Hi all,    We're looking at what to use to finish of the external blockwork between the cedral cladding and ground. The ground is quite wet so we'll be putting in drainage and probably finishing with gravel or slate chippings.    There is also insulation board to go against the block work but I'm not sure what to finish it with. The builder is taking about using what looks like Eurocell soffit board in a dark grey and I'm looking at some flat cedral cement board.