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Stylite expanded polystyrene Clayfill is used in clay heave protection and void fill applications. It's special compressive breaking point and thermal resistance properties mean it's perfect for meeting the current regulations for foundation construction.

Expanded polystyrene is compatible with most chemicals and materials. It is rot proof and durable, and will remain effective as a heave protection for the life of the construction; it is not affected by bacteria, moulds or fungi and will not provide nutrient value for insects or vermin.

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Standard product features


Special sizes are available on request.

NBS Specification

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This product is associated with the following NBS Create clause:
45-50-30/390 Compressible board substructure formwork
45-50-30/420 Permanent insulation formwork (PIF)

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

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Styrene Packaging & Insulation


+44 (0)1274 691777

Product reference

Clayfill Clay Heave Protection


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Manufacturer details

Morley Carr Road,
Low Moor,
West Yorkshire, BD12 0RA
Tel +44 (0)1274 691777
Fax +44 (0)1274 693832
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