Stone by Design LTD's Architectural Cast Stone, meets the very highest of standards BS 1217 and BS 8110 ‘Cast stone - Specification’ Standard and UKCSA Specification. BS 8110 was superseded by EN 1992.
As with all reconstructed stone cement-based products, the temporary phenomenon known as efflorescence is likely to occur. It has a white, greyish tint. It flakes off the surface, and is present only on the surface.
It's a crystalline deposit of salts, often seen on the surface of concrete, brick, stucco, or natural stone surfaces.
It occurs when water leaves behind salt deposits, and is present on or in the masonry surface.
Although unsightly, efflorescence is in no way damaging to the product. This effect reduces over a period of time with natural weathering. However, the specially selected additives, help to prevent the effect as much as possible.
Dimensional tolerances permitted by BS 1217: 1997