Cleaning and Preparation

When any concrete repairs are undertaken, dirt, soot, grease and any other surface contaminants should be removed. This includes moss, algae, lichens, old coatings, graffiti etc. This not only improves the aesthetic appearance but helps when identifying defective areas and is essential for the bonding of any repair materials and protective coatings.

Dry Grit Blasting involves firing grit or sand at high pressure to remove surface coatings / contaminants giving an exposed aggregate finish for new coatings.

Wet Grit Blasting involves firing water/grit at high pressure to remove surface coatings / contaminants, whilst keeping dust to a minimum. Also used for graffiti removal.

Bush Hammer or Mechanical Brushing use a mechanical powered bush hammer or rotating wire brushes to abrade the surface to remove contaminants.

Scabbling or Needle Gunning use electrical or compressed air to run the abrasive scabbling heads or steel pins in the needle gun nozzle to remove surface coatings or to abrade the surfaces for new coatings.

Pressure Washing is a very effective where contamination is not too serious as it is strong enough to remove surface contaminants without damaging the original surface.

Steam Cleaning used with Degreasants and Detergents to remove graffiti, oil grease etc.