The Roger Bullivant range of over 80 pile and mini-pile types encompasses both displacement and replacement piles. Displacement piles can be provided in traditional forms such as driven pre-cast concrete, driven steel tubes or timber, driven and vibrated cast in-situ or displacement auger techniques (continuous helical displacement). The portfolio of replacement piles includes C.F.A. (continuous flight auger) and open hole augered piles. Nowadays, displacement piles form the majority of piles installed as no arising are brought to the surface and there is therefore no material to remove from site.