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Claymaster

A compressible-fill material. It is used to prevent potential problems in foundations caused by moisture movement in soils, by being permanent shuttering for cast in-situ reinforced concrete, reducing pressure on ground beams in piled foundations and on the side of trench fill. *For higher shrinkage or void values, consult the manufacturer.

Shrinkage Potential Predicted Lateral NHBC Recommended Void Claymaster Thickness for 'Equivalent Void'
Low Zero Zero
Medium 25mm 50mm
High* 35mm 75mm

Claymaster