stone elements may get dirty, this is unlikely to cause a problem unless the encrustation of dirt is causing decay to the surface, or staining the underlying stone.

Cast Stone Sustainability Statement

Sustainability Statement

In terms of sustainability, cast stone performs well in both production and within its life cycles. The material is highly durable, non-toxic, re-usable and requires virtually no maintenance or repair over its long lifespan.

Cast Stone Q&A's

Cast Stone Q&A's

Some typical questions about Cast Stone are answered here.

Cast Stone Glossary

Cast Stone Glossary

The UK Cast Stone Association (UKCSA) has definitions and descriptions of terms associated with cast stone production, specification and usage.


All data on this website is for information only and is to the best of our knowledge current and correct. UKCSA presents this information without guarantee and cannot be held liable for any consequential claims. UKCSA members will be able to advise you in more detail on all aspects of cast stone specific to their products and supply.

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