Abstract: An apparatus (5) for renovating synthetic grass playing surfaces (1) which include a layer of particulate material. The apparatus (5) comprises a plenum chamber (20) which directs a fast moving jet of air against the particulate so as to dislodge it and direct the particulate into a collection chamber (40). The plenum chamber (20) may be adapted to effect a reciprocating motion parallel to a playing surface (1) and orthogonal to a direction of conveyance of the apparatus (5) over the playing surface (1). The collection chamber (20) may incorporate a screw conveyor system (44) to displace particulate material directed into the collection chamber (20) to an appropriate container which may be conveyed along side the apparatus (5) by a separate vehicle. The apparatus (5) may further include a particulate dispensing apparatus for applying an evenly spread layer of fresh particulate material in place of that which has been dislodged and removed from the playing surface (1).