25mm SPI Clayfill Ground Heave 2.4m x 1.2m 12 per pack

25mm SPI Clayfill Insulation

SPI Clayfill is a compressible-fill material used to reduce the pressure against foundations due to clay heave

SPI Clayfill (Clay Heave Protection) is a 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.

SPI Clayfill 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.

Key Benefits

• 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

• Lightweight

• Durable

• A+ rated in the BRE Green Guide to Specification

•  Board Size: 2400mm x 1200mm