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For use below concrete ground beams in piled foundation construction and at the vertical face of deep trench foundations to reduce the pressure exerted on the concrete by expansion of clay soils (clay heave) during the life of the structure. Suitable for use on ground beams of a maximum depth of 600 mm in piled construction and on the vertical face of trench-fill foundations up to 2 m deep.

General information
Specification data - Compressible board substructure formwork
Product Reference


Size -

2000 mm

2400 mm


1000 mm

1200 mm


50 mm

100 mm

150 mm

200 mm

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