Brickwork stains – bricks may be stained as follows:

• Cement staining from mortar and concrete
• Lime running
• Dirt, grime, soot and smoke
• Oil, grease and tar
• Organic Growths
• Paint and Graffiti
• Efflorescence
• Yellow or green efflorescence (Vanadium salts)
• Iron Staining
• Manganese staining