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Bespoke
Colours
Bespoke Colours
Forticrete has a library of over 400 Cast Stone colours that can be reproduced with accuracy at any time. Should you require a specific colour that is not in the catalogue, this can be provided at a supplementary cost.
Engraving Service
Communication is a key requirement in today's world. Forticrete can offer you engraved cast stone units, which could be simple name stones or logos, or a combination of both. This instantly differentiates your building, making it immediately recognisable and unique.
General Notes
All dimensions shown in this brochure are in millimetres. Stone to stone joints are nominally 5mm unless otherwise stated. No provision will be made for fixings unless they have been specified or are stated in this brochure
Specification Sheet
Forticrete Cast Stone Dressings are manufactured from high grade limestone and sandstone aggregates that have been chosen for their known performance and reliable quality. The cement, pigments and waterproofing agents all conform to their appropriate British or European Standard.
Forticrete Cast Stone Dressings are created from an homogeneous mix, without using a 'backing' material. This ensures that no undue stresses are built up within the unit. The major technical performance characteristics of Forticrete Cast Stone Dressings exceed the requirements of BS 1217 and the United Kingdom Cast Stone Association specification.
| Compressive Strength: | In accordance with the updated UKCSA recommendations, all Forticrete Cast Stone is now manufactured with a design compressive strength potential in excess of 35 MPa, (35 N/mm2) when reaching concrete maturity. |
| Density: | Typical Material Density = 2100Kg/m3 |
| Thermal Conductivity 'K' : | Exposed: 1.56 W/mK Protected: 1.46 W/mK |
| Water Absorption: ( Typical ): | 3.5% |
| Drying Shrinkage: | Less than 0.04% |
| Mortar: | Mortar used for the installation of Cast Stone Dressings should not be stronger than Designation III (1:1:5/6). |
| Handling Reinforcement: | Any units over 600mm in length contain one or more steel bars.These are included to comply with Health and Safety Regulations,relating to the handling of the product by site operatives. |
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Fixings for Support, Restraintand Handling: ( Typical ): |
Some Forticrete Cast Stone Dressings will incorporate 100mm stainless steel dovetail slots to restrain lateral movement in vertical units i.e. window jambs, door jambs etc. M16 sockets may also be used for handling purposes in the factory. |
| Structrual Properties: | Unless otherwise agreed with Forticrete, all
cast stone units are decorative and are not designed to be load
bearing. The structural stability of all units in their finished
state should be approved by the structural engineer carrying out
the overall design for the project. Wind loading on large window
features, sections of stonework, supporting lintels and fixings to
cast stone units should also be considered early in the design
process. Due care and attention should also be given to the differential shrinkage and expansion rates between clay and cast stone units when employed in combination. Site operatives must be made aware of the need to support and protect all cast stone units in their temporary state to negate the risk of any load being implied upon them whilst construction is taking place e.g. window heads. Inserts and anchor slots can easily be incorporated into cast stone for restraint and for lifting at the request of the specifier/designer. However, if any unit is to be hoisted with more than one lifting socket, this should be carried out in conjunction with a spreader beam to eliminate any bending action of the unit. Forticrete may use lifting sockets to transport units at the source of manufacture. The use of such sockets on site should be checked with the plant of origin. Forticrete are able to offer guidance on all areas of design and can be contacted via the telephone numbers on the back of this brochure. |
| Control Joints: | Consideration must be given to the creation of suitable movement control joints, full recommendations for which are given in the Forticrete Architectural Products Design Guide. Generally, control joints for Cast Stone should be spaced at a maximum of 6m centres. |
| Weathering: | Weathering class: CAT to BS 1217 and UKCSA Specification. Factors such as design, detailing, exposure, climate and local environment all contribute to the way in which Cast Stone will weather. Forticrete Cast Stone will weather in much the same way as natural stone in similar circumstances. |
| Efflorescence: | Common to all cementitious based products, there is a possibility of lime bloom efflorescence. This is a temporary phenomenon which may cause a degree of lightening to the colour of the stone but it will not impair its performance in respect to its durability or strength. In due course, when subjected to normal weathering, the efflorescence will diminish and eventually disappear completely. Adequate protection during construction will minimise this effect.sings should not be stronger than Designation III (1:1:5/6). |
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