Claymaster is a lightweight and easy to install EPS compressible-fill material used to reduce the pressure against foundations due to clay heave. 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 Agrement (BBA) as a compressible fill material to reduce the pressure exerted on concrete foundations from expanding clay soils (clay heave). 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. 

Supplied coloured pink to easily differentiate from standard EPS.