First, we shot blasted the floor areas using our dust-free vacuum shot blasting machines. As our blasting equipment weighs 1.5 tonnes, we had to lower it into the basement areas by crane (at only 800mm wide, it can, however, fit through a standard single doorway).The shot blasting stripped off the existing floor coatings and all the residual debris, leaving a clean surface for us to work with. We then applied an epoxy resin coating system throughout. We programmed work carefully to allow engineering staff permanent access to the computer rooms, and did much of the work at night and at weekends. All staff had to pass CRB checks due to the security issues involved.