Jablite Claymaster - 100mm (Clay Heave Protection)

Jablite Claymaster - 100mm (Clay Heave Protection)

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    £29.88 EX VAT £35.86 INC VAT

    Additional Info

    Product Code:
    • Application:
      Jablite Claymaster (Clay Heave Protection) is a BBA certified product that provides protection against clay heave.
    • Type:
      Compressible expanded polystyrene board
    • Product Size:
      2400mm x 1200mm
    • Thickness:
    • Pack Coverage:
    • Estimated Delivery:
      2-3 Working days

    Product Description

    Jablite Claymaster - 100mm (Clay Heave Protection)

    Jablite Claymaster (Clay Heave Protection)

    Jablite Claymaster (Clay Heave Protection) is a BBA certified product that provides protection against clay heave.

    Shrinkable clays are soils containing a large proportion of mineral particles of less than 0.002mm in diameter. This produces an extremely cohesive soil type when wet, but shrinks to a crumbly, crazed structure when dry. The expansion and contraction process during wet and dry periods is known as ‘clay heave’. This can cause severe problems with foundations.

    Jablite Claymaster works by surrounding the pile cap with a layer of low density, compressible, expanded polystyrene, reducing pressure on the ground beams as the surrounding clay expands and contracts.

    Thickness: 100mm
    Board sizes: 2400 x 1200mm
    Board coverage: 2.88m2
    Standard thicknesses: 50, 75, 100

    Key Benefits:

    BBA (British Board of Agrément) accredited, certificate 90/2543
    A permanent solution to clay heave problems
    Easy to install
    Negligible compression during concrete casting
    No need for specialist trades or equipment
    Resistant to moisture
    A+ rated in the BRE Green Guide to SpecificationBuilding Substructure - Below ground clay heave protection

    Claymaster is an EPS compressible-fill material used to reduce the pressure against foundations due to clay heave. Supplied coloured pink to easily differentiate from standard EPS. It is installed to the sides of deep trench fill and to the base and sides of concrete beam piled foundations. Claymaster has been tested and approved by the British Board of Agrément (BBA) as a compressible fill material to
    reduce the pressure exerted on concrete foundations from expanding clay soils (clay heave). Certificate number 90/2543. Claymaster does not degrade when placed in high moisture areas and is resistant to the effects of freeze thaw. Claymaster will remain an effective compressible fill for the life of the building

    There are no specific requirements in the Building Regulations for the use of compressible-fill materials. Regulation A2 states that ‘buildings shall be constructed so that ground movement caused by swelling, (or) shrinkage ...of the subsoil... will not impair the stability of any part of the building’. Claymaster has been assessed by the BBA to prove its performance in meeting the requirement of this Regulation when installed in areas of possible clay heave. The NHBC Standards, Chapter 4.2, ‘building near trees’, states that low-density compressible polystyrene is a suitable proprietary material to alleviate ground pressures on foundations in shrinkable soils


    BBA: Jablite Claymaster has been assessed and approved by the British Board of Agrément for use as a compressible fill material in foundation construction. Certificate number 90/2543

    NHBC Approved: NHBC accepts the use of Jablite Claymaster, provided it is installed, used and maintained in accordance with the BBA Certificate, in relation to NHBC Standards, Chapters 4.2 Building near tress; 4.3 Strip and trench foundations and 4.4 Raft, pile, pier and beam foundations.

    Quality: All Jablite products are manufactured in production facilities which are certified to ISO 9001 Quality Management

    Environmental Responsibility: All Jablite manufacturing facilities are ISO 14001 certified. We operate an Environmental Management System which includes our supply chain (see BREEAM section for more information)

    Fire: Concrete foundations below ground are not required to provide fire resistance. When properly installed Jablite Claymaster is fully protected by the foundation construction and soil backfill and will have no adverse effect on the fire performance of the building into which it is installed. Jablite Claymaster is supplied as Euroclass E flame retardant material as standard.

    Jablite Claymaster - 100mm (Clay Heave Protection)

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